Section 50
00-02-0674
04-16-10
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22 -
How to Configure a Discrete Remote
– ONE CHANNEL
Configuring a Remote for NO/NC operation is done by programming Configuration Register 0
(CONFIG_0) which is located at MODBUS register 38 in each Remote‟s register space.
NOTE:
The Remote will initially be programmed for Normally Open (NO)
operation.
NOTE:
See
How to Program Remote Configuration Registers
for
additional information on programming the Configuration Registers.
Follow these steps to program the polarity:
1. Confirm that a command for the remote is not already pending.
o
Read register 34 in the Remote‟s register space and confirm that the value is
zero.
o
If the value is not zero then wait until two heartbeats have occurred at which time
the value should be zero.
2. Enable MODBUS writes by sending a value of 4660 to MODBUS address 40053
3.
Write a value of „0‟ or „1‟ to MODBUS register 38 in the Remote‟s register space.
o
Normally Open
0
o
Normally Closed
1
4. Confirm that the value was written correctly.
NOTE:
Always test Remote operation after programming.
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