Table of Contents
Advertisement
Meaning of STOP-ACTIVE LED
The following table shows the meaning of the STOP-ACTIVE LED of the CPU 1515‑2 PN.
Table 5-3 Meaning of the LED
STOP-ACTIVE LED
LED lit yellow
LED off
CPU 1515-2 PN (6ES7515-2AN03-0AB0)
Equipment Manual, 11/2022, A5E46416198-AC
The CPU has been switched to STOP mode using the STOP button.
•
As long as the STOP-ACTIVE LED is lit up, switching the CPU to RUN mode is only possible
using the RUN button.
•
The CPU can then no longer be set to RUN mode via display operation or via online functions.
The state of the buttons is retained at power-off. If the CPU does not start up automatically
after a power-on, you have to keep the STOP button pressed during startup until the STOP-
ACTIVE LED is activated.
•
If an automatic startup is to be reliably prevented after a power-on, the STOP button has to
be kept pressed during the startup of the CPU until the STOP-ACTIVE LED is activated.
•
The CPU has been set to STOP mode using the display or programming device/PC and not
with the STOP button on the device.
•
The CPU is in RUN mode.
Interrupts, error messages, diagnostics and system alarms
5.1 Status and error display of the CPU
Meaning
37
Advertisement
Table of Contents
