RKI Instruments M2A User Manual

Page 61

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M2A Transmitter Operator’s Manual

56

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 11: 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.

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