152 Rockwell Automation Publication 1756-UM022D-EN-P - May 2017
Appendix A Status Indicators
The safety partner has an OK status indicator.
Controller Status Display
The controller status display scrolls messages that provide information about
the controller’s firmware revision, energy storage module (ESM) status, project
status, and major faults.
Safety Status Messages
The primary controller display can show the following messages. The safety
partner displays ‘L7SP’.
Table 50 - 1756-L7SP Status Indicator
Indicator Status Description
OK Off No power is applied.
Green The safety partner is operating with no faults.
Red Powering up or nonrecoverable controller fault.
Table 51 - Safety Status Display
Message Interpretation
No Safety Signature Safety Task is in Run mode without a safety task signature.
Safety Partner Missing The safety partner is missing or unavailable.
Hardware Incompatible The safety partner and primary controller hardware is incompatible.
Firmware Incompatible The safety partner and primary controller firmware revision levels are incompatible.
No CST Master A coordinated system time (CST) master has not been found
Safety Task Inoperable The safety logic is invalid. For example, a mismatch occurred between the primary
controller and the safety partner, a watchdog timeout occurred, or memory is corrupt.
Safety Unlocked The controller is in Run mode with a safety signature, but is not safety-locked.
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