RUN/STOP LED ERROR LED MAINT LED Meaning
Startup (CPU booting)
Test of LEDs during startup, inserting a module.
LED flashes
yellow/green
LED flashes red LED flashes yellow
LED flashing test
Meaning of LINK RX/TX LED
Each port has a LINKRX/TX-LED. The table below shows the various "LED scenarios" of the
ports for the CPU1513‑1PN.
Table 5-2Meaning of the LEDs
LINK TX/RX LED Meaning
LED off
There is no Ethernet connection between the PROFINET interface of the PROFINET device and
the communication partner.
No data is currently being sent/received via the PROFINET interface.
There is no LINK connection.
LED flashes green
The "LED flashing test" is being performed.
LED lit green
There is an Ethernet connection between the PROFINET interface of your PROFINET device and
a communication partner.
LED flashes yellow/green
Data is currently being received from or sent to a communications partner on Ethernet via the
PROFINET interface of the PROFINET device.
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 STEP7 online help.
36
CPU 1513-1 PN (6ES7513-1AM03-0AB0)
Equipment Manual, 11/2022, A5E40881673-AC
Interrupts, error messages, diagnostics and system alarms
5.1 Status and error display of the CPU
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