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Chapter 8: RS-485 Modbus Output
65-2646XL-05-04 M2A Transmitter Operator’s Manual
4. When you have scrolled through all the adjustable parameters,
SAVE IT? YES/NO
appears
on the display.
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 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 returns to normal
operation.
NOTE:
All M2As on a Modbus network must be configured with the same baud rate
and parity, and each M2A must have a unique slave ID. For an M2A to
participate on a network, the ENABLED/DISABLED setting must be set to
ENABLE.
Table 9: Configuration Parameters
Modbus Mode
Parameter
Available Settings & Description
Enabled/Disabled
Can be set to ENABLED or DISABLED (factory setting).
Enables or disables the Modbus output.
Slave ID
The Slave ID can be set to values from 1 (factory setting) to 247.
The M2A will only receive messages from the Master which are
addressed to this Slave ID (except for broadcast messages which
are received by all slaves).
Baud Rate
Can be set to 1200, 2400, 4800, 9600 (factory setting), 14440, &
19200.
Parity
EVEN (factory setting), ODD, NONE
Response Delay
The response delay can be set from 0 (factory setting) to 20 mS.
This is an optional additional delay inserted by the M2A prior to
returning a response message to the Master. It may be helpful in
some installations where the Master’s preparedness to receive
responses might be delayed.
