Siemens DQ 16x24VDC/0.5A HF User Manual page 27

Interrupts/diagnostics alarms
5.1 Status and error displays
Meaning of the LED displays
The tables below explain the meaning of the status and error displays. Remedial measures
for diagnostic alarms can be found in section Diagnostic alarms (Page 28).
RUN and ERROR LED
Table 5- 1 Status and error displays RUN and ERROR
LED
RUN ERROR
Off Off
Flashes Off
On Off
On Flashes
Flashes Flashes
LED MAINT
Table 5- 2 MAINT status display
LED MAINT
Off
On
PWR1 and PWR2 LED
Table 5- 3 PWR1 and PWR2 status indication
LED PWRx
Off
On
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Meaning
Voltage missing or too low at backplane bus
The module starts and flashes until the valid
parameter assignment is set.
Module is configured
Indicates module errors (at least one error at
one channel, e.g., short-circuit to ground).
Hardware defective
Meaning
0 = No maintenance interrupt is pending.
1 = The maintenance interrupt "Limit value
warning" is pending.
Meaning
Supply voltage L+ too low or missing
Supply voltage L+ is present and OK
Switch on the CPU and/or the system pow-
•
er supply modules.
Verify that the U connectors are inserted.
•
Check to see if too many modules are in-
•
serted.
---
Evaluate the diagnostics data and eliminate the
error (e.g., check the cables).
Replace the module.
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---
Check the L+ supply voltage.
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Digital output module DQ 16x24VDC/0.5A HF (6ES7522-1BH01-0AB0)
Solution
Solution
Solution
Manual, 06/2018, A5E35683409-AC