Rockwell Automation 1738-IT2IM12 ArmorPoint RTD and Thermocouple Modules, Series A - Manual (Page 8)

8 ArmorPOINT RTD and Thermocouple Input Modules
Publication 1738-IN005B-EN-E - January 2013
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 12 11 10 09 08 07 06 05 04 03 02 01 00
Produces
(scanner Rx) Input channel 0 high byte Input channel 0 low byte
Input channel 1 high byte Input channel 1 low byte
Status byte for channel 1 Status byte for channel 0
OR UR HHA LLA HA LA CM CF OR UR HHA LLA HA LA CM CF
Consumes
(scanner Tx) No consumed data
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