Siemens SINUMERIK 840D sl Function Manual page 207

05.08
PROFIsafe clock cycle and DP cycle time
When parameterizing the PROFIsafe clock cycle, in order to ensure a correct
PROFIsafe communication, the DP cycle time, determined by HW Config must be
observed (refer to Chapter 7.2.5 "Parameterizing the PROFIsafe communication
(NCK)").
After the station has been fully configured, the DP cycle time can be determined by
activating the equidistant (isochronous) bus cycle:
Open the properties dialog box of PROFIBUS in HW Config: DP master of the con-
figured station:
Dialog: Properties – DP master system
Tab: General
Subnetwork, button: Properties
Dialog: Properties – PROFIBUS
Tab: Network settings
Button: Options
Dialog: Options
Tab: Equidistance
Checkbox:
(Note: Activate the equidistant bus cycle using the checkbox: "Activate equidistant
bus cycle/recalculate equidistant time". This can be used to determine the DP
cycle time. The equidistant bus cycle should then be deactivated again.
Display field:
(Note: The value calculated by HW Config and displayed in the display field: "Equi-
distant bus cycle" has the same significance as the DP cycle time)
Abort
Abort
Abort
Note
The DP cycle time calculated by the HW Config is required as guideline to
parameterize the PROFIsafe clock cycle (refer to Chapter 7.2.5 "Parameterizing
the PROFIsafe communication (NCK)").
The information and instructions in the online documentation should be carefully
observed before changing the DP cycle time. "Help" of the relevant dialog box).
© Siemens AG 2008 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
Activate equidistance bus cycle/
Re–calculate equidistant type
Equidistant bus cycle
Connecting Sensors/Actuators
7.2 Connecting I/O via PROFIsafe
7-207