Rockwell Automation 61C365 4 Output 4-20mA Analog Rail - Manual (Page 36)

5Ć4
Step 1. Verify that the application program(s) is correct. Check to
see that the program is referencing the correct registers
(AutoMate) or symbolic names (DCS 5000/AutoMax).
Verify that the data being output is within the specified
limits.
Step 2. Stop any application tasks that are running. Turn off
power to the Analog Rail module.
Step 3. Try to clear the condition by disconnecting and then
reconnecting the I/O Rail cable. Make certain the
connections are tight. If applicable, check the
connections between the host and the Local I/O Head,
the AutoMate Remote I/O Head, or the DCS
5000/AutoMax Remote I/O Head. Check that the pins on
the input connector are not bent.
Step 4. Turn off power to the external hardware. Verify that the
wiring to the external hardware is tight and functioning
correctly.
Step 5. Turn on power to the external hardware. Before testing,
make certain that the external hardware cannot respond
to outputs from the Analog Rail module.
For output channels, use the Executive software to write a
value between 0 and 4095 to each channel. Use an
ammeter to verify that the signal on the terminal points is
proportional to the value. If the signal is being converted
correctly, there is a problem with the external hardware or
wiring.
Step 6. Troubleshoot the external hardware, the wiring, and the
host.