Festo Контроллер двигателя SFC-ST - Manual (Page 98)

A. Technical appendix
A−14
Festo P.BE−SFC−DC−PB−S7−E N en 0604NH
Start/stop record
Record_No
Stop
Ack_Start
MC
Actual_Record_No
N − 1 N N + 1
N − 1 N
1
0
1
0
1
0
1
0
1
0
1
2
3
4
6
1
0
1
0
Drive_is_moving
Start_
Positioning_Task
N + 1
5
1
Prerequisite: Ack_Start = 0
2
Rising edge at Start_Positioning_Task
causes the new record number N to be
accepted and Ack_Start to be set
3
As soon as Ack_Start is recognized by
the PLC, Start_Positioning_Task may
be set to 0 again
4
The controller reacts with a falling
edge at Ack_Start
5
As soon as Ack_Start is recognized by
the PLC, the next record number may
be started
6
A currently running positioning task
can be stopped with Stop"
Fig. A/3: Sequence diagram Start/stop record