Siemens SIMATIC S7-1500R/H

RUN/STOP LED ERROR LED MAINT LED Meaning
Maintenance demanded for the plant.
You need to check/replace the affected hardware
within a short period of time.
The primary CPU is in the RUN or RUN-Syncup oper
ating state.
LED lit green LED off LED lit yellow
Active Force job
LED lit green LED off LED off
The CPU is in RUN-Redundant operating state.
There are no events, requirements, errors, etc.
LED lit green
LED flashes red
LED off
A diagnostic event is pending in RUN-Redundant
operating state.
LED lit green
LED flashes red
LED lit yellow
A diagnostic event (e.g. failure of an IO device with
in the PROFINET ring or no access to SIMATIC
memory card possible
1)
) and maintenance is
demanded (e.g. interruption of the PROFINET ring).
1)
If there is not enough storage space on a SIMATIC Memory Card or on both SIMATIC Memory Cards in RUN-Redundant, the
write function is aborted and the redundant system continues operation with the original configuration. The redundant
system will remain in the RUN-Redundant system state.
NOTE
MAINT LED of the two CPUs
The MAINT LEDs of both CPUs only go out when the following conditions are fulfilled:
• The CPUs are in the RUN-Redundant system state.
• No maintenance is demanded.
NOTE
LED displays in redundant operating state
In the RUN-Redundant system state, the LED displays on both CPUs are identical (exception:
you are performing an LED flash test on one CPU).
Meaning of LINK RX/TX LED
Each port of the X1, X2, X3 and X4 interfaces has a LINKRX/TX LED. The table below shows
the various LED patterns of the ports of the CPU1517H‑3PN.
Table 5-2Meaning of LINK RX/TX LED
LINK TX/RX LED Meaning
Off
There is no connection between the interface of the device and a communication partner.
No data is currently being sent/received via the interface.
There is no LINK connection.
The redundancy connections were interrupted.
33
Interrupts, diagnostics, error messages and system events
5.1 Status and error display of the CPU
CPU1517H-3PN (6ES7517-3HP00-0AB0)
Equipment Manual, 11/2022, A5E42011886-AD