EPS IPES-IR3 - Modbus Status Polling

820-0003
IPES IR3 Flame Detector
Operating Manual
Page 33 of 37
Poll Status
Command
The following 8‐byte Modbus command may be sent in order to poll the status of the IPES‐ IR3:
8‐byte Modbus command
Byte
Description
0
Current Modbus address (247 if IPES‐IR3 set to factory default.
1
4 (Modbus function code for reading from the device)
2
0
3
1
4
0
5
1
6
Low byte of 16‐bit CRC
7
High byte of 16‐bit CRC
The IPES‐IR3 responds with a 7‐byte packet with the following format:
7 byte Poll Status Command
Byte
Description
0
Current Modbus address
1
4 (Modbus function code for reading from the device)
2
2
3
Status:
Bit 0: 1 = fast detection, 0 = slow detection
Bit 1: 1 = high sensitivity, 0 = medium sensitivity
Bit 2: 1 = latching on, 0 = latching off
Bit 3: 1 = fire relay enable, 0 = fire relay disable
Bit 4: 1 = fault relay enable, 0 = fault relay disable
Bit 5: 1 = heater enable, 0 = heater disable
Bit 6: 1 = very high sensitivity enable,
0 = very high sensitivity disable
Bit7: not used
4
Detector status
Bit 0: 1 = fire detected, 0 = no fire detected
Bit 1: 1 = hardware fault, 0 = no hardware fault
Bit 2: 1 = dust fault, 0 = no dust fault
Bits 3‐7: not used.
5
Low byte of 16‐bit CRC
6
High byte of 16‐bit CRC
Sending any commands other than the ones specified is not
permitted.