Instruction Manual

98 Faults • When a Fault Occurs
Publication 1398-PM601A-EN-P — October 2000
I/O
Faults
When a Fault Occurs
When a fault condition has been detected by the ULTRA Plus or IQ the following events occur:
• If a program is executing, it is stopped. Refer to Part 5 • Language Reference, STOP for more
detailed information.
• If a program is running and the Program Running output is assigned, the Program Running output
will turn OFF.
• If the ULTRA Plus or IQ is enabled, it is disabled. Refer to Part 5 • Language Reference, DIS-
ABLE, for more detailed information.
• If the Error output is assigned, it is turned ON. Refer to Part 2 • Software and Hardware Integra-
tion, Input and Outputs, for more detailed information.
• If a program was running and outputs are assigned to turn OFF (ON) they will turn OFF (ON).
• The Enabled and Ready relay outputs will both open.
• System Program 27, Error Routine, will run. This program will print the error message to the Oper-
ator Terminal screen. This program may be modified to perform additional tasks upon occurrence
of a fault.
When the condition that caused a fault is eliminated, the fault does not automatically clear. An action
must be taken by something other than the ULTRA Plus or IQ to clear the fault and enable the ULTRA
Plus or IQ again. For example if a travel limit was hit, the ULTRA Plus or IQ remains disabled even
after the switch is cleared.