Siemens SINUMERIK 840DiE sl Manual page 186

8 PROFIBUS DP Communication
8.3 Creating a PROFIBUS configuration
Activation of the
isochronous
DP cycle
Dialog box:
Start
8-186
If you double–click an S120 DP slave in the station window, the dialog box: "DP
Slave Properties" opens.
It is recommended that the isochronous DP cycle be enabled for all DP slaves
S120 by enabling the isochronous DP cycle for the selected DP slave S120,
and then performing an alignment.
During adjustment all the values displayed in dialog box:
S
DP slave properties
Tab card: Cycle synchronization
are transferred to all DP slaves of the same type in the configuration, here DP
slave S120.
Dialog box: DP slave properties
Tab card: Cycle clock synchronization
Radio button: "Synchronize drive to isochronous DP cycle"
Button: "Adjust"
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]
0.625
Setpoint acceptance:
Comparison
OK
Fig. 8-7 Enabled isochronous DP cycle
Notice
If there are different types of isochronous DP slaves in a S7 project, e.g.
different SINAMICS drives, ADI4, etc., the following steps:
1. Synchronize drive to equidistant DP cycle
2. Perform adjustment
must be performed for each type of DP slave first before you can continue to
set the other parameters.
Component Data_Exchange_Time Tdx:
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
= 5 0.125
Cancel
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SINUMERIK 840Di sl Manual (HBIsl) – 01/2007 Edition
01/2007
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