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65-2619RK-CH4-4 M2 Transmitter Operator’s Manual
Appendix C: Function Code 16 Registers
The M2 supports Function Code 16 that allows writing to the M2. There are 21 registers in
this Function Code. The register assignments detailed below were implemented in M2
firmware version 5.0. Please see revision B of the M2 manual if you have an M2 with a
firmware version previous to 5.0.
WARNING:
Do not attempt to use registers according to the instructions below with
units that have firmware versions previous to 5.0. For the Modbus register
assignments of M2s with firmware previous to 5.0, see revision B of the
M2 Operator’s Manual. The firmware version is shown on the
Information Screen described on page 16.
Register 1
Register 1 is the alarm 1 set point.
Value must be an integer. Any decimals are omitted.
Register 2
Register 2 is the alarm 1 trigger.
0=Decreasing
1=Increasing
Register 3
Register 3 is the alarm 1 relay state.
0=Normally De-Energized
1=Normally Energized
Register 4
Register 4 is the alarm 1 relay reset.
0=Latching
1=Self-Resetting
Register 5
Register 5 is the alarm 1 ON delay.
Integer value is in seconds.
Register 6
Register 6 is the alarm 1 OFF delay.
Integer value is in seconds.
Register 7
Register 7 is the alarm 2 set point.
Value must be an integer. Any decimals are omitted.
The decimal point location is the same as specified in Register 1 of Function Code 03.
Register 8
Register 8 is the alarm 2 trigger.
0=Decreasing
1=Increasing
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