Communication / PROFIBUS 09.2008
6SE7087-6QX70 (Version AK) Siemens AG
8.2-72 Compendium Motion Control SIMOVERT MASTERDRIVES
DP-Master
CBP Basic unit
t
WD
Response monitoring (watchdog) CBP TLgOFF
P722.1
or
P695
Fig. 8.2-23 Effect of t
WD
and P722.1 / P695
Response-monitoring time t
WD
Yes
No
P722.x
P695
CPU (AG)
in STOP
IM308B/C
in STOP or
Simatic "Supply
off
CPU (AG)
in STOP
IM 308B/C
in STOP
Simatic
"Supply off"
0 ms
Converter
continues to
run with the
useful data last
received.
Alarm A083
Converter
continues to
run with the
useful data last
received.
Alarm
A083/A084
Converter
continues to
run with the
useful data last
received.
Converter
continues to
run with the
useful data last
received.
Alarm A083
Converter
continues to
run with the
useful data last
received.
10 ms
Fault trip with
F082 after:
Watchdog time
+
10 ms
Fault trip with
F082 after:
Watchdog time
+
10 ms
Converter
continues to
run with the
useful data last
received.
Fault trip with
F082 after
restart of CPU.
Fault trip with
F082 after:
10 ms
Converter
continues to
run with the
useful data last
received.
Table 8.2-13 Interaction of P722 / P695 and response monitoring (watchdog)
Always set parameter P722 / P695 to the value of 10 for operation with
the CBP. Monitoring of process data is thus activated/deactivated by the
value of the response monitoring time solely by the PROFIBUS-DP
master! The converter monitors the entering of process data in the dual-
port RAM from the instant at which the CBP enters valid process data in
the dual-port RAM for the first time. Fault F082 can only be tripped after
this instant!
Process data whose complete control word (PZD1) has the value zero is
not passed on to the dual-port RAM by the CBP (alarm A083)! From
MASTERDRIVES MC V1.62 with CBP2 V>=2.21 and standard telegram
5 (PROFIdrive Profile V3 with equidistance) onwards, the process data
can be transferred to the dual-port RAM irrespective of the content of the
control word.
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