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4.2
Status and Error Displays of the C7-635
Meaning of the Status and Error Displays
The status and error displays are explained in the sequence in which they are
arranged on the C7-635.
Display
Meaning
SF (red)
C7-635 group error
(SF)
BF (red)
Bus error
indication
5 VDC (green)
5 VDC supply for
the C7-635
FRCE (yellow)
Reserved
RUN (green)
RUN mode of the
C7-635
STOP (yellow)
STOP mode of the
C7-635
4.3
Arrangement of additional S7-300 modules
Additional S7-300 Modules
You have the option of connecting up to four additional S7-300 modules to the
C7-635 by means of the S7-300 I/O bus. These modules can be connected either
directly on the device or at a distance of up to 1.5 m.
If you insertan IM-360 interface module, you can use it to connect additional
modules.
You will find a description of how to install S7-300 modules in the S7-300,
CPU 31xC and CPU 31x: Hardware and Installation manual.
Siemens Controls
C7-635 Control System
A5E00155581-04
Description
Illuminates if there are:
•
Hardware errors
•
Firmware errors
•
Programming errors
•
Parameter assignment errors
•
Calculation errors
•
Time errors
•
I/O errors during internal I/O functions
•
For exact error determination, a programming device/PC has
to be used, and the diagnostic buffer has to be read out.
Illuminates when there are
•
bus errors (physical errors)
•
DP interface errors
Illuminates if internal 5 VDC supply is okay.
Illuminates when a force request is active.
Illuminates when the C7-635 is processing the user program.
Flashes (2 Hz) during the C7-635 startup (in addition, the STOP
display illuminates; after the STOP display goes out, the outputs
are enabled).
Illuminates when the C7-635 is not executing a user program
Flashes slowly when the C7-635 requests a general reset
Flashes rapidly when the C7-635 is performing a general reset.
Special Features of the C7-635
4-5
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