Table 7-6 Diagnostics Messages Of Sm 338, Causes Of Error And Troubleshooting - Siemens SIMATIC S7-300 Manual

Other signal modules
7.4 Position decoder module SM 338; POS-INPUT; (6ES7338-4BC01-0AB0)
Diagnostics message
Channel information available
Watchdog time-out
Channel error
Configuration / programming error
External channel error (encoder error)
Causes of error and troubleshooting
Table 7-6 Diagnostics messages of SM 338, causes of error and troubleshooting
Diagnostics message
Module error
Internal error
External error
Channel error
External auxiliary voltage
missing
Module not programmed
Incorrect parameters
Channel information
available
Watchdog time-out
Channel error
Configuration /
programming error
External channel error
(encoder error)
7-20
Possible cause of error
Any, the module has detected an error.
Module has detected an error within the
automation system.
Module has detected an error outside of the
automation system.
Indicates that only specific channels are
faulty.
Supply voltage L+ of the module is missing
Module requires information whether it
should operate with default system
parameters or user parameters.
One parameter, or the combination of
parameters, is not plausible
Channel error; module can provide additional
channel information.
Infrequent high electromagnetic interference
Any, the module has detected an error at the
encoder input.
Illegal parameter transferred to module
Wire-break at encoder cable, encoder cable
not connected, or encoder defective.
LED Scope of diagnostics
SF Module
SF Module
SF Channel (encoder input)
SF Channel (encoder input)
SF Channel (encoder input)
To correct or avoid error
Connect supply L+
Message present after power on, until the
CPU has completed the transfer of
parameters; configure the module as required.
Program the module
Eliminate interference
Program the module
Check connected encoder
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04