Modbus MFU Option Card Installation Manual
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Publication PUB091-004-00_0918
8.3 Maintenance and Repair
There is no periodic service requirement for the MFU.
Repairs should not be attempted on the module. Replacing the MFU assembly with a new
replacement device should rectify any failure. Static sensitive devices are used in the MFU. It is
therefore mandatory to observe anti-static precautions when handling or working on the unit.
8.4 Records
In order that a replacement can be easily introduced in the event of a device failure it is very important
to record and keep safe all the settings made for the variable registers. The table lists all the registers
that must be checked and set up for each Modbus Module on a network. The data should be recorded
for each module.
Actuator Configurable Registers
Parameter
Number.
Description
Setting
Notes
7
Action on Loss of Comms
8
Limited Range Position Minimum
9
Limited Range Position Maximum
10
Deadband
11
Motion Inhibit Time
12
Aux Input Mask
13
Comms Lost Position
14
Hysteresis
19
ESD DI-4/Net Disable
21
Comms Fault Timer
Network Configurable Registers
Parameter
Number.
Description
Setting
Notes
22
Address
23
Baud Rate (baud)
24
Parity and Stop bits
25
Termination on or off
26-31
Actuator Tag Name
Note:
Make a note of all changes to register settings to ensure that, in the case of a failure,
the replacement device can be swiftly set to the correct values.
