Fail-Safe Blocks
Fail-Safe Systems
8-132 A5E00085588-03
8.15.2 Error Information at the Outputs of the Driver Blocks
The following errors are detected at the outputs of the F module drivers (F_M_DI8,
F_M_DI24, F_M_DO10, F_M_DO8 and F_M_AI6):
Output Cause Remedies
DIAG_n Diagnostic information for SM n:
Byte 0
• Bit 0: TIMEOUT error on SMn Check the set monitoring time in
HWCONFIG
Check the PROFIBUS connection between
the CPU and F-I/O
Read out the module diagnosis
• Bit 1: Common error on SMn Check the wiring
Read out the module diagnosis
• Bit 2: CRC value/watchdog error on SMn Compare the CRC_IMPx parameter with
the corresponding CRC check sum
parameters from HWCONFIG
Download the configuration from
HWCONFIG, compile the changes to the
Safety Program , download them again,
and carry out a cold restart.
Switch the voltage off and on at the F-I/O
Check the PROFIBUS connection between
the CPU and F-I/O
Read out the module diagnosis
• Bit 3: Reserved
• Bit 4: TIMEOUT error on CPU
or internal CPU fault
Check the PROFIBUS connection between
the CPU and F-I/O
Download the configuration from
HWCONFIG, compile the changes to the
Safety Program , download them again,
and carry out a cold restart.
Read out the module diagnosis
or replace the CPU
• Bit 5: Watchdog error on CPU
or internal CPU fault
Check the PROFIBUS connection between
the CPU and F-I/O
or replace the CPU
• Bit 6: Check value error (CRC) on CPU
or internal CPU fault
Compare the CRC_IMPx parameter with
the corresponding CRC check sum
parameters from HWCONFIG
Download the configuration from
HWCONFIG, compile the changes to the
Safety Program, download them again,
and carry out a cold restart.
Switch the voltage off and on at the F-I/O
or replace the CPU
• Bit 7: Reserved
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