TotalSense AI31 BACnet Protocol User Guide

: June 1, 2024
: TotalSense

TotalSense AI31 BACnet Protocol

Product Information

Product Specifications:

Model Numbers: AI31, AI33, AI35, AI24, AI32, AI34, AV60, AV61, AV62, AV63, AV64, AV65
Inversion Options: 0 = Not Inverted, 1 = Inverted
AQI (Air Quality Index) Categories: CO2, VOC, PM, CO, O3
AQI Quality Levels: Poor quality, Good quality
Temperature Range: AQI Temp Range Low – AQI Temp Range High
Humidity Range: Low window threshold for good humidity quality High window threshold for good humidity quality

Product Usage Instructions

Air Quality Monitoring:

Use the device to monitor AQI levels for CO2, VOC, PM, CO, and O3.
Note the thresholds where each air quality category transitions from Poor to Good quality.

Temperature and Humidity Monitoring:

Check the temperature range displayed on the device for optimal comfort.
Monitor the humidity levels within the specified thresholds for good quality.

Inversion Settings:

Select the desired inversion option (0 = Not Inverted, 1 = Inverted) based on your preference.

Frequently Asked Questions (FAQ):

Q: How do I know when air quality is considered poor or good?
A: The device will display the AQI levels for different pollutants and indicate whether it falls under Poor quality or Good quality based on the specified thresholds.
Q: What should I do if the temperature or humidity levels are outside the recommended range?
A: Take necessary actions to adjust the temperature or humidity levels to fall within the specified thresholds for good quality.

154-0043-0F

Rev.	Release Date	By	Description of Change	ECR
0A		NAK	Initial Release	—
OB	9/23/2021	NJS	Adding system config points	—
oc	6/7/2022	NJS	Updates for engineering Cl release	—
OD	9/21/2022	NJS	Updates for CO and 03 release	—
OE	3/8/2023	NJS	Adding PB over cornms	—
OF	1/8/2024	NJS	Updates for new feature release	—

154-0042
TotalSense Display Navigation Guide

154-0044
TotalSense Modbus Protocol Guide

Protocol Implementation Conformance Statement

Date 5/13/2021
Vendor Name Senva Sensors
Product Name Total Sense Air Quality Sensor
Product Model Number AQ2W-XXXXXX (See catalog for model numbering)
Firmware Revision VSBHP 14.10
Application Software Version 1.2.x
BACnet Protocol Revision 14
Product Description Low Voltage Air Quality Sensor
BACnet Standardized Device Profile BACnet Application Specific Controller (B-ASC)
List of BACnet Interoperability DS-RP-8, DS-RPM-8, DS-WP-8,
- Building Blocks Supported DM-DDB-8, DM-DOB-8 DM-DCC-8, DM-RD-8
Segmentation Capability No Support
Standard Object Types Supported See the following. Optional implementations are marked.
Data Link Layer Options MS/TP Master
Device Address Binding No Support
Networking Options No Support
Character Sets Supported ISO 10646 (UTF-8)
Communications Gateway No Support
Network Security Options Non-Secure Device

Configuration

Congratulations on installing your new Senva BACnet TotalSense Series indoor air quality monitor! The BACnet Protocol Guide assumes the first stage of installation is complete, with the Total Sense connected to your local RS485 network and powered.

See “Total Sense Installation Manual” for setup.

Device information can be configured or referenced using the below table.

Property	Min/Max	Default	Read	Functionality

OBJECT_IDENTIFIER (DEVICE INSTANCE)

|

0/4194302

|

655xxx

|

R/W

| Set from factory to 655xxx where xxx is the last 3 digits of the serial number of the device.
OBJECT_NAME| N/A| Device Name| R/W| The device allocates 64 bytes for string values.
DESCRIPTION| N/A| Device Description| R/W| The device allocates 64 bytes for string values.

LOCATION

|

N/A

|

Device Location

|

R/W

| The device allocates 64 bytes for string values.
PROFILIE_NAME| N/A| 665-Device-

AQ2

| read

only

|
MODEL_NAME| N/A|

Varies

| read-only| Set from the factory to complete part number.
VENDOR_NAME| N/A| Senva Inc.| read-only|
APPLICATION_SOFTARE_VERSION| N/A| Varies| read-only| Set from the factory.
FlRMWARE_REVISION| N/A| VSBHP 14.10| read-only|
MAX_MASTER| 0/127| 127| R/W|
VENDORIDENTI FlER| 665| 665| read-only|
PROTOCOL VERSION| 1| 1| read-only|
PROTOCOL_REVISION| 14| 14| read

only

|

Trading

Register

| ****

Description

| ****

Min/Max

| ****

Units

| ****

Read

| ****

Functionality

---|---|---|---|---|---

All

| ****

Temperature

| ****

-40.0 I 122.0

| ****

°F/C

| read-only| Read current temperature. Units depend on the setting in AV2.

Al2

| ****

Relative humidity

| ****

0.0 I 100.0

| ****

%RH

| read-only| Read current relative humidity in.

Al3

| ****

CO2

| ****

0 I 10000

| ****

PPM

| read-only| Read current CO2 concentration in PPM.

Al4

| ****

TVOCug/m3

| ****

0 I 10000

| ****

µg/m3

| read-only| Read current TVOC reading in µg/m3. This value is compensated for ambient temperature and barometric pressure.

AIS

| ****

TVOCPPB

| ****

0 I 10000

| ****

PPB

| ****

read-only

| Read current TVOC reading in PPB. This value is compensated for ambient temperature and barometric pressure and assumes an average molecular weight of 46.069 g/mol for conversion, which is based on Ethanol. To adjust this value, see AV8 to adjust the scaling

factor.

Al6

| ****

PM 1.0ug/m3

| ****

0 I 1000.0

| ****

µg/m3

| read-only| Read the current concentration of particles sized 0.3-1.0 µg/m3.

Al?

| ****

PM2.5ug/m3

| ****

0 I 1000.0

| ****

µg/m3

| read-only| Read the current concentration of particles sized 0.3-2.5 µg/m3.

Al8

| ****

PM4.0ug/m3

| ****

0 I 1000.0

| ****

µg/m3

| read-only| Read the current concentration of particles sized 0.3-4.0 µg/m3.

Al9

| ****

PM 10.0 ug/m3

| ****

0 I 1000.0

| ****

µg/m3

| read-only| Read the current concentration of particles sized 0.3-10.0 µg/m3.

Al10

| ****

Air quality

| 0 = Good

1 = Fair

2 = Poor

| ****

no units

| read-only| Read current air quality status. See the “Air Quality Thresholds” section for more information.
All 1| Slider display| -40.0 I 122.0| °F/C| read-only| Read the current setpoint slider position. Minimum and maximum values for scaling can be set in AV9 and AV10 respectively. Units depend on the setting in Av2.

Al12

| ****

Occupancy

| 0=

Unoccupied 1 = Occupied

| ****

no units

| ****

read-only

| Read the current status of the PIR occupancy sensor. This value will stay occupied after a motion event for the period specified in AVl 2.
---|---|---|---|---|---

Al13

| ****

Ambient light

| ****

0 I 100

| foot candles| read-only| Read current ambient light value in foot candles.

Al14

| ****

Relay contacts state

| 0 = OPEN

1 = CLOSED

| ****

no units

| read-only| Read the current state of the setpoint relay. Relay settings can be adjusted in AVl 5-

AV20.

Al15

| ****

Dewpoint

| ****

-40.0 I 122.0

| ****

°F/C

| read-only| Read current dew point temperature. Units depend on the setting in AV2.

Al16

| ****

Pressure

| ****

0.00 I 35.44

| ****

inHg

| ****

read-only

| Read current barometric pressure in inHg. This reading is only available on

units that include either CO2 or VOE

sensors.

Al25

| PM0.5 Particle Count| ****

0/1000.0

| ****

/cm3

| read-only| Read Current counts for particle sizes 0.3 to 0.5.

Al26

| PM 1.0 Particle Count| ****

0/1000.0

| ****

/cm3

| read-only| Read Current counts for particle sizes 0.3 to 1.0.

Al27

| PM2.5 Particle Count| ****

0/1000.0

| ****

/cm3

| read-only| Read Current counts for particle sizes 0.3 to 2.5.

Al28

| PM4.0 Particle Count| ****

0/1000.0

| ****

/cm3

| read-only| Read Current counts for particle sizes 0.3 to 4.0.

Al29

| PM 10.0 Particle Count| ****

0/1000.0

| ****

/cm3

| Read-only| Read Current counts for particle sizes 0.3 to 10.0.

Al30

| PM Avg Particle Size| ****

0/10.00

| ****

um

| Read-only| Read the Current average size of the particle that the device has measured.

AI31

| ****

CO Reading

| ****

0/2000

| ****

ppm

| Read-only| ****

Read the Current CO readings

AI33

| ****

03 Reading

| ****

0/5000

| ****

ppb

| Read-only| ****

Read the Current O3(ozone) readings

AI35

| ****

User BTN Active State

| ****

0/1

| ****

No units

| ****

Read-only

| 0 = No button activity since the timeout period.

1= Button was pressed within the

timeout period.

Diagnostics

Register	Description	Min/Max	Read	Functionality

All 7

| ****

System status

| ****

0 I 255

| ****

read-only

| 0x01 = EEPROM hardware fault (Consult factory) 0x02 = EEPROM data corruption (Consult factory) 0x04 = EEPROM write error (Consult factory)

0x08 = Device is currently using factory defaults (Consult factory)

0xl 0 = Sensor error (see individual sensor status for more info). Balded statuses will trigger this error.

Al18

| Temp sensor status| ****

0 I 255

| read-only| 0x01 = Sensor hardware fault (Consult factory)

0x02 = Sensor Data error (Consult factory)

Al19

| RH sensor status| ****

0 I 255

| read-only| 0x01 = Sensor hardware fault (Consult factory)

0x02 = Sensor Data error (Consult factory)

Al20

| ****

CO2 sensor status

| ****

0 I 255

| ****

read-only

| 0x01 = Sensor hardware fault (Consult factory) 0x02 = Sensor Data error (Consult factory) 0x04 = Sensor not ready (Consult factory)

0x40 = Temperature compensation not applied (No

action necessary. The default value of 25°C is used for temp compensation).

0x80 = Pressure compensation not applied (No action

necessary. A default value of 25°C is used for pressure

compensation.

Al21

| ****

TVOCsensor status

| ****

0 I 255

| ****

read-only

| 0x01 = Sensor hardware (I2C) fault (Consult factory)

0x02 = Sensor data error

0x04 = Sensor other hardware error

0x08 = Sensor not ready (training)

0xl 0 = Temperature compensation not applied 0x20 = Humidity compensation not applied

Al22

| ****

PM sensor status

| ****

0 I 255

| ****

read-only

| 0x01 = Sensor communication error (Consult factory)

0x02 = Sensor Data Error (Consult factory) 0x04 = Sensor not ready (Consult factory)

0x08 = Sensor fan speed warning (Consult factory) 0xl 0 = Sensor fan failure (Consult factory)

0x20 = Sensor laser failure (Consult factory)

Al23

| Pressure sensor status| ****

0 I 255

| read-only| 0x01 = Sensor hardware fault (Consult factory)

0x02 = Sensor Data error (Consult factory) 0x04 = Sensor not ready (Consult factory)

AI24

| PIO Output Power| ****

0.0/100.0%

| read-only| ****

Read the current output percentage of the PID output.

AI32

| ****

CO Status

| ****

0/255

| ****

R

| 0x01 = Sensor communication error (Consult factory)

0x02 = Sensor Data Error (Consult factory) 0x04 = Sensor Error

0x08 = Sensor not ready (Consult factory) 0xl 0 = Sensor End of Life

0x20 = Calibration Expired

0x40 = Temperature compensation not applied

AI34

| ****

03 Status

| ****

0/255

| ****

R

| 0x01 = Sensor communication error (Consult factory)

0x02 = Sensor Data Error (Consult factory) 0x04 = Sensor Error

0x08 = Sensor not ready (Consult factory)

0xl 0 = Temperature compensation not applied 0x02 = Humidity compensation not applied

---|---|---|---|---

Settings

Register

| ****

Description

| ****

Min/Max

| ****

Units

| ****

Default Value

| ****

Read

| ****

Functionality

---|---|---|---|---|---|---

AV1

| ****

Temp Offset

| ****

-9/9

| ****

OF

| ****

0

| ****

R/W

| ****

Adjust Treading by up to 9°F (or 5°C).

AV2

| ****

Temp Unit

| ****

0=F

l=C

| ****

No units

| ****

0

| ****

R/W

| Select whether the display shows degrees Fahrenheit or Celsius. This will also determine the scale of the reading in All.

AV3

| ****

RH Offset

| ****

-5.0/5.0

| ****

%RH

| ****

0

| ****

R/W

| ****

Adjust RH reading by up to 5%.

AV4

| ****

CO2 Offset

| ****

-250/250

| ****

PPM

| ****

0

| ****

R/W

| ****

Offset CO2 reading by ±250 PPM.

AVS

| ****

CO2 auto cal enable

| ****

0=disabled l=enabled

| ****

None

| ****

1

| ****

R/W

| Enable or disable the ABC function for CO2 sensor calibration. It is not recommended to disable this unless you are using a dual-channel CO2

element.

AV6

| ****

CO2 Autocal Baseline

| ****

400 / 1499

| ****

PPM

| ****

400

| ****

R/W

| This sets the baseline value for the automatic baseline calibration. This should correspond to expected “unoccupied” levels of CO2.

AV7

| CO2 Autocal Period| ****

1 / 15

| ****

Days

| ****

14

| ****

R/W

| This sets the period for which ABC will calculate its unoccupied level and calibrate.

AV8

| ****

TVOCscale

| ****

0.000 I 10.000

| ****

No units

| ****

1.000

| ****

R/W

| This value can be used to adjust the TVOC reading. The standard readings are based on an Ethanol equivalent. See “TVOC Molecular Weights”

section for more information.

AV9

| ****

Slider display min

| ****

-40.0 I 122.0

| ****

°F/C

| ****

50

| ****

R/W

| The value is shown when the slider is at the lowest position for display purposes only. This will not affect the slider’s resistive output. This will also set the minimum value for the All 1 reading.

AV10

| ****

Slider display max

| ****

-40.0 I 122.0

| ****

°F/C

| ****

95

| ****

R/W

| The value is shown when the slider is at the highest position for display purposes only.

This will not affect the slider’s resistive output. This will also set the

maximum value for the All 1 reading.

AV11

| ****

PIR Motion event sensitivity

| ****

10 / 100

| ****

No units

| ****

80

| ****

R/W

| Sensor sensitivity can be adjusted from 0-100. The default of 80 achieves the specified distance and degree. If nuisance triggers occur or a further sensing distance is required, this value can be decreased and increased accordingly. See the TotalSense Installation Manual for a visual representation of this

sensitivity value.

---|---|---|---|---|---|---

AV12

| ****

PIR Occupied delay

| ****

1 / 120

| ****

Minutes

| ****

10

| ****

R/W

| This is the number of minutes the occupancy state will remain active after each motion event is detected. This applies to the “occupancy” BACnet and Mod bus point as well as the output relay state if set to PIR in AV15.

AV13

| ****

PM clean interval

| ****

0 I 8760

| ****

hours

| ****

168

| ****

R/W

| Timed automatic clean cycle of PM element. To disable auto-clean, set to

AV14

| ****

PM command

| ****

0/2

| ****

no units

| ****

0

| ****

R/W

| Write 1 to execute the fan manual clean operation

Write 2 to execute the PM sensor reset

AV15

| ****

Relay source

| 0=None 1=(02

2=Humidity 3=Temp 4=TVOC µg/m3 S=PM

6=Occupancy

?=Air Quality 8=(0

9 = Ozone

| ****

no units

| ****

0

| ****

R/W

| ****

Which measurement will activate the setpoint relay?

AV16

| ****

Relay polarity

| ****

0=N.O.

1 =N.C.

| ****

no units

| ****

0

| ****

R/W

| An N.O. (normally open) relay will be in the open state until it is activated, i.e., the turn-on threshold is met, at which time it will close. An N.C. (normally closed) relay will be in the closed state until it is activated, at which

time it will open.

| | | | | | Based on the full-scale range of the selected sensor, set the value above which the relay will activate. For example, if CO2 is selected, its full available range is

0-10,000 PPM, so a setpoint of 800 PPM would

---|---|---|---|---|---|---
| | | | | | correspond to an 8.00% threshold setting. For temperature, the full range is -40 to 122°F, so a setpoint of 70°F would correspond to a threshold value of 68%. Use this equation to determine the threshold setting for a temp in °F: (T+40)/162*100.

This setting is ignored for PIR and G/F source

AV17

| Relay on threshold| ****

0.00 I 100.00

| ****

percent

| ****

varies

| ****

R/W

| | | Threshold| value| Threshold| value
CO2| 0-| 8.0%| 800 PPM| 7.0%| 700 PPM|
| | | | | | | 10,000| | | |
| | | | | | | PPM| | | |
| | | | | | RH| 0-| 60%| 60%RH| 55%| 55%RH|
| | | | | | | 100%| | | |
| | | | | | | RH| | | |
| | | | | | Temp*| -40-| 74%| 80°F| 73%| 78°F|
| | | | | | | 122 °F| | | |
| | | | | | TVOC| 0-| 4.0%| 400| 3.5%| 350|
| | | | | | | 10000| | µg/m3| | µg/m3
| | | | | | | µg/m3| | | |
| | | | | | co| 0-200| 50%| l00PPM| 40%| 80PPM|
| | | | | | | PPM| | | |
| | | | | | Ozone| 0-500| 20%| l00PPM| 16%| 80PPM|
| | | | | | | PPM| | | |

AV18

| ****

Relay off threshold

| ****

0.00 I 100.00

| ****

percent

| ****

Varies

| ****

R/W

| Based on the full scale range of the selected sensor, set the value below which the relay will de-activate. For example, to deactivate the relay when the CO2 setting reaches 790, set this threshold value to 7.90%. This

value must be set lower than the relay on the threshold.

AV19

| ****

Relay min on time

| ****

1 / 240

| ****

seconds

| ****

60

| ****

R/W

| When the relay activates, it will not deactivate until this time has lapsed, regardless of the turn-off setting. The relay will deactivate only when this time has

expired AND the turn-off threshold is met.

AV20

| ****

Relay min off time

| ****

1 / 240

| ****

seconds

| ****

60

| ****

R/W

| When the relay de-activates, it will not activate again until this time has lapsed, regardless of the turn-on setting. The relay will re-activate only when this time has expired AND the

turn-on threshold is met.

---|---|---|---|---|---|---

AV21

| ****

Display PM size

| 0 = 0.3-1.0

1 = 0.3-2.5

2 = 0.3-4.0

3 = 0.3-10.0

| ****

Micro- meters

| ****

1

| ****

R/W

| ****

Select which particulate size to show on display units.

AV22

| ****

Display center

| 0 = None

1 = Temperature

2 = Humidity

3 =CO2

4 = Air Quality 5 =TVOC µg/m3

6 =TVOC ppb 7=PM

8 = Temp Setpoint 9=CO

10=03

| ****

None

| ****

4

| ****

R/W

| Choose the value to show in the center of the OLEO display (Display models only). The below is an example of the Air Quality” setting. If PM is selected, the particle size displayed will depend on the setting in AV21.

AV23

| Display upper left| 0 = None

1 = Relay Icon

| ****

None

| ****

0

| ****

R/W

| Choose whether to show the relay state icon

on the top left of the OLEO display (Display models only).

AV24

| ****

Display upper right

| 0 = None

1 = Temperature

2 = Humidity

3 =CO2

5 = TVOC µg/m3 6 =TVOC ppb 7=PM

8 = Temp Setpoint 9=CO

10=03

| ****

None

| ****

1 or 0

| ****

R/W

| ****

Choose the value to show in the upper right of the OLEO display (Display models only). The default depends on whether the temperature element is included.

AV25

| ****

Display lower left

| 0 = None

1 = Temperature

2 = Humidity

3 =CO2

5 = TVOC µg/m3 6 =TVOC ppb 7=PM

8 = Temp Setpoint 9=CO

10=03

| ****

None

| ****

2 or 0

| ****

R/W

| Choose the value to show in the lower left of the OLEO display (Display models only).

The default depends on whether the humidity element is included.

AV26

| ****

Display lower right

| 0 = None

1 = Temperature

2 = Humidity

3 =CO2

5 =TVOC µg/m3

6 =TVOC ppb 7=PM

8 = Temp Setpoint 9=CO

10 =03

| ****

None

| ****

3 or 0

| ****

R/W

| ****

Choose the value to show in the lower right of the OLEO display (Display models only). The default depends on whether the CO2 element is included.

---|---|---|---|---|---|---

AV27

| AQRing brightness| ****

0 I 100

| ****

no units

| ****

100

| ****

R/W

| Adjust value to increase or decrease

brightness of AQ Ring (on AQ Ring devices only).

AV28

| ****

Good-Fair

| ****

0 I 100

| ****

no units

| ****

70

| ****

R/W

| Adjust this value to change the threshold below which the display or AQ Ring will show a “fair” rating.

AV29

| ****

Fair-Poor

| ****

0 I 100

| ****

no units

| ****

40

| ****

R/W

| Adjust this value to change the threshold at or below which the display or AQ Ring will show a “Poor”

rating.

AV30

| ****

VOCMode

| ****

0/1

| ****

No units

| ****

0

| ****

R/W

| 0 = Normal operation mode 1 = Training mode (48 hours)

AV31

| ****

Factory reset

| ****

1234 *

| ****

no units

| ****

0

| | Write value 1234 to this register to set all customer-accessible values to factory defaults. The device will reboot after the factory restore has been completed.

AV32

| ****

Protocol

| 0 = Modbus 1 = BACnet| ****

no units

| | Read-only| Read from device DIP switches. See the installation Manual for details.

AV33

| ****

MAC address

| ****

0 I 127

| ****

no units

| | Read-only| Read from device DIP switches. See the installation Manual for details.

AV34

| ****

Baud rate

| 0 = 9600

1 = 19200

2 = 38400

3 = 57600

4 = 76800

5 = 115200

| ****

no units

| | ****

Read-only

| ****

Read from device DIP switches. See the installation Manual for details.

AV35

| ****

Data/Parity/Stop

| 0 = 8N1

1 = 8N2

2 =801

3 = 8E1

| ****

no units

| | ****

Read-only

| ****

Read from device DIP switches. See the installation Manual for details.

AV55

| ****

Display Lock

| ****

0 = Disabled

1 = Enabled

| ****

No units

| ****

0

| ****

R/W

| Choose to lock the settings Menu. This will override the menu lock setting in the device GUI display settings and the device will remain locked until this setting is changed

through comms.

AV56

| ****

PIR Display Wake-Up

| 0 = Disabled

1 = Enabled

| ****

No units

| ****

0

| ****

R/W

| Will use the PIR motion sensor to wake up the device display when a motion event is detected
---|---|---|---|---|---|---

AV57

| ****

Screensaver Timeout

| ****

1/120

| ****

minutes

| ****

1

| ****

R/W

| Sets the time in minutes the screen will stay active until the screensaver turns on

AV60

| CO Calibration Expiration| ****

0/365

| ****

days

| ****

365

| Read Only| A count down in days until the CO sensor needs calibration.

AV61

| CO Sensor End-of-Life| ****

0/1825

| ****

days

| ****

1825

| Read Only| A countdown in days of the CO sensor’s total lifetime.

AV62

| Ozone Calibration expiration| ****

0/365

| ****

Days

| ****

0

| ****

Read-only

| ****

Shows several days left on the Ozone calibration.

AV63

| ****

BTN State Hold Time

| ****

1/600

| ****

Seconds

| ****

10

| ****

R/W

| ****

Number of seconds that the button state is active after the button is pressed.

AV64

| ****

Ozone Sensor end-of-life

| ****

0/1825

| ****

Days

| ****

1825

| ****

Read-only

| ****

Number of days until the Ozone sensor is at the end of its life.

AV65

| ****

Temp Setpoint

| ****

-40.0/122.0

| ****

F/C

| ****

72

| ****

Read-only

| ****

Setpoint is used when the slider is not equipped.

Analog Output

Register

| ****

Description

| ****

Min/Max

| ****

Units

| ****

Read

| ****

Functionality

---|---|---|---|---|---

AV36

| ****

Analog Source

| 0 = None

1 =CO2

2 = Humidity

3 = Temperature 4=VOC S=PM

6 = Slider Temp 7 = PIO-Temp

8 = PIO-CO2

9 = PIO-Slider Temp 10=CO

11 = Ozone

| ****

None

| ****

R/W

| ****

Sets the source of the analog output channel.

AV37

| ****

Analog V min

| ****

0/10

| ****

Volts

| ****

R/W

| This value corresponds to the lowest point on an analog scale. For a 0-10V signal, set to 0V. For a 2-10V signal,

set to 2V.

AV38

| ****

Analog V max

| ****

0/10

| ****

Volts

| ****

R/W

| This value corresponds to the highest point on an analog scale. For a 0-10V signal, set to 10V. For a 0-SV signal,

set to SV.

AV39

| ****

Analog mA min

| ****

0/20

| ****

mA

| ****

R/W

| This value corresponds to the lowest point on an analog scale. For a 4- 20mA signal, set to 4mA. For a 0-

20mA signal, set to 0mA.

AV40

| ****

Analog mA max

| ****

0/20

| ****

mA

| ****

R/W

| This value corresponds to the highest point on an analog scale. For a 0-20mA or 4-20mA signal, set to

20mA.

PID Setting

Register

| ****

Description

| ****

Min/Max

| ****

Units

| ****

Read

| ****

Functionality

---|---|---|---|---|---

AV41

| ****

PID CO2

setpoint

| ****

0/10000

| ****

ppm

| ****

R/W

| ****

Sets the CO2 setpoint for the PID-controlled analog output.

AV42

| ****

PIDTemp Setpoint

| ****

-40/122

| ****

F/C

| ****

R/W

| Sets the Temperature set point for the PID-controlled analog output.

AV43

| ****

PID Kp

| ****

-100

/100

| ****

None

| ****

R/W

| ****

Sets the Proportional gain PID coefficient.

AV44

| ****

PID Ki

| ****

0/100

| ****

None

| ****

R/W

| ****

Sets the Integral gain PID coefficient.

AV45

| ****

PID Kd

| ****

0/100

| ****

None

| ****

R/W

| ****

Sets the Derivative gain PID coefficient.

AV46

| ****

PID Invert

| 0 = Not Inverted 1 = Inverted| ****

None

| ****

R/W

| ****

This setting will invert the overall error signal (R – SP instead of (SP – R).

AV66

| ****

AQI PID

Setpoint

| ****

0/100

| ****

%

| ****

R/W

| ****

Can use this to control a PID loop based on the calculated air quality index.

Air Quality Thresholds

If Air Quality is selected, the device will monitor each CO2, 1VOC, PM, RH, and Temp sensor present and will display accordingly. The device will calculate an average air quality based on up to 5 sensors and display good, fair, or poor accordingly. The device will come populated with the Senva recommended Good-Fair-Poor thresholds, but they can be changed with the following points, or in the device menu.

$TotalSense-AI31-BACnet-Protocol-fig- $6$$ $TotalSense-AI31-BACnet-Protocol-fig- $7$$

The average air quality is calculated as follows for the sensors that have been enabled (see table on page 19 to enable and disable each senor):

Each reading is rated according to the above thresholds and given an air quality rating. For each sensor, a good rating is given 90%, fair is given 60% and poor is given 0% air quality.
The average of all sensors’ air quality is calculated.
The average air quality is assigned based on the following thresholds. These thresholds can be adjusted in AV28 Good-fair and AV29 fair-poor.
- Good ≥ 75
- 55 < Fair< 75
- Poor ≤ 55

Register

Functionality

---|---|---|---|---|---

AVS0

| ****

AQ Enable Temp

| 0 = Disabled

1 = Enabled

| ****

None

| ****

R/W

| These settings are used to enable or disable a sensor being used for the Air Quality calculation. For a sensor to be enabled it must be installed on the device.

All sensors will be shipped with present elements enabled in the Air Quality calculation.

AV51

| ****

AQ Enable Humidity

| 0 = Disabled

1 = Enabled

| ****

None

| ****

R/W

AV52

| ****

AQ Enable CO2

| 0 = Disabled

1 = Enabled

| ****

None

| ****

R/W

AV53

| ****

AQ Enable PM

| 0 = Disabled

1 = Enabled

| ****

None

| ****

R/W

AV54

| ****

AQ Enable

voe

| ****

0 = Disabled

1 = Enabled

| ****

None

| ****

R/W

AV58

| ****

AQ Enable CO

| 0 = Disabled

1 = Enabled

| ****

None

| ****

R/W

Intl 6

AV59

| ****

AQ Enable Ozone

| 0 = Disabled

1 = Enabled

| ****

None

| ****

R/W

Intl 6

VOC Molecular Weights

Senva’s TVOC sensor uses an Ethanol reading to determine a raw TVOC value. Additionally, conversion from g/m3 uses the molecular weight of Ethanol. To scale based on a different gas baseline, choose the appropriate gas from the list below and enter the scale factor in AV8.
Please note that the sensor is measuring TOTAL VOCs, so adjusting the scale factor will not necessarily result in a gas-specific reading unless, in special cases, that is the only expected VOC present in the area. It is recommended to use the 1.0 scale factor in most cases. The RESET standard suggests calculating TVOC based on the molecular weight of isobutylene (scale factor: 1.218).

Data Source: http://aqt-vru.com/emissions/complete-list-of-vocs/.

Contamination

| Name| Molecular Weight|

Scale factor

---|---|---|---
ACETYLENE| ACETYLENE| 26.04| 0.565
FORMALDEHYDE| FORMAL| 30.03| 0.652
METHANOL| MEOH| 32.04| 0.695
PROPANE| PROPANE| 44.1| 0.957
ETHANOL| ETOH| 46.07| 1.000
DIMETHYL ETHER| ME-O-ME| 46.07| 1.000
METHYL CHLORIDE| CH3-CL| 50.49| 1.096
1,3-BUTADIENE| 13-BUTDE| 54.09| 1.174
ISOBUTENE| ISOBUTEN| 56.11| 1.218
N-BUTANE| N-C4| 58.12| 1.262
ISOBUTANE| 2-ME-C3| 58.12| 1.262
ACETIC ACID| ACETACID| 60.05| 1.303
ISOPROPYL ALCOHOL| I-C3-OH| 60.1| 1.305
ETHYLENE GLYCOL| ET-GLYCL| 62.07| 1.347
ISOPRENE| ISOPRENE| 68.12| 1.479
BUTANAL| 1C4RCHO| 72.11| 1.565
N-PENTANE| N-C5| 72.15| 1.566
ISOPENTANE| 2-ME-C4| 72.15| 1.566
HYDROXY ACETONE| HORACE| 74.08| 1.608
ISOBUTYL ALCOHOL| I-C4-OH| 74.12| 1.609
BENZENE| BENZENE| 78.11| 1.695
TOLUENE| TOLUENE| 92.14| 2.000
M-XYLENE| M-XYLENE| 106.17| 2.305
O-XYLENE| O-XYLENE| 106.17| 2.305
P-XYLENE| P-XYLENE| 106.17| 2.305
TERPENE| TERPENE| 136.24| 2.957