Doc# E107706 9- 9
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9: External I/O Modules
All outputs share a single common point. This is also an isolated connection (from
ground).
The Modbus Map for the Analog Output Module (and operating details) can be found in
the Modbus Communicating I/O Modules Manual.
9.5.2: Normal Mode
Normal Mode is the same for the 0-1mA and the 4-20mA Analog Output Modules
except for the number of processes performed by the modules.
Both devices:
1. Accept new values through communication.
2. Output current loops scaled from previously accepted values.
The 0-1mA module includes one more process in its Normal Mode:
3. Read and average the A/D and adjust values for Process 2 above.
The device will operate with the following default parameters:
Address: 247 (F7H)
Baud Rate: 57600 Baud
Transmit Delay Time: 20 msec
Normal Operation is prevented by a number of occurrences. See Section 9.4 for
details.
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