Siemens SINUMERIK 840DiE sl Manual page 188

8 PROFIBUS DP Communication
8.3 Creating a PROFIBUS configuration
DP cycle
T
DP
8-188
Note
You are advised not to activate the option "Times Ti and To same for all slaves"
in the "Synchronization of the slaves" group.
On tab card "Clock synchronization" the following parameters are now set for
each type of DP slave:
– Equidistant DP cycle T
– Master application cycle T
– Actual value acquisition Ti
– Setpoint transfer T
o
.
DP slave properties
General Configuration Cycle synchronization
Synchronize drive to equidistant DP cycle
Network settings in ms
Isochronous bus cycle activated
Isochronous DP cycle:
2.000
Master application
2.000
cycle [ms]:
DP cycle [msec]: 2.000
Time Ti [ms]
0.125
(actual value acquisition):
Time To [ms]
1.500
(setpoint acceptance):
Comparison
OK
Fig. 8-9 Dialog box: DP slave properties
The "DP cycle" of DP slave S120 must be set to the cycle time of the DP master
displayed under >"Isochronous DP cycle" in group box "Network settings in ms".
Notice
For DP cycle time T the following condition must be fulfilled:
DP
DP cycle = isochron. DP cycle
DP
MAPC
Cyclic portion of isochronous master
Factor
Increment/base time [ms]
= 1 x 2.000
Factor
Increment/base time [ms]
x
= 16 0.125
Factor
Increment/base time [ms]
x
= 1 0.125
Factor
Increment/base time [ms]
x
= 12 0.125
© Siemens AG 2007 All Rights Reserved
SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
01/2007
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