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ifm
Basic Device Manual AS-i ControllerE M4 Target V15
2015-10-30
Error description
AS-i master command errors: error codes M01...M44
254
Error message
Cause(s)
Remedy
M15
Slave aborted 7.4
The addressed 7.4 slave stopped the
transfer.
Possible cause:
Error in the 7.4 data of the PLC.
Possible causes:
1. Interference on the bus
► Remove cause of the interference.
2. Software error in the AS-i slave
► Contact slave manufacturer.
M16
Slave deleted while 7.4 runs
During an active 7.4 protocol transfer
the slave was deleted from the list of
active slaves by the master.
Possible cause:
interference on the bus.
► Remove cause of the interference.
M17
7.4 transfer busy
The attempt was made to start a new
7.4 transfer during an active 7.4
protocol transfer.
► Repeat command.
M18
7.4 Host sequence failure
The sequence bit was set to 1 by the
host or the PLC although a value below
30 was indicated in the "Dlen" data
field.
► Correct value "Dlen".
or:
► Change sequence bit.
M19
7.4 Invalid data length, not MOD 3
divisor
The indicated data length "Dlen" is no
multiple of the factor 3.
► Correct value "Dlen"
A 7.4 protocol transfer always consists
of several data triples.
M20
Unknown command
Master received an unknown
command.
► Check the cause of the wrong
command and correct.
M21
Safety monitor protocol error
During the processing of the safety
monitor protocol a transmission error
occurred.
Possible cause: interference on the bus
► Check and correct the cause of the
wrong command.
M22
Timeout command
► Remove cause of the interference.
M23
Command preconditions failed
Missing the necessary requirements for
the requested master command.
► Correct the concerning parameters.
M24…M32
Not defined
Reserved
M33
Internal safety protocol error
Error during processing of the protocol
of the safety monitor on the AS-i line,
phase "Init A".
► Improve the transmission quality of
the AS-I wiring.