Siemens SIMATIC ET200SP Equipment Manual page 28

POWER RUN/STOP LED
LED
LED lit green LED flashes
yellow/green
Meaning of the LINK LED
Each port has a LINK LED (LK1, LK2, LK3). The table below shows the various "LED scenarios"
of the ports of the CPU 1510SP-1 PN.
Table 4- 2
LED flashes green
Note
"LED" instruction
You can read the status (e.g. "On" or "Off") of LEDs of a CPU or a module using the "LED"
instruction. Note, however, that it is not possible to read the LED status of the LINK RX/TX
LEDs on all S7-1500 CPUs.
You can find additional information on the "LED" instruction in the STEP 7 online help.
CPU 1510SP-1 PN (6ES7510-1DJ01-0AB0)
Equipment Manual, 05/2021, A5E03506268-AD
ERROR
LED
LED flashes red
Meaning of the LEDs
LINK LED
There is no Ethernet connection between the PROFINET interface of the
PROFINET device and the communication partner.
LED off
No data is currently being sent/received via the PROFINET interface.
There is no LINK connection.
The "LED flashing test" is being performed.
There is an Ethernet connection between the PROFINET interface of your
PROFINET device and a communication partner.
LED lit green
Interrupts, error messages, diagnostics and system alarms
4.1 Status and error display of the CPU
MAINT
LED
LED flashes yellow Test of LEDs during startup, inserting a
module.
LED flashing test
Meaning
Meaning
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