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Chapter 8: RS-485 Modbus Output
M2A-XL Transmitter Operator’s Manual
Register 28
Register 28 is the alarm 2 trigger.
0=Decreasing
1=Increasing
Register 29
Register 29 is the alarm 2 normal relay state.
0=Normally De-Energized
1=Normally Energized
Register 30
Register 30 is the alarm 2 relay reset.
0=Latching
1=Self-Resetting
Register 31
Register 31 is the alarm 2 ON delay.
Integer values are in seconds.
Register 32
Register 32 is the alarm 2 OFF delay.
Integer values are in seconds.
Register 33
Register 33 is zero suppression.
Toxics and LEL: 0%-6% of full scale
Oxygen: 0%-0.7% Oxygen
The decimal point location is the same as specified in Register 1.
Register 34
Register 34 is noise filter.
Integer values in seconds.
0-60 in 5 second increments.
Register 35
Register 35 is calibration timeout in minutes (5, 10, 15, 20, 25, or 30).
Register 36
Register 36 is calibration month (upper byte) and day (lower byte).
This is zero based (e.g. January=0 and the 1st=0).
Register 37
Register 37 is the calibration year.
