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Chapter 8: RS-485 Modbus Output
65-2658XL-CH4-4 M2A-XL Transmitter Operator’s Manual
Table 11: Register 2, Operating State, Alarms & Relays Bit & Field Assignments
Bit(s)
Value
[15:12]
Operating State
0 = Undefined
1 = Initialization
2 = Normal
3 = Warm-up
4 = Fail
5 = Calibration
6 = Post-Calibration
7 = Low Power
8 = Setup
[11]
Gas Type Change
0=Not Changed
1=Changed
[10]
Configuration Change
0=Not Changed
1=Changed
[9]
Calibration Activity Flag
0=No Calibration Activity
1=Calibration Activity Has
Occurred
[8]
Fail Status
0 = Fail Not Asserted
1 = Fail Asserted
[7:6]
Alarm 2 Status
0 = No Alarm
1 = Unacknowledged Alarm
2 = Acknowledged Alarm
3 = Unused Code
[5:4]
Alarm 1 Status
0 = No Alarm
1 = Unacknowledged Alarm
2 = Acknowledged Alarm
3 = Unused Code
[3]
Overscale Status
0 = Not Overscale
1 = Overscale
