Service and maintenance
5.3 FB error messages
Communications module RF120C with application blocks for S7-1200 and S7-1500
Operating Instructions, 07/2013, C79000-G8976-C328-01
55
Byte
Description
0
1
2
E4h FEh 01h Short circuit or overload of the 24 V outputs
•
The reader is using too much current.
•
The reader cable is causing a short-circuit.
Possible consequences:
•
The affected output is turned off
•
All outputs are turned off when total overload occurs
•
A reset can only be performed by turning the 24 V voltage off and on again
•
and then starting "Reset_Reader"
E4h FEh 03h
•
Error in the connection to the reader; the reader is not answering.
–
The cable between the communications module and reader is wired incorrectly or there is a
cable break
–
The 24 V supply voltage is not connected or is not on or has failed briefly
–
Automatic fuse on the communications module has blown
–
Hardware defect
–
There is another reader in the vicinity and is this is active
–
Execute init_run after error correction
•
The antenna of the reader is turned off. A tag command to the communications module was
started in this status.
–
Turn on the antenna with the command "antenna on/off."
–
The antenna is turned on (off) and has received an additional turn-on (turn-off) command
•
The mode is unknown in the SET_ANT command
•
The antenna on the reader is turned off or the antenna cable is defective
E4h FEh 04h The reader does not have enough buffer on the communications module or reader to store the
command temporarily.
E4h FEh 07h Start-up message from communications module. The communications module was off and has not
yet received a Reset_Reader (WRITE-CONFIG) command.
•
Execute an init_run
•
The same physical address in the HW_CONNECT parameter is being used more than once.
Check your HW_CONNECT parameter assignments.