Siemens SIMATIC - Page 510

Other signal modules
7.4 Position decoder module SM 338; POS-INPUT; (6ES7338-4BC01-0AB0)
S7-300 Module data
510 Manual, 06/2017, A5E00105505-AJ
Diagnostic messages of SM338; POS-INPUT
The table below provides an overview of the diagnostic messages of SM 338; POS-INPUT.
Table 7- 5 Diagnostic messages of SM 338; POS INPUT
Diagnostic message
LED
Scope of diagnostics
Module error
SF
Module
Internal error SF Module
External error
SF
Module
Channel error
SF
Module
External auxiliary voltage missing
SF
Module
Module not programmed
SF
Module
Incorrect parameters
SF
Module
Channel information available
SF
Module
Watchdog time-out
SF
Module
Channel error
SF
Channel (encoder input)
Configuration / programming error
SF
Channel (encoder input)
External channel error (encoder error)
SF
Channel (encoder input)
Causes of error and troubleshooting
Table 7- 6 Diagnostic messages of SM 338, causes of error and troubleshooting
Diagnostic message
Possible cause of error
To correct or avoid error
Module error
Any, the module has detected an error.
Internal error Module has detected an error within the
automation system.
External error Module has detected an error outside of the
automation system.
Channel error Indicates that only specific channels are
faulty.
External auxiliary voltage
missing
Supply voltage L+ of the module is missing Feed supply L+
Module not programmed Module requires information whether it
should operate with default system parame-
ters or user parameters.
Message present after power on, until the
CPU has completed the transfer of parame-
ters; configure the module as required.
Incorrect parameters One parameter, or the combination of pa-
rameters, is not plausible
Program the module
Channel information avail-
able
Channel error; module can provide additional
channel information.
Watchdog time-out
Infrequent high electromagnetic interference
Eliminate interference
Channel error Any, the module has detected an error at the
encoder input.
Configuration / program-
ming error
Illegal parameter transferred to module Program the module
External channel error
(encoder error)
Wire-break at encoder cable, encoder cable
not connected, or encoder defective.
Check connected encoder