65-2658XL-CH4-4 M2A-XL Transmitter Operator’s Manual
Chapter 8: RS-485 Modbus Output
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5. If you do not wish to save the adjustments, press and release the DOWN/NO button. The
DO
OVER? YES/NO
message will display. Press and release the DOWN/NO button. The
ABORT? YES/NO
message will display. Press the UP/YES button to return to normal
operation.
If you wish to change some of the adjustments made, press and release the DOWN/NO
button. The
DO OVER? YES/NO
message will display. Press and release the UP/YES
button. The
Re-do MB Setup
message will display and the M2A-XL will return to the first
adjustable parameter. Go back to step 3 and continue.
If you want to save the adjustments made, press and release the UP/YES button.
Modbus
Saved
is indicated on the display for a few seconds and the M2A-XL returns to normal
operation.
NOTE:
All M2A-XLs on a Modbus network must be configured with the same baud
rate and parity, and each M2A-XL must have a unique slave ID. For an
M2A-XL to participate on a network, the ENABLED/DISABLED setting
must be set to ENABLE.
Supported Modbus Functions
The M2A-XL supports Function Code 03: Read Holding Registers and Function Code 16: Write
Registers.
Function Code 03: Read Holding Registers
There are a total of 40 registers available to be read via this Function Code.
Registers 1 - 2
The format (bit & field assignments) for registers 1 - 2 is shown below in Table 10 - Table 11.
Table 10: Register 1, Numerical Reading with Sign & Decimal Point Bit & Field Assignments
Bit(s)
Value & Field
[15]
Sign of Reading
0 = Positive
1 = Negative
[14:13]
Format of Reading
0 = XXX (no decimal point)
1 = XX.X
2 = X.XX
3 = .XXX
[12:0]
Numerical value of display reading (8000
max)
