User guide

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STOP input signal (normally closed) is not being received from the PLC, and the System
will not operate. Determine the cause of the problem, and take appropriate action.
4. If the READY message is present and the problem still exists, attempt to operate the
System from the manual control pushbuttons on the front of the Main Unit. If the System
functions normally with the manual controls, then the problem may be located in either the
station control or the Multi board input circuits. Verify station control signal outputs.
5. Check the Main Unit input voltage and power cable connection.
6. If the problem still exists, turn off the power. Remove the Multi PCB, and verify correct
installation of all removable IC chips on the Multi board.
7. Reinstall the Multi PCB. Ensure that the circuit board is properly seated.
8. Turn on the power. If problem persists, replace the Multi PCB. (Refer to Section 8.3)
9. If the problem still exists, replace the entire Main Unit. (Refer to Section 8.3)
Chapter 9: Troubleshooting User Console Version A3.53
Page 9-7