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Diagnostic options and service support
5.2 Status and error displays
LEDs
• Status group displays of the module
Status displays of the module (LEDs) (Page 36)
– The RUN/STOP LEDs provide information about the operating state of the module.
– The ER LEDs indicate whether there is an error in standalone mode.
– The MT LED lights up when maintenance is required.
• Controller and interfaces LEDs
– Segment LEDs (Page 37)
– PN (LAN) LEDs (Page 38)
– SYNC LEDs (Page 39)
– PB DP LED (Page 40)
– SMC LED (Page 40)
5.2.2
Status displays of the module (LEDs)
Definition
The status displays are group displays.
Status displays of the module
These LEDs are visible on all controller modules above the front flap.
The status displays are only labeled on the CPU.
The order of the LED displays is the same for all modules of the controller.
Sequence from left to right:
36
The PROFINET IO LEDs provide information about the status of the connections.
The SYNC LEDs have no function in a CPU with firmware version 4.0.
The PROFIBUS DP LEDs provide information about the status of the connection.
The SMC slot has no function in a CPU with firmware version 4.0.
Equipment Manual, 11/2022, A5E51584364-AA
CPU 4168-H
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