Siemens SIMATIC NET PROFIBUS Manuel de service Page 46

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Vue de la page 45
Overview of the DP Base Interface
DP Base Programming Interface for CP 5613/CP 5614
46
C79000-G8976-C108-01
Overview of the Sequence of Events
Software EventsHardware Events
Activate hardware event
x
Event on input data
change *)
x
Event on diagnostics
x
Event on cycle start
x
Fast logic on
Initialize required semaphore (during program startup)
Send aknowledged call
x
DP_ds_read/write
x
DP_get_actual_cfg
x
DP_alarm_ack
or notify ready to receive with
DP_enable_event:
x
for alarms/diagnostics
x
for status changes
Wait at semaphore (optional for software events)
Fetch event in process
image
Fetch event with
DP_get_result
Release semaphore (at end of program)
*) Also possible if data changes in the slave module of the CP 5614.
Vue de la page 45
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