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Interrupts/diagnostics alarms

5.1 Status and error displays

Analog Input Module AI 8xU/I HS (6ES7531-7NF10-0AB0)

Manual, 07/2014, A5E03484886-AC

Meaning of the LED displays

The following tables explain the meaning of the status and error displays. Remedial

measures for diagnostic alarms can be found in section Diagnostic alarms.

RUN and ERROR LED

Table 5- 1 Status and error displays RUN and ERROR

LED

Meaning

Remedy

RUN

ERROR

Off

Voltage missing or too low at backplane bus.

• Switch on the CPU and/or the system power

supply modules.

• Verify that the U connectors are inserted.

• Check to see if too many modules are insert-

ed.

Flashes

Off

The module starts and flashes until the valid

parameter assignment is set.

---

Off

Module is configured.

Flashes

Indicates module errors (at least one error at

one channel, e.g., wire break).

Evaluate the diagnostics data and eliminate the

error (e.g., wire break).

Flashes

Hardware defective. Replace the module.

PWR LED

Table 5- 2 PWR status display

LED PWR

Meaning

Remedy

Off

Supply voltage L+ to module too low or missing Check supply voltage L+.

Supply voltage L+ is present and OK. ---

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 60 61

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