Siemens Simatic S7-1500 Manual - Halaman 35

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Halaman Cetak
Siemens Simatic S7-1500 Manual
Meaning of the LED displays
The following tables explain the meaning of the status and error displays. Remedial
measures for diagnostic reports can be found in chapter Diagnostics alarms (Page 38).
RUN and ERROR LED
Table 5- 1
Status and error displays RUN and ERROR
LED
RUN
ERROR
Off
Off
Flashes
Off
On
Off
Flashes
On
Flashes
Flashes
PWR1 and PWR2 LED
Table 5- 2
PWR1 and PWR2 status indication
LED PWR1 / PWR2
Off
On
CHx LED
Table 5- 3
CHx status display
LED CHx
Off
On
On
DI 32x24VDC HF digital input module (6ES7521-1BL00-0AB0)
Manual, 09/2016, A5E03485935-AF
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., wire break).
Hardware defective
Meaning
Supply voltage L+ too low or missing
Supply voltage L+ is present and OK
Meaning
0 = Status of the input signal
1 = Status of the input signal
Diagnostics: Wire break
Supply voltage L+ too low or missing
Interrupts/diagnostics alarms
5.1 Status and error displays
Remedy
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 inserted.
•
---
Evaluate the diagnostics data and eliminate the
error (e.g., wire break).
Replace the module.
Remedy
Check supply voltage L+.
---
Remedy
---
---
Check the wiring. When using simple switches,
deactivate diagnostics or connect a resistor
(25 kΩ ... 45 kΩ) to the encoder contacts.
Check supply voltage L+
35