Diagnostics
5.2 Error Diagnostics
ET 200pro Distributed I/O System - Fail-Safe Modules
Operating Instructions, 05/2007, A5E00394073-02
37
Note
Channel-specific diagnostics are always updated as far as the current diagnostic function in
the diagnostic frame. Subsequent, older diagnostic functions are not deleted.
Remedy: Evaluate the valid current length of the diagnostic frame in
STEP 7 using the
RET_VAL parameter of SFC 13.
Possible Fault Types of Fail-Safe Modules
The following table lists the fault types of channel-specific diagnostics. You can obtain
detailed diagnostic information via
HW Diagnostics in STEP 7.
Table 5-1
Fault Types of Channel-Specific Diagnostics
Fault type
Diagnostic function in
STEP 7
F-module
Special meaning for F-modules
All
Short circuit to L+ on the unconnected sensor wire
Short circuit to L+ sensor supply
Ground short circuit or defective sensor supply
Internal fault in the read circuit/test circuit
4/8 F-DI/4 F-DO
P output driver defective
Short circuit of output to L+ or output driver
M output driver defective
Short circuit of output to M or output driver
00001
B
1
D
Short circuit
F-Switch
Output driver overcurrent
P output driver defective
Short circuit of output to L+ or output driver
Short circuit of output to M or output driver
00100
B
4
D
Overload
4/8 F-DI/4 F-DO
Output driver overcurrent
00101
B
5
D
Overtemperature
All
-
00110
B
6
D
Open circuit
4/8 F-DI/4 F-DO
Wire break
01001
B
9
D
Fault
All
RAM error
EPROM error
Processor failure (expected DIP switch value/actual
DIP switch value)
Internal fault in the read circuit/test circuit
10000
B
16
D
Parameter assignment
error
All
Parameter assignment error
All
Module-internal supply voltage
10001
B
17
D
Sensor voltage or load
voltage is missing
4/8 F-DI/4 F-DO,
F-Switch
Load voltage is defective or not connected
10011
B
19
D
Communication error
All
Cyclic redundancy check (CRC) error in data
message frame
Monitoring time for data message frame exceeded
All
Discrepancy error
11001
B
25
D
Safety-related shutdown
4/8 F-DI/4 F-DO,
F-Switch
Switching frequency too high