URC AC-PRO-II Instructions

: June 3, 2024
: URC

Table of Contents

URC AC-PRO-II Instructions
AC-PRO-II® Communications Modbus Register Map
References
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URC AC-PRO-II Instructions

URC-AC-PRO-II-Instructions-PRODACT-IMG

AC-PRO-II® Communications Modbus Register Map

AC-PRO-II: Registers 7000 – 7019: Output Coils
7020 – 7099: Information
7107 – 7199: User settings (can be set using Modbus Communications)
7100, 7101, 7102, 7104, 7105, 7149, 7150: System settings, set at trip unit only
7200 – 7399: Trip History data
AC-PRO-II: Registers 83 – 324 are “backwards” compatible with existing AC-PRO registers. Exceptions are noted.

Data Types

OC = Output Coil (write only)
IR = Information Register (read only)
HR = Holding Register (read/write). See note 6 at the end of this document. * = future

See the end of the document for Modbus Register Notes.

Table A: AC-PRO-II Modbus Register Map

Item Register Address| Description (Data Point Name)| Unit| Size| Data Type| Revision Notes
---|---|---|---|---|---
7000| Force Reset| N/A| Word| OC|

7001

| Force Trip

(permission must be set. see note 6)

| ****

N/A

| ****

Word

| ****

OC

|
7002| Force Acknowledge Trip Event (Clears Alarm Code Register 7040 Word 0 bit 0)| N/A| Word| OC|
7003| Force Clear Trip History and Trip Totals| N/A| Word| OC|
7004| Force Clear Power / KVA-Hrs and KW-Hrs| N/A| Word| OC|
7005| Force Clear Alarm Relay #1 (AC-PRO-II)| N/A| Word| OC|
7006| Close Breaker (any relay assigned as breaker)| N/A| Word| OC| Register added in v4.0

7007| Force Relay #3 (future) (on for 100ms)| N/A| Word| OC|
7008| Soft QT Switch ON| N/A| Word| OC| Register added in v4.0
7009| Soft QT Switch OFF| N/A| Word| OC| Register added in v4.0
7010| Force Clear Power / KVAD and KWD| N/A| Word| OC| Register added in v4.0
7011| Reserved| | | |
7012| Reset Breaker Cycle Counter| N/A| Word| OC| Register added in v4.0
7013 – 7019| Reserved| | | |
7020| Trip Unit RS-485 Address| N/A| Word| IR|
7021| Reply Delay, range: 0-10 (min added delay)| msec| Word| IR|
7022| Trip Unit Serial Number Word 0 – Most Significant| N/A| Word| IR|
7023| Trip Unit Serial Number Word 1| N/A| Word| IR|
7024| Trip Unit Serial Number Word 2| N/A| Word| IR|
7025| Trip Unit Serial Number Word 3| N/A| Word| IR|
7026| Trip Unit Serial Number Word 4| N/A| Word| IR|
7027| Firmware Version Word 0 (Most Significant) MS Byte = Major, LS Byte = Minor| ****

N/A

| ****

Word

| ****

IR

|
7028| Firmware Version Word 1

MS Byte = Build, LS Byte = Revision

| ****

N/A

| ****

Word

| ****

IR

|
7029| Special Factory Settings Configuration| N/A| Word| IR|
| ****

Bit 0; 1 = LT can be OFF Enabled

Bit 7: 1 = VDM rev2 hardware (“backfed” VDM)

Bit 8: 1 = Main board hardware with EEPOT feedback Bit 9: 1 = Max RMS is 10xCT

Communications – Modbus Register Map rev 4.0

7031| RS-485 Parity: 0 = None, 1 = Odd, 2 = Even| N/A| Word| IR| Register added in v4.0
---|---|---|---|---|---

7032 – 7039| Reserved| N/A| Word| IR|

7040

| Alarm/Status Code Word 0 – Most Significant Bit 0; 1 = Trip Event Alarm

Bit 1; 1 = Current > LT Pickup Alarm Bit 2; 1 = Actuator Open Alarm

Bit 3; 1 = Internal Error Alarm Bit 4; 1 = Phase Loss / Reverse Bit 5; 1 = Ground Fault Alarm

Bit 6; 1 = Breaker Closed

0 = Breaker Open or feature unused

| ****

N/A

| ****

Word

| ****

IR

| V2.0.19 added Phase Loss, Test Mode, GF Alarm

Note 15

7040

(continued)

| ****

Bit 7; 1 = Sluggish or Stuck Breaker Alarm Bit 8; 1 = QT Switch is ON

Bit 9; 1 = Service Due Alarm Bit 10; 1 = Reverse Power Alarm

*Bit 11; 1 = Battery Low

Bit 12; 1 = UV Under Voltage Alarm (relay operated)

Bit 13; 1 = OV Over Voltage Alarm event (relay operated)

Bit 14; 1 = GF Defeated by Input

Bit 15; 1 = VDM Attached

| | | | ****

V4.0 added bit 9 – 10

7041| *Alarm Code Word 1

*Bit 0; 1 = FUTURE

*Bit 1; 1 = FUTURE

*Bit 2; 1 = FUTURE

*Bit 3; 1 = FUTURE

*Bit 4: 1 = Reversed Phase CT Polarity

*Bit 5: 1 = Phase Unbalanced Alarm

Bits 6-15 not used

| N/A| Word| IR| ****

V4.0 changed bit 5

7045

| ****

Current Neutral (standard accuracy)

| ****

Amps

| ****

Word

| ****

IR

| V1.1-1.6: unscaled V1.7 and later: scaled Note 13

7046

| ****

Current GF

| ****

Amps

| ****

Word

| ****

IR

7050

| ****

Voltage AB

| Volts| ****

Word

| ****

IR

| Register added in v1.9.

Note 14

7051

| ****

Voltage BC

| Volts| ****

Word

| ****

IR

| Register added in v1.9.

Note 14

7052

| ****

Voltage CA

| Volts| ****

Word

| ****

IR

| Register added in v1.9.

Note 14

7053| KW Phase A| KW| Word| IR| Note 11
7054| KW Phase B| KW| Word| IR| Note 11
7055| KW Phase C| KW| Word| IR| Note 11
7056| KVA Phase A| KVA| Word| IR| Note 11
7057| KVA Phase B| KVA| Word| IR| Note 11
7058| KVA Phase C| KVA| Word| IR| Note 11
7059| KW Total| KW| Word| IR|
7060| KVA Total| KVA| Word| IR|
7061| PF Total| %| Word| IR|
7062| KVA-Hrs Register – Most Significant (note 7)| KVAH| Word| IR|
7063| KVA-Hrs Register – Least Significant (note 7)| KVAH| Word| IR|
7064| KW-Hrs Register – Most Significant (note 7)| KWH| Word| IR|
---|---|---|---|---|---
7065| KW-Hrs Register – Least Significant (note 7)| KWH| Word| IR|
7066| KW Signs & Lead/Lag PF

*Bits 0, 1,2 are future:

*Bit 0; Phase A, 1 = Lead PF, 0 = Lag PF

*Bit 1; Phase B, 1 = Lead PF, 0 = Lag PF

*Bit 2; Phase C, 1 = Lead PF, 0 = Lag PF Bit 8; Phase A KW, 1 = Pos, 0 = Neg

Bit 9; Phase B KW, 1 = Pos, 0 = Neg Bit 10; Phase C KW, 1 = Pos, 0 = Neg Bit 11; KW-Hrs, 1 = Pos, 0 = Neg

Btis 3-7, and 12-15 = 0 (not used)

| N/A| Word| IR|

7067

| KW-Hrs (alt) signed 32-bits – Most Significant| ****

KWH

| ****

Word

| ****

IR

|
7068| KW-Hrs (alt) – Least Significant| KWH| Word| IR|

7069

| ****

Frequency

| ****

Hertz

| ****

Word

| ****

IR

| Register added in v2.0.27 Note 16

7070

| Negative Sequence OverVoltage (NSOV) (only available if Phase Loss enabled)|

%

| ****

Word

| ****

IR

| Note 17
7071| Status

Bit 0: Relay #1 is Closed

Bit 1: Hard QT Switch is ON Bit 2: Soft QT Switch is ON Bit 3: Service Now

Bit 4: Relay #2 is Closed

Bit 5 – 15: Future

| N/A| Word| IR| Register added in v4.0

7072

| ****

Special use: Current Phase A (with “Low” filter at 2%)

| ****

Amps

| ****

Word

| ****

IR

| Register added in v2.0.31.

Note 17

7073

| ****

Special use: Current Phase B (with “Low” filter at 2%)

| ****

Amps

| ****

Word

| ****

IR

| Register added in v2.0.31.

Note 17

7074

| ****

Special use: Current Phase C (with “Low” filter at 2%)

| ****

Amps

| ****

Word

| ****

IR

| Register added in v2.0.31.

Note 17

7075

| ****

Special use: Neutral Current (with “Low” filter at 2%)

| ****

Amps

| ****

Word

| ****

IR

| Register added in v2.0.31.

Note 17

7076

| ****

Special use: GF Current (with “Low” filter at 2%)

| ****

Amps

| ****

Word

| ****

IR

| Register added in v2.0.31. Note 17Added in v2.0.31.

Note 17

7077 – 7087| Smart 1-Line Waveforms| N/A| 11 Words| IR| Registers added in v4.0

7088 – 7089| Reserved| | | | Register added in v4.0
7090| Breaker Cycle Count| N/A| Word| IR| Register added in v4.0
7091 – 7099| Reserved| | | |
7077 – 7099

| ****

Reserved

| ****

N/A

| ****

N/A

| | ****

N/A

7100| CT Rating| Amps| Word| IR|
7101| CT Secondary| Amps| Word| IR|
| 0 = 1

1 = 0.50

2 = 0.40

3 = 0.25

4 = 0.20

5 = 0.18

| | | |
7102| Neutral CT Secondary 0 = 2

1 = 1.5

2 = 1

3 = 0.50

4 = 0.40

5 = 0.25

6 = 0.20

7 = 0.18

| Amps| Word| IR|
7103

(note 11)

| Range (Modbus only) and Miscellaneous (Scaling) Bit 0; 1 = x1

Bit 1; 1 = x10

Bit 2; 1 = divide by 10

Bits 0-2: Scaling applies CT Rating, settings Pickups,

Bit 4; 1 = User Settings can be changed over communications

Bit 5; 1 = Modbus Soft QT SW Enabled Bit 6; 1 = CT Auto Polarity is ON

Bits 7-15 = 0 (not used)

| | | |
---|---|---|---|---|---
7104| Frequency setting| Hz| Word| IR|

7105

| System Rotation (Phase Loss/Reverse feature only) (0=CBA, 1= ABC)| ****

N/A

| ****

Word

| ****

IR

| Register added in v2.0.19 Note 15

7106| Reserved| N/A| Word| IR|

7107

| ****

System Time: hrs (24-hr) MS, mins LS (note 9)

| ****

N/A

| ****

Word

| ****

HR

| V1.1-v1.6 performs different than v1.7 and later. Note 9

7108

| ****

System Time: secs MS, month LS (note 9)

| ****

N/A

| ****

Word

| ****

HR

| V1.1-v1.6 performs different than v1.7 and later. Note 9

7109

| ****

System Time: day MS, year (0-99) LS (note 9)

| ****

N/A

| ****

Word

| ****

HR

| V1.1-v1.6 performs different than v1.7 and later. Note 9

7110

| ****

Operate Alarm Relay #1 Setting (Alarm relay operation settings)

Bit 0; 1 = Actuator Open Alarm

Bit 1; 1 = Internal Error Alarm Bit 2; 1 = UnderVoltage Alarm

Bit 3; 1 = OverVoltage Alarm

Bit 4; 1 = Sluggish Breaker

Bit 5; 1 = LT Pickup Alarm Bit 6; 1 = Trip Alarm

Bit 7: 1 = GF Alarm

Bit 8: 1 = Phase Loss / Reverse Bit 9: 1 = Reversed CT Alarm Bit 10: = 0 (not used)

Bit 11: 1 =Phase Unbalanced Alarm

Bit 12: 1 =Service Due

Bits 13 – 14= 0 (not used)

Bit 15: 1 = Reverse Power Alarm

| ****

N/A

| ****

Word

| ****

HR

| V2.0.19 added Phase Loss, Test Mode, GF Alarm

Note 15

Bits 9, 11 – 12, 15 added in v4.0

7111| Alarm Relay #2 (future)| N/A| Word| HR|
7112| Alarm Relay #3 (future)| N/A| Word| HR|

7113

| LT Pickup (0 = OFF, only available if trip unit shipped with special factory setting)| ****

Amps

| ****

Word

| ****

HR

|
7114| LT Delay x2

(value is 2 times actual delay in seconds)

| sec| Word| HR|
7115| LT Thermal Memory 1 = On, 0 = Off| N/A| Word| HR|
7116| ST Pickup (0 = OFF)| Amps| Word| HR|
7117| ST Delay – Delay Band: 1 = 0.07

2 = 0.10

3 = 0.15

4 = 0.20

5 = 0.30

6 = 0.40

| sec| Word| HR|
7118| ST I2 T 1 = On, 0 = Off| N/A| Word| HR|
7119| I Pickup (0 = OFF)| Amps| Word| HR|
7120| GF Pickup (applies to either Trip or Alarm, 0 = OFF)| Amps| Word| HR|

7121

| GF Delay – Delay Band: (applies to either Trip or Alarm)

1 = 0.1

2 = 0.2

3 = 0.3

4 = 0.4

5 = 0.5

| ****

sec

| ****

Word

| ****

HR

|

7122

| GF Slope (applies to either Trip or Alarm) 0 = None, 1 = I2T, 2 = I5T| ****

N/A

| ****

Word

| ****

HR

| Register added in v1.9.

Note 14

7123| GF Type (applies to either Trip or Alarm): 0=both Trip and Alarm OFF

1= Residual

2=Ground Return

| N/A| Word| HR| See Note 15
| I f value is 1 or 2 : see register 7110 bit 7 to determine if GF is set to Trip (bit 7 = 0) or Alarm (bit 7 = 1)| | | |
---|---|---|---|---|---
7124| Neutral Protection Percent| %| Word| HR| Register repurposed in v4.0

7125 – 7126| Reserved| N/A| Word| IR| Register removed in v4.0
7127| Quick-Trip Instantaneous Pickup| Amps| Word| HR|
7128| Quick-Trip GF Pickup| Amps| Word| HR|
7129| QT-GF Type:

0=Off, 1=Residual, 2=Ground Return

(when GF Type is OFF then no restrictions; otherwise must either be OFF or match GF Type)

| N/A| Word| HR|

7130

| ****

Phase Loss / Reverse Trip Enable 1 = On, 0 = Off

| ****

N/A

| ****

Word

| ****

HR

| Register added in v2.0.19.

Note 15

7131

| ****

Phase Loss / Reverse Delay

| ****

sec

| ****

Word

| ****

HR

| Register added in v2.0.19.

Note 15

7132

| Phase Loss / Reverse Negative Sequence OverVoltage Pickup| ****

%

| ****

Word

| ****

HR

| Register added in v2.0.19.

Note 15

7133| Reserved| N/A| Word| HR|
7134| UV Trip Enable 1 = On, 0 = Off| N/A| Word| HR|
7135| UV Trip Pickup| Volts| Word| HR|
7136| UV Trip Delay| sec| Word| HR|

7137

| ****

UV Alarm Pickup

| ****

Volts

| ****

Word

| ****

HR

| Register added in v2.0.19.

Note 15

7138

| ****

UV Alarm Delay

| ****

sec

| ****

Word

| ****

HR

| Register added in v2.0.19.

Note 15

7139| Reserved| N/A| Word| HR|
7140| OV Trip Enable 1 = On, 0 = Off| N/A| Word| HR|
7141| OV Trip Pickup| Volts| Word| HR|
7142| OV Trip Delay| sec| Word| HR|

7143

| ****

OV Alarm Pickup

| ****

Volts

| ****

Word

| ****

HR

| Register added in v2.0.19.

Note 15

7144

| ****

OV Alarm Delay

| ****

sec

| ****

Word

| ****

HR

| Register added in v2.0.19.

Note 15

7145| Reserved| | | |
7146| Sluggish Breaker Detect Threshold| msec| Word| HR|

7147-7148| Future| N/A| Word| HR|
7149| Limit Switch Type (setting):

0 = None (no contact wired in)

1 = 52a (contact open when breaker open) 2 = 52b (contact closed when breaker open)

| N/A| Word| HR|

7150

| Power Flow Direction Setting 0 = Normal

1 = Reverse

| ****

N/A

| ****

Word

| ****

HR

|

7151

| Programmable Relay: Bit 0 – 3: Relay #1

Bit 4 – 7: Relay #2

0 = Alarm

1 = Zone Block

2 = Close Breaker 3 = Off

4 – 15 = Undefined

Bit 8 – 15: Future

| ****

N/A

| ****

Word

| ****

HR

| Register added in v4.0

7152

| Zone Block:

Bit 0: Relay #1 ST

Bit 1: Relay # 1 INST

Bit 2: Relay #1 GF

Bit 3: Future

Bit 4: Relay #2 ST

Bit 5: Relay #2 INST

Bit 6: Relay #2 GF

Bit 7: Future

Bit 8 – 15: Future

| ****

N/A

| ****

Word

| ****

HR

7158

| Phase Current Unbalanced Enabled 2 = Trip, 1 = On, 0 = Off| ****

N/A

| ****

Word

| ****

HR

| Register added in v4.0

7159

| ****

User Settings Change Request:

0 = OK;

1 = Out-Of-Range: No changes made

See Register 7159 notes at the end of this table

| ****

N/A

| ****

Word

| ****

IR

|
---|---|---|---|---|---
7160| Last Settings Change: Hrs MS, mins LS| N/A| Word| IR|
7161| Last Settings Change: secs MS, month LS| N/A| Word| IR|
7162| Last Settings Change: day MS, year LS| N/A| Word| IR|

7163

| Last Settings Changed Via: Bits 0 – 4:

0 = Uncommishioned 1 = Local Display

2 = InfoPro AC

3 = Bluetooth (future) 4 = Modbus RS-485

5 = URC Utility (future)

6 = Network GUI (future) 7 = Future

8 = Future

9 = Unidentified

| ****

N/A

| ****

Word

| ****

IR

|
7164| Unbalance Percent| N/A| Word| IR|

7165 – 7199| Reserved| N/A| N/A| N/A|
| | | | |
| See separate table below for trips #2 through 8| | | |
| | | | | Added trip types in
| Trip #1 Type| | | | v2.0.19.0
7200| | N/A| Word| IR| Note 15
| Bits 0-4| | | |
| | | | | Bit 0 – 4 value 18, 20 –
| 0 = No Last Trip| | | | 21, 27 and Bit 6 – 15
| | | | | added in v4.0
| 1 = I (Instantaneous)| | | |
| 2 = ST| | | |
| 3 = LT| | | |
| 4 = GF| | | |
| 5 = QT-I| | | |
| 6 = QT-GF| | | |
| 7 = I-OVRD| | | |
| 8 = I-CLOS| | | |
| 9 = FUTURE (Remote Trip)| | | |
| 10 = FUTURE (Actuator Test – URC Internal)| | | |
| 11 = NOL| | | |
| 12 = FUTURE| | | |
| 13 = UV| | | |
| 14 = OV| | | |
| 15–16 = FUTURE| | | |
| 17 = FUTURE| | | |
| 18 = Phase U/B| | | |
| 19 = Phase Loss/Reverse| | | |
| 20 = GF Test| | | |
| 21 = Reverse Power| | | |
| 22 = Forced Trip Thru Communications| | | |
| 23 = SAFE-T-TRIP| | | |
| *24-25 = FUTURE| | | |
| 26 = GF Test Trip| | | |
| 27 = Neutral Protection| | | |
| 28 = Future| | | |
| 29 = Future| | | |
| 30 = Future| | | |
| 31 = Future| | | |
| Bit 5: 0 (not used)| | | |
| Bit 6: 1= Last Trip; 0 = not Last Trip| | | |
| Bit 7: Future| | | |
| Bit 8: Invalid Phase Current| | | |
| Bit 9: Invalid Neutral Current| | | |
| Bit 10: High Phase Current| | | |
| Bit 11: High Neutral Current| | | |
| Bit 12: Sluggish Breaker| | | |
| Bit 13: Stuck Breaker| | | |
| Bit 14: QT Switch ON| | | |
| Bit 15: Detected Reversed CT

See Note 16b for additional trip data info/status

| | | |
---|---|---|---|---|---
7201| Trip #1 Trip Time: hrs (24-hr) MS, mins LS| N/A| Word| IR|
7202| Trip #1 Trip Time: secs MS, month LS| N/A| Word| IR|
7203| Trip #1 Trip Time: day MS, year (0-99) LS| N/A| Word| IR|
7204| Trip #1 Current Phase A| Amps| Word| IR|
7205| Trip #1 Current Phase B| Amps| Word| IR|
7206| Trip #1 Current Phase C| Amps| Word| IR|
7207| Trip #1 Current N| Amps| Word| IR|
7208| Trip #1 Current GF| Amps| Word| IR|
7209| Trip #1 Voltage A-N| Volts| Word| IR|
7210| Trip #1 Voltage B-N| Volts| Word| IR|
7211| Trip #1 Voltage C-N| Volts| Word| IR|
7212| Trip #1 Voltage A-B| Volts| Word| IR| Added in v1.9. Note 14
7213| Trip #1 Voltage B-C| Volts| Word| IR| Added in v1.9. Note 14
7214| Trip #1 Voltage C-A| Volts| Word| IR| Added in v1.9. Note 14

7215

| ****

Trip #1 Breaker Mechanism Time Phase A

| msec x 10| ****

Word

| ****

IR

|

7216

| ****

Trip #1 Breaker Mechanism Time Phase B

| msec x 10| ****

Word

| ****

IR

|

7217

| ****

Trip #1 Breaker Mechanism Time Phase C

| msec x

10

| ****

Word

| ****

IR

|

7218

| ****

Trip #1 Negative Sequence Over Voltage (NSOV)

| ****

%

| ****

Word

| ****

IR

| Register added in v2.0.19.0

Note 15

7219| Future| | | |
| | | | |

7220 – 7359

| ****

See separate table below for trips #2 through 8

| | | |
7360| Trip Count I (Instantaneous)| N/A| Word| IR|
7361| Trip Count ST| N/A| Word| IR|
7362| Trip Count LT| N/A| Word| IR|
7363| Trip Count GF| N/A| Word| IR|
7364| Trip Count QT-I| N/A| Word| IR|
7365| Trip Count QT-GF| N/A| Word| IR|
7366| Trip Count I-OVRD| N/A| Word| IR|
7367| Trip Count I-CLOS| N/A| Word| IR|
7368| Trip Count UB| N/A| Word| IR| Added in v4.0
7369| Trip Count NP| N/A| Word| IR| Added in v4.0
7370| Trip Count NOL| N/A| Word| IR|

7371| Trip Count Future| N/A| Word| IR|
7372| Trip Count UV| N/A| Word| IR|
7373| Trip Count OV| N/A| Word| IR|
7374| Trip Count FUTURE| N/A| Word| IR|
7375| Trip Count FUTURE| N/A| Word| IR|
7376| Trip Count FUTURE| N/A| Word| IR|
7377| Trip Count FUTURE| N/A| Word| IR|

7378

| ****

Trip Count Phase Loss / Reverse

| ****

N/A

| ****

Word

| ****

IR

| Register added in v2.0.19.0

Note 15

7379| Trip Count (FUTURE)| N/A| Word| IR|
7380| Trip Count Reverse Power| N/A| Word| IR| Added in v4.0
7381| Trip Count Forced Thru Communications| N/A| Word| IR|
7382| Trip Count SAFE-T-TRIP| N/A| Word| IR|
7383| Sluggish or Stuck Breaker Occurrences| N/A| Word| IR|
7384| Trip Count GF Test| N/A| Word| IR| Added in v4.0
7385 – 7399| Reserved| N/A| N/A| N/A|
7400-7409| URC Internal Trip History| N/A| Word| IR| Registers added in v4.0
| | | | |
---|---|---|---|---|---

7410 – 7479

| See separate table below for trips #2 through 8 (7410 – 7479 are URC internal)| | | |

7480 – 7899| Reserved| N/A| N/A| N/A|
| | | | |
7900| Power Demand Period| sec| Word| HR| Register added in v4.0
7901| Last KWD| KW| Word| IR| ****

Register added in v4.0

7902| Last KVAD| KVA| Word| IR
7903| Peak KWD| KW| Word| IR
7904| Peak KVAD| KVA| Word| IR
7905| Demand Period| sec| Word| IR
7906| Service Reminder Year| N/A| Word| HR| Register added in v4.0 Must read address 7906 and length of 3 words
7907| Service Reminder Month| N/A| Word| HR
7908| Service Reminder Day| N/A| Word| HR
7910 – 7925| Service Reminder Company Name| N/A| 16 Words| HR| Register added in v4.0 Must read address 7910 and length of 32 words
7926 – 7941| Service Reminder Contact Information| N/A| 16 Words| HR

7942 – 7979| Reserved| N/A| N/A| N/A|
| | | | |
7980 – 7999| URC Internal| N/A| 34 Words| IR| Register added in v4.0
8000 – 8999| Reserved| N/A| N/A| N/A|
9000| URC Internal| N/A| 1-n Words| IR| Register added in v4.0
9500| URC Internal| N/A| 1-n Words| IR| Register added in v4.0
9990| Time/Date Binary Year (21 – 99)| N/A| Word| HR| ****

Register added in v4.0 Must read address 9900 and length of 6 words

9991| Time/Date Binary Month (1 – 12)| N/A| Word| HR
9992| Time/Date Binary Day (1 – 31)| N/A| Word| HR
9993| Time/Date Binary Hour (0 – 23)| N/A| Word| HR
9994| Time/Date Binary Minute (0 – 59)| N/A| Word| HR
9995| Time/Date Binary Second (0 – 59)| N/A| Word| HR
9996| URC Internal| N/A| 52 Words| IR| Register added in v4.0
9997| URC Internal| N/A| 18 Words| IR| Register added in v4.0
9998| URC Internal| N/A| 64 Words| IR| Register added in v4.0

future release (Returns a value of 0 when read) Register addresses 7091 – 7099, 7164-7199, 7385-7399, 7480-7899, 7942-7979, 7989-7996, and 8000-8999 are reserved – do not access, results are undefined

Trip History: Registers for Trips #1 through #8

Description| Trip #1| Trip #2| Trip #3| Trip #4| Trip #5| Trip #6| Trip #7| Trip #8
---|---|---|---|---|---|---|---|---
Trip Type /Info| 7200| 7220| 7240| 7260| 7280| 7300| 7320| 7340
Trip Time: hrs (24-hr) MS, mins LS| 7201| 7221| 7241| 7261| 7281| 7301| 7321| 7341
Trip Time: secs MS, month LS| 7202| 7222| 7242| 7262| 7282| 7302| 7322| 7342
Trip Time: day MS, year (0-99) LS| 7203| 7223| 7243| 7263| 7283| 7303| 7323| 7343
Current Phase A| 7204| 7224| 7244| 7264| 7284| 7304| 7324| 7344
Current Phase B| 7205| 7225| 7245| 7265| 7285| 7305| 7325| 7345
Current Phase C| 7206| 7226| 7246| 7266| 7286| 7306| 7326| 7346
Current N| 7207| 7227| 7247| 7267| 7287| 7307| 7327| 7347
Current GF| 7208| 7228| 7248| 7268| 7288| 7308| 7328| 7348
Voltage A-N| 7209| 7229| 7249| 7269| 7289| 7309| 7329| 7349
Voltage B-N| 7210| 7230| 7250| 7270| 7290| 7310| 7330| 7350
Voltage C-N| 7211| 7231| 7251| 7271| 7291| 7311| 7331| 7351
Voltage A-B| 7212| 7232| 7252| 7272| 7292| 7312| 7332| 7352
Voltage B-C| 7213| 7233| 7253| 7273| 7293| 7313| 7333| 7353
Voltage C-A| 7214| 7234| 7254| 7274| 7294| 7314| 7334| 7354
Breaker Mechanism Time Phase A| 7215| 7235| 7255| 7275| 7295| 7315| 7335| 7355
Breaker Mechanism Time Phase B| 7216| 7236| 7256| 7276| 7296| 7316| 7336| 7356
Breaker Mechanism Time Phase C| 7217| 7237| 7257| 7277| 7297| 7317| 7337| 7357
Negative Sequence Over Voltage (NSOV)| ****

7218

| ****

7238

| ****

7258

| ****

7278

| ****

7298

| ****

7318

| ****

7338

| ****

7358

Future| 7219| 7239| 7259| 7279| 7299| 7319| 7339| 7359

AC-PRO-II backwards compatible registers

If the AC-PRO-II is installed as a direct replacement of an existing communicating AC-PRO trip unit, the same communications registers can be used to maintain the existing AC-PRO communications capabilities. Note: These registers do not address features and information that is unique to AC-PRO-II. To utilize and communicate all information from AC-PRO-II, see Table A, and the AC-PRO-II Instruction Manual. AC-PRO-II: Registers 83 – 324 are “backwards” compatible with existing AC-PRO registers

Data Types

OC = Output Coil (write only)
IR = Information Register (read only)
HR = Holding Register (read/write) * = future

Table B: AC-PRO-II backwards compatible registers

Item Register Address| Description (Data Point Name)| Unit| Size| Data Type|
---|---|---|---|---|---
83| Force Reset| N/A| Word| OC|
84| Force Trip| N/A| Word| OC|
86| Force Clear Last Trip Data| N/A| Word| OC|
111| Force Clear KW-Hrs| N/A| Word| OC|
112| Force Relay 1 (on for 100mS)| N/A| Word| OC|
113| Force Relay 2 (on for 100mS)| N/A| Word| OC|
256| Current Phase A| Amps| Word| IR| Note 11
257| Current Phase B| Amps| Word| IR| Note 11
258| Current Phase C| Amps| Word| IR| Note 11

259

| ****

Current GF

| ****

Amps

| ****

Word

| ****

IR

| V1.1-1.6: unscaled V1.7 and later: scaled Note 13
260| Current UB| %| Word| IR|
262| Voltage AN| Volts| Word| IR|
263| Voltage BN| Volts| Word| IR|
264| Voltage CN| Volts| Word| IR|
265| Voltage AB| Volts| Word| IR|
266| Voltage BC| Volts| Word| IR|
267| Voltage CA| Volts| Word| IR|
268| KW Phase A| kW| Word| IR| Note 11
269| KW Phase B| kW| Word| IR| Note 11
270| KW Phase C| kW| Word| IR| Note 11
271| KVA Phase A| kVA| Word| IR| Note 11
272| KVA Phase B| kVA| Word| IR| Note 11
273| KVA Phase C| kVA| Word| IR| Note 11

274

| ****

KW-Hrs Register 3

| 0.1 KWH

232

| ****

Word

| ****

IR

|

275

| ****

KW-Hrs Register 2

| 0.1 KWH

216

| ****

Word

| ****

IR

|
276| KW-Hrs Register 1| 0.1 KWH| Word| IR|
277| KW Signs & Lead/Lag PF

*Bit 0; Phase A, 1 = Lead PF, 0 = Lag PF

*Bit 1; Phase B, 1 = Lead PF, 0 = Lag PF

*Bit 2; Phase C, 1 = Lead PF, 0 = Lag PF Bit 8; Phase A KW, 1 = Pos, 0 = Neg

Bit 9; Phase B KW, 1 = Pos, 0 = Neg Bit 10; Phase C KW, 1 = Pos, 0 = Neg

Bit 11; KW-Hrs, 1 = Pos, 0 = Neg

| N/A| Word| IR|
Item Register Address| Description (Data Point Name)| Unit| Size| Data Type|
---|---|---|---|---|---
278| Alarm Code

Bit 0; 1 = Trip Output

Bit 1; 1 = Current > LT Pickup Bit 3; 1 = Actuator Disconnected

Bit 4; 1 = Memory Error

Bit 6; 1 = A/D Error

| N/A| Word| IR|
Bit 8; 1 = Breaker Closed, 0 = Breaker Open or Feature Unused
Bit 9; 1 = Times 10 Range

Bit 11; 1 = Divide by 10 Range

| |
279| CT Rating| Amps| Word| HR|
280| LT Pickup| Amps| Word| HR|
281| LT Delay

Value stored is 2 times the actual delay in seconds

| Sec.| Word| HR|
282| ST Pickup| Amps| Word| HR|
283| ST Delay

Binary 0 =. 07 Sec Delay Band Binary 1 = .10 Sec Delay Band Binary 2 = .15 Sec Delay Band Binary 3 = .20 Sec Delay Band Binary 4 = .30 Sec Delay Band

Binary 5 = .40 Sec Delay Band

| Sec.| Word| HR|
284| ST I2 T

Bit 0; 0 = Off, 1 =On

| N/A| Word| HR|
285| I Pickup| Amps| Word| HR|
286| GF Pickup| Amps| Word| HR|
287| GF Delay

Binary 0 = .10 Sec Delay Band Binary 1 = .20 Sec Delay Band Binary 2 = .30 Sec Delay Band Binary 3 = .40 Sec Delay Band

Binary 4 = .50 Sec Delay Band

| Sec.| Word| HR|
288| GF I2 T

Bit 0; 0 = Off, 1 = On

| N/A| Word| HR|
289| U/B Pickup| %| Word| HR|
290| U/B Delay| Sec.| Word| HR|
291| Trip Unit Address| N/A| Word| IR|
292| Reply Delay| mS| Word| IR|
293| Last Trip Current Phase A| Amps| Word| IR|
294| Last Trip Current Phase B| Amps| Word| IR|
295| Last Trip Current Phase C| Amps| Word| IR|
296| Last Trip Current GF| Amps| Word| IR|
297| Last Trip Current U/B| %| Word| IR|
298| Last Trip Code

Binary 65535 = No Last Trip Binary 0 = Instantaneous Binary 1 = LT

Binary 2 = ST Binary 3 = GF

(Binary 4 = Unbalanced . does not apply to

AC-PRO-II)

Binary 5 = Forced Trip via Communications

Binary 6 = Close Fault Binary 7 = QT Ground Fault Binary 8 = QT Instantaneous

Binary 9 = FUTURE

| N/A| Word| IR|

298

(continued)

| ****

* Binary 10 = FUTURE

Binary 11 = I-Override Binary 12 = NOL

* Binary 13 = Under Current (FUTURE) Binary 14 = UV

Binary 15 = OV

* Binary 16 = UF

* Binary 17 = OF

* Binary 18 = REV-PCT

* Binary 19 = REV-NCT

* Binary 20 = Phase Loss

* Binary 21 = Phase ROT

* Binary 22 = REV-PWR Binary 23 = N/A

Binary 24 = SAFE-T-TRIP

| | | |
---|---|---|---|---|---
| | | | |
299| Trip Count Instantaneous| N/A| Word| IR|
300| Trip Count LT| N/A| Word| IR|
301| Trip Count ST| N/A| Word| IR|
302| Trip Count GF| N/A| Word| IR|
303| Trip Count U/B| N/A| Word| IR|
304| Trip Count Forced| N/A| Word| IR|
305| Trip Count Close Fault| N/A| Word| IR|
306| Trip Unit Serial Number Byte 0| N/A| Word| IR|
307| Trip Unit Serial Number Byte 1| N/A| Word| IR|
308| Trip Unit Serial Number Byte 2| N/A| Word| IR|
309| Trip Unit Serial Number Byte 3| N/A| Word| IR|
310| Trip Unit Serial Number Byte 4| N/A| Word| IR|
311| Trip Unit Serial Number Byte 5| N/A| Word| IR|
312| Trip Unit Serial Number Byte 6| N/A| Word| IR|
316| Range Multiplier 0-X1

1-X10

2-X0.1

| N/A| Word| IR|
317| Quick-Trip GF Pickup| Amp| Word| HR|
318| Quick-Trip Instantaneous Pickup| Amp| Word| HR|
319| KWH MS| KWH| Word| IR|
320| KWH LS| KWH| Word| IR|
321| Trip Count Quick-Trip GF| N/A| Word| IR|
322| Trip Count Quick-Trip Instantaneous| N/A| Word| IR|
323| Thermal Memory, 0 = Off, 1 = On| N/A| Word| HR|
324| QT-Switch, 0 = Off, 1 = On| N/A| Word| IR|

Modbus Register Notes

If “Pickup” setting register = 0, the function is disabled.
If Trip History current = 65535A, AC-PRO-II determined RMS current(s) were greater than 12x CT rating, indicating CT saturation is possible, making RMS current readings inaccurate.
In Trip History, for Instantaneous trips: If all three phase currents are equal and not greater than 12x CT rating, then the trip occurred too rapidly for the AC-PRO-II to determine accurate current(s). In this case, the three currents reported over Communications will be equal to the Instantaneous or Quick-Trip Instantaneous pickup, whichever was the trip type.
See notes in Tables for multipliers. Some of the registers where multipliers apply are: 7114, 7115, all breaker Mechanism times (i.e. 7215), ETC.
Register 7159 : If an error occurs when attempting to change settings using Communications, the following error codes will be returned, indicating the related reasons

Setting that was out of range Error Code

CT_RATING 2000
CT_SECONDARY 2001
CT_NEUTRAL_SEC 2002
FREQUENCY 2003
BKR_POS_CNT_TYPE 2004
POWER_DIRECTION 2005
AUTO_POLARITY_CT 2006
ROGOWSKI_COIL_SENSITIVITY 2007
ROGOWSKI_COIL_SENSOR_TYPE 2008
LT_ENABLED 2010
LT_PICKUP 2011
LT_DELAY 2012
LT_THERM_MEM 2013
ST_ENABLED 2014
ST_PICKUP 2015
ST_DELAY 2016
ST_I2T 2017
GF_TYPE 2018
GF_PICKUP 2019
GF_DELAY 2020
GF_SLOPE 2021
GF_QT_TYPE 2022
GF_QT_PICKUP 2023
QT_INST_PICKUP 2024
INSTANT_ENABLED 2025
INSTANT_PICKUP 2026
NOL_ENABLED 2027
NOL_PICKUP 2028
NOL_DELAY 2029
NOL_THERM_MEM 2030
UV_TRIP_ENABLED 2031
UV_PICKUP 2032
UV_DELAY 2033
OV_TRIP_ENABLED 2034
OV_PICKUP 2035
OV_DELAY 2036
PV_LOSS_ENABLED 2037
PV_LOSS_DELAY 2038
NSOV_PICKUP_PERCENT 2039
SB_THRESHOLD 2043
FORCED_TRIP_ENABLED 2044
REMOTE_ENABLED 2045
POWER_REVERSED 2046
ALARM_RELAY_TU 2047
ALARM_RELAY_RIU1 2048
ALARM_RELAY_RIU2 2049
QT_SWITCH_ENABLED 2052
UB_ENABLED 2053
UB_PICKUP 2054
UB_DELAY 2055
DATE_FORMAT 2056
SAFE_T_CLOSE 2057
PROGRAMMABLE_RELAY 2058
ZONE_BLOCK 2059
LANGUAGE 2060
NEUTRAL_PROTECTION 2061
THRESHOLD_PHASE_CT 2062
THRESHOLD_NEUTRAL_CT 2063

Permission for Forced Trip Over Communications and Settings Changes Over Communications must be set at the trip unit. “Settings Changes Over Communications” does NOT need to be enabled to allow writing to the System Time registers. (See note 9 below).
KW-hours and KVA-hours max value is 99,999,999. These energy counters rollover to zero after this value is exceeded.
If a voltage, current, or power value is “Low”, then the respective register will read zero (0). Refer to the AC-PRO-II Instruction manual for “LOW” values criteria.
System clock:
a. Writing date time setting registers in v1.1 – v1.6 needed to be done in HEX.
b. Reading all date time registers in v1.1 – v1.6 done in BCD
c. Writing and Reading all date/time registers in v1.7 and later in BCD.
System time registers notes and examples: each of the 6 bytes are coded as HEX. That is, if it is October 16 then DAY=
0x16 and MONTH= 0x10. So register values for 12:30:57 on October 16, 2015 would be:
7107 = 0x1230
7108 = 0x5710
7109 x1615
Unless noted otherwise, words are 16-bit unsigned integers. The “high byte” (most significant) is transmitted first.
When the CT Rating is set to 200A and below, or 5250A and above, some registers are scaled (divided or multiplied by 10). For range (scaling) adjustments, see register 7103, bits 0, 1, and 2. The registers affected by this scaling are the Currents, all settings Pickups, Trip History Currents, Total Power (KW & KVA). (see Note 14 regarding Neutral and GF currents).
Voltage readings: a. If register value = 0, then measured voltage is “LOW” (less than 90V line-to-line). b. If register value = 65535, then AC-PRO-II could not determine/measure the voltage. 13.
Scaling of Neutral and GF currents. Firmware V1.1-1.6 : Neutral and GF currents were unscaled. Firmware V1.7 and later : Neutral and GF currents are scaled similar to phase currents (refer to note 11 above).
Firmware version 1.9 affected the following registers: a. Line-to-Line voltage registers were added (made active) in v1.9. b. Added GF I5t slope in v1.9.
Firmware version 2.0.19 added or affected these registers. Firmware version 2 added the following: a. Added Phase Loss / Reverse Protection feature b. Added “Test Mode” for testing convenience. c. Added Line-to-Line Voltage measurement, and removed Line-to-Neutral voltages (for AC-PRO-II with Voltage Divider Module). d. Improved UnderVoltage protection e. OverVoltage and UnderVoltage now have dedicated pickup settings and delay settings for both Trip and Alarm features. i. Versions 1.1-1.9: Registers 7135, 7136, 7141, 7142 were used for trip OR alarm settings, because either trip OR alarm could be enabled. ii. Version 2: Trip and Alarm functions now have dedicated registers. f. Added Ground Fault Alarm feature g. Added Ground Fault Test trip function h. Phase Loss / Reverse feature and improved UnderVoltage require AC-PRO-II with VDM rev 2 hardware (‘backfed VDM’), which is present in AC-PRO-II with VDM units shipped 2016 & later i. Added bits 7 and 8 to register 7029 in v2.0.
Firmware version 2.0.40 affected these registers
a. Added commissioned status register 7163
b. Added Frequency reading register 7069
c. Added Negative Sequence OV register 7070.
Firmware version 4.0.65 affected these registers.
a. 7006
b. 7008-7010
c. 7012
d. 7029-7031
e. 7040
f. 7041
g. 7071
h. 7077-7087
i. 7090
j. 7103
k. 7110
l. 7124
m. 7151-7158
n. 7200
o. 7368
p. 7369
q. 7380
r. 7384
s. 7400-7409
t. 7900-7941
Registers 7072-7076 are for current readings for special use only. Currents values are provided down to 2% of CT rating. Use caution when using readings below 10% of CT rating, as accuracy is not guaranteed, and these readings may not be accurate.

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