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Interrupts, error messages, diagnostics and system
alarms
The status and error displays of the CPU 1517T-3 PN are described below.
You can find additional information on the topic of "Interrupts" in the STEP 7 online help.
You can find additional information on the topic of "Diagnostics" and "System alarms" in the
Diagnostics (http://support.automation.siemens.com/WW/view/en/59192926) function
manual.
4.1
Status and error displays of the CPU
LED display
The following figure shows the LED displays of the CPU 1517T-3 PN/DP.
①
②
③
④
⑤
⑥
⑦
Figure 4-1
34
RUN/STOP LED (yellow/green LED)
ERROR LED (red LED)
MAINT LED (yellow LED)
No function
LINK RX/TX LED for port X1 P1 (yellow/green LED)
LINK RX/TX LED for port X1 P2 (yellow/green LED)
LINK RX/TX LED for port X2 P1 (yellow/green LED)
LED display of the CPU 1517T-3 PN/DP (without front panel)
CPU 1517T-3 PN/DP (6ES7517-3TP00-0AB0)
Manual, 12/2017, A5E36285525-AB
4
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