REZNOR 633be0bf27fe1 Signal Pro Control Instruction Manual

: June 9, 2024
: Reznor

Table of Contents

REZNOR 633be0bf27fe1 Signal Pro Control
CONFIGURATION
MODBUS ADDRESS
MODBUS FUNCTION CODES SUPPORTED
ELECTRIC AIR CURTAIN REGISTERS
ELECTRIC AIR CURTAIN COILS
LPHW AIR CURTAIN REGISTERS
LPHW AIR CURTAIN COILS
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

REZNOR 633be0bf27fe1 Signal Pro Control

Please read this document carefully before commencing installation, commissioning and/or servicing. Leave it with the end user/site agent to be placed in their premises technical file after installation.

WARNING
Improper installation, adjustment, alteration, service or maintenance can cause property damage, injury or death. All work must be carried out by appropriately qualified persons.

The manufacturer does not take any responsibility in the event of non- observance of the regulations concerning the connection of the apparatus causing a dangerous operation possibly resulting in damage to the apparatus and/or environment in which the unit is installed.

CONFIGURATION

The Modbus hardware is configured as follows:

RS485 serial half-duplex interface
9600 baud
8 bits
Even/No parity, see below
1 start bit
1 stop bit
RTU mode

Parity:

Signal Pro DIP switch address 0 to 7 use even parity
Signal Pro Dip switch address 8 to 15 use no parity

MODBUS ADDRESS

Units will respond to their own coded address set by the bit switches as follows:

Signal Pro Dip Switch	Modbus Address
0	16
1	17
2	18
3	19
4	20
5	21
6	22
7	23
8	24
9	25
10	26
11	27
12	28
13	29
14	30
15	31

They will also respond to broadcast write functions sent to Modbus address 0. They will not reply to broadcast read functions.

MODBUS FUNCTION CODES SUPPORTED

Code	Description
01 and 02	Read coils/inputs
03 and 04	Read holding / input registers
05	Write single coil
06	Write single register

All other Modbus function codes will generate exception code 01, function not recognized. Likewise, if coils/register addresses which are out of range are read from or written to either the command will be ignored or an exception code will be returned.

ELECTRIC AIR CURTAIN REGISTERS

Note: the register addresses below are as they would appear as raw data on the Modbus connection.

120	PCB Temp	Read Only

Returns the PCB temp in °C, range 0 to 100 in decimal
| |
121| Air Curtain Output Temp| Read Only
Returns the air curtain outlet temp in °C, range 0 to 100 in decimal
| |
122| External / Outdoor Temp| Read Only
Returns the external sensor air temp in °C, range -20 to +60, signed hex. Examples: 0xFFF6 is -10°C, 0x0000 is 0°C, 0x000A is 10°C
| |
123| Heater Element Duty Cycle| Read Only
Returns the heater element duty cycle as a number in range 0 to 255
| |
124| Door Open Set Temp| Read / Write
Sets or returns the door open target air curtain outlet air temp in range 0 or 5 to 50, where 0 is heater off and 5 to 50 is in °C decimal.
| |
125| Door Open Set Temp| Read / Write
Sets or returns the door closed target air curtain outlet air temp in range 0 or 5 to 50, where 0 is heater off and 5 to 50 is in °C decimal.
| |
126| Hours Run| Read Only
Returns the air curtain hours run with the fan on. Range is 0 to 65535 hours.

ELECTRIC AIR CURTAIN COILS

Note: the coil addresses below are as they would appear as raw data on the Modbus connection.

0	Fan 1 (Slow) On	Read only
1	Fan 2 (Medium) On	Read only
2	Fan 3 (Fast) On	Read only

0 – Input Closed (Door Open) or 1 – Input Open Circuit (Door Closed)

| |
7| Heat ON Status| Read only
Returns heater on status, 0 – Heater Off or 1 – Heater On

This is not the element status which depends on other inputs and settings

| |
8| Control Temperature Sensor Fault| Read only
Returns control temperature sensor fault status, 0 – No Fault or 1 – Fault

This shows that the sensor is outside its normal range, either open circuit, shorted or bad.

| |
9| PCB Temperature Sensor Fault| Read Only
Returns PCB temperature sensor fault status, 0 – No Fault or 1 – Fault

This shows that the sensor is outside its normal range, either missing, shorted or bad.

| |
10| External Temperature Sensor Fault| Read Only
Returns external temperature sensor fault status, 0 – No Fault Or 1 – Fault

This shows that the sensor is outside its normal range, either missing, shorted or bad. If the sensor has never been fitted this flag should be clear.

| |
11| External Temperature Sensor Not Fitted| Read Only
Returns external temperature sensor fitted status, 0 – Fitted Or 1 – Not Fitted
12| Set Door Open Fan Speed 1 (Slow)| Read / Write
---|---|---
13| Set Door Open Fan Speed 2 (Medium)| Read / Write
14| Set Door Open Fan Speed 3 (Fast)| Read / Write
Sets or returns door open fan speeds, 0 – fan set off or 1 – fan set on

Note: door open fan speed is set by the last write to any of coils 12, 13 or 14. Therefore if ‘write fan speed 1 set on’ is followed by ‘write fan speed 2 set off’ then the result will be fan speed is none.

When timer interlock is set on the control works as if the Timer input is open, no air curtain operation.

| |
18| Set Stat Interlock On| Read / Write
Sets or returns heater over temp thermostat interlock, 0 – set interlock off or 1 – set interlock on

When stat interlock is set on the control works as if the heater over temp thermostat input

is open, no heating fan forced to speed 3.

| |
19| Set Door Interlock On| Read / Write
Sets or returns door interlock, 0 – set interlock off or 1 – set interlock on

When door interlock is set on the control works as if the door input is open, i.e. as if door is closed.

Note: door closed fan speed is set by the last write to any of coils 20, 21 or 22. Therefore if ‘write fan speed 1 set on’ is followed by ‘write fan speed 2 set off’ then the result will be fan speed is none.

| |
23| Air Curtain Reset| Write Only
A write of any value to this coil will cause a microprocessor reset of the air curtain. There will be no response message.

LPHW AIR CURTAIN REGISTERS

Note: the register addresses below are as they would appear as raw data on the Modbus connection.

119	Return Pipe Temp	Read Only

LPHW AIR CURTAIN COILS

Note: the coil addresses below are as they would appear as raw data on the Modbus connection.

23	Air Curtain Reset	Write Only

This is not the valve status which depends on other inputs and settings.

| |
30| Flow Temperature Sensor Fault| Read Only
Returns flow temperature sensor fault status, 0 – no fault or 1 – fault.

This shows that the sensor is outside its normal range, either open circuit, shorted or bad.

| |
32| Door Input Open Circuit| Read Only
Returns door input status, 0 – input closed (door open) or 1 – input open circuit (door closed).
| |
33| Timer Input Open Circuit| Read Only
Returns Timer input status, 0 – input closed or 1 – input open circuit
| |
36| Filter Input Open Circuit| Read Only
Returns filter input status, 0 – input closed or 1 – input open circuit (fault)
| |
37| Ambient Air Curtain| Read Only
Returns ambient air curtain status, 0 air curtain is heated or 1 air curtain is ambient (i.e. no flow/return sensor fitted)
| |
38| External Temperature Sensor Fault| Read Only
Returns external temperature sensor fault status, 0 – no fault or 1 – fault.

This shows that the sensor is outside its normal range, either missing, shorted or bad. If the sensor has never been fitted this flag should be clear.

39	External Temperature Sensor Not Fitted	Read Only

Returns external temperature sensor fitted status, 0 – fitted or 1 – not fitted
| |
40| Return Temperature Sensor Fault| Read Only
Returns return temperature sensor fault status, 0 – no fault or 1 – fault.

This shows that the sensor is outside its normal range, either open circuit, shorted or bad.

Note: door open fan speed is set by the last write to any of coils 41, 42 or 43. Therefore if ‘write fan speed 1 set on’ is followed by ‘write fan speed 2 set off’ then the result will be fan speed is none.

When door interlock is set on the control works as if the door input is open, ie as if door is closed.

| |
49| Set Timer Interlock On| Read / Write
Sets or returns timer interlock, 0 – set interlock off or 1 – set interlock on.

When timer interlock is set on the control works as if the Timer input is open, no air curtain operation.

| |
52| Set Filter Interlock On| Read / Write
Sets or returns filter interlock, 0 – set interlock off or 1 – set interlock on. When filter interlock is set on the control works as if the filter input is open.
| |
53| Set Door Closed Fan Speed 1 (Slow)| Read / Write
54| Set Door Closed Fan Speed 2 (Medium)| Read / Write
55| Set Door Closed Fan Speed 3 (Fast)| Read / Write
Sets or returns door closed fan speeds, 0 – fan set off or 1 – fan set on.

Note: door closed fan speed is set by the last write to any of coils 53, 54 or 55. Therefore if ‘write fan speed 1 set on’ is followed by ‘write fan speed 2 set off’ then the result will be fan speed is none.

NORTEK GLOBAL HVAC (UK) LTD
Fens Pool Avenue Brierley Hill
West Midlands DY5 1QA
United Kingdom
Tel 01384 489700
Fax 01384 489707
reznorsales@nortek.com
www.reznor.eu.

Nortek Global HVAC is a registered trademark of Nortek Global HVAC limited. Because of the continuous product innovation, Nortek Global HVAC reserves the right to change product specifications without due notice.