3
07.96
Description
3-31
Siemens AG 1996 All Rights Reserved 6ZB5 430–0BH02–1AA0
SINUMERIK 805SM / 840C (BS)
Call module diagnostics from the SINEC L2–DP slave module.
Enter station number (here: 5, can be between 2 and 124) in the “Diagnostics
address” byte.
The “Diagnostics a 1” byte always has the value 1.
Read module diagnostics from the SINEC L2–DP slave module.
Load diagnostics word.
Is bit 0 of the “Diagnostics address” byte
set?
If so,
then
no cyclic operation of the slave control
(evaluate in FB yy correspondingly).
Diagnostics address
Diagnostics a 1
Bit 7
6
5
4
3
2
1
0
Bit 7
6
5
4
3
2
1
0
not used
not used
1:
PLC
STOP
in the
slave
station
Note
If an additional slave station with SINEC L2–DP slave module is switched
on while the system is running, PLC STOP is output in the slave station
while the control is being powered up.
Reset of the inputs implemented by the slave module in the master station.
A self-defined sign-of-life bit can enable the user to detect a fault in cyclic
operation of the slave station on the master side.
An output bit of the slave to be monitored is set on the slave side and on the
master side the signal state of the corresponding signal bit is read and
evaluated as follows:
1 signal:
Cyclic operation of slave control running
0 signal:
Fault during cyclic operation of slave control
Based on the signal state of this input bit, the user can have a suitable error
message displayed and can program the behaviour of the control should this
fault occur.
J
.
.
.
L KV 5,1
T PW 252
L PW 252
L KH 0100
UW
L KH 0000
><F
SPB FB yy
.
.
.
Consequences of
a fault
Monitoring of
cyclic operation of
the slave station
by the user
3.3 Description of the L2-DP slave up to V3.x
