Moeller LE 4-505-BS1, Hardware And Engineering

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Checking status and
diagnostic messages in the
user program
63
02/98 AWB 27-1314-GB
END_VAR
Program:
LD DiaLE
ST Marker
LE master status byte
The LE master status byte contains information on
the diagnostic status of the master function
Structure of the LE master status byte:
Bit 0: 0: OK
1: Configuration error
Bit 1: 0: o.k.
1: ASi power fail/low)
Bit 2: 0: o.k.
1: Slave with address 0 detected)
Bit 3: 0: o.k.
1: ASi-LE offline (no data transfer
between master and slaves)
Bit 4 to bit 7: Reserved
Byte operand: ISB0.0.X.1
X = 1:
1st. module of the PS 4
X = 2: 2nd. module of the PS 4
Bit operand: IS 0.0.X.1.Z
Z = Bit 0...7
Example
Declaration of variables
VAR
DiaLEM AT% ISB 0.0.1.1: Byte; LE master status
byte
Marker : Byte; Any variable
END_VAR
Program:
LD DiaLEM
ST Marker
Bit-No. 7 6 5 4 3 2 1 0
H1314G.BK Seite 63 Freitag, 2. Juli 1999 9:02 09