92 Rockwell Automation Publication 1734-UM013N-EN-P - September 2017
Chapter 5 Configure the Module in a GuardLogix Controller System
7. From the Input Error Latch Time field, enter the time that the module
holds an error to make sure that the controller can detect it (0…65,530 ms,
in increments of 10 ms - default 1000 ms).
This setting provides more accurate diagnostics. The purpose for latching
input errors is to make sure that intermittent faults that can exist only for a
few milliseconds are latched long enough for the controller to read. The
amount of time to latch the errors are based on the RPI, the safety task
watchdog, and other application-specific variables.
8. Click Apply.
Configure the Test Outputs
To complete the test output configuration, follow this procedure.
1. From the Module Properties dialog box, click the Test Output tab.
2. Assign the Point Mode.
There is also a Test Output Fault Action parameter that can only be read or
written to via explicit messaging. If communication to the module times
out, you can set the test outputs to Clear OFF (default) or Hold Last State.
For more information, see Appendix B
.
3. Click Apply.
Choose Description
Not Used The test output is disabled (default for T2 and T3).
Standard The test output point is controlled programmatically by the GuardLogix
controller.
Pulse Test The test output is being used as a pulse test source (default for T0 and T1).
Power Supply A constant 24V is placed on the output terminal. It can be used to provide
power to a field device.
Muting Lamp Output
(terminals T1 and T3
only)
An indicator lamp is connected to the output. When this lamp is energized, a
burned-out bulb, broken wire, or short to GND error condition can be detected.
Typically, the lamp is an indicator that is used in light curtain applications.
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