Flexible Automation
Central processing unit ZS400
4-8
1070 072 143-101
Display Meaning
upper lower
System bus error
Cause:
A system module assigns the system bus for too
long
Fault remedy:
Switch control off and on again; generally the de
fective system module must be replaced
DESI bus master not ready
Cause:
PLC stop time of the DESI bus master not yet
elapsed
Configuration error system data fields/mail boxes
Cause:
The set start addresses and lengths cause overlap
ping
Reference list error
Cause:
The assignment at the ZS400 peripheral bus with
I/O modules does not correspond with the refer
ence list in OM2.
Cycle time error
Programming error
Cause:
D Modulstack overflow,
D User stack overflow
D User stack underflow
D Data module not active
D Abort direct access
D Opcode error
Programming error
Cause:
D Parameter error
D Address error
D Range exceeded
D Module does not exist
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