Communicate With The Module - Allen-Bradley 1738-IR2M12 User Information

8 ArmorPOINT RTD and Thermocouple Input Modules

Communicate with the Module

I/O messages are sent to (consumed) and received from (produced) the ArmorPOINT
I/O modules. These messages are mapped onto the processor's memory. The
ArmorPOINT RTD I/O input module produces 6 Bytes of input data (scanner Rx –
status) and fault status data. The ArmorPOINT thermocouple I/O input module
produces 8 Bytes of input data (scanner Rx – status) and fault status data. They do not
consume I/O data (scanner Tx).
Default Data Map – 1738-IR2M12
Message size: 6 Bytes
15 14 13
Produces Input channel 0 high byte
(scanner Rx)
Input channel 1 high byte
Status byte for channel 1
OR UR HHA LLA HA LA
Consumes No consumed data
(scanner Tx)
Where: OR = Overrange; 0 = No error, 1 = Fault
UR = Underrange; 0 = No error, 1 = Fault
HHA = High/High Alarm; 0 = No error, 1 = Fault
LLA = Low/Low Alarm; 0 = No error, 1 = Fault
HA = High Alarm; 0 = No error, 1 = Fault
LA = Low Alarm; 0 = No error, 1 = Fault
CM = Calibration Mode; 0 = Normal, 1 = Calibration mode
CF = Channel Fault Status; 0 = No error, 1 = Fault
Publication 1738-IN005B-EN-E - January 2013
12 11 10 09 08 07 06 05
CM CF
04 03 02 01 00
Input channel 0 low byte
Input channel 1 low byte
Status byte for channel 0
OR UR HHA LLA HA LA CM CF