Siemens Simatic S7-1500 Manual page 119

Meaning of the LED displays
The following tables explain the meaning of the status and error displays. Corrective
measures for diagnostic alarms can be found in the section Interrupts and diagnostics of the
analog on-board I/O (Page 122).
Table 6- 3 RUN/ERROR status and error displays
LEDs
RUN ERROR
No voltage or voltage too low
Off Off
Analog on-board I/O starts up and flashes until
valid parameter assignment.
Flashes Off
Parameters have been set for the analog on-
board I/O.
On Off
Indicates module errors (at least one error is
present on one channel, e.g. wire break).
On Flashes
Hardware defective.
Flashes Flashes
CHx LED
Table 6- 4 CHx status display
CHx LED
Channel disabled.
Off
Channel parameters set and OK.
On
Channel parameters set, channel error present.
Diagnostics alarm: e.g. wire break
On
Note
Maintenance LED
During ramp-up, the firmware of the CPU checks the consistency of the calibration data of
the analog on-board I/O stored by the SIEMENS Production. The yellow MAINT LED lights
up if the firmware detects an inconsistency (e.g. an invalid value) or missing calibration data.
The MAINT-LED is located next the red ERROR-LED on the analog on-board I/O.
Note that the MAINT LED on the analog on-board I/O is only intended for troubleshooting by
SIEMENS. In normal condition, the MAINT-LED should not light up. However, if the LED is lit
up, please contact SIEMENS "mySupport" at Internet
(https://support.industry.siemens.com/My/ww/en/).
CPU 1512C-1 PN (6ES7512-1CK00-0AB0)
Manual, 09/2016, A5E35306440-AB
Meaning
Meaning
Interrupts/diagnostics alarms
6.1 Status and error displays
Remedy
Turn on the CPU and/or the system power
•
supply modules.
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Evaluate the diagnostics and eliminate the error
(e.g. wire break).
Replace the compact CPU.
Remedy
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Check the wiring.
Disable diagnostics.
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