The Impact Of Plc Run Or Stop On Variables And Devices; Relationship Between Motion Program And Motion Bus - Delta DVP-15MC Series Operation Manual

DVP-15MC Series Motion Controller Operation Manual
7.2 The Impact of PLC RUN or STOP on Variables and
Devices
When DVP-15MC series motion controller is switched from RUN to STOP, variables and devices keep
current values. When DVP-15MC series motion controller is switched from STOP to RUN, users can select
one option that the values of variables and non-latched devices are cleared or retained as below.

The values of variables and non-latched devices are cleared.
When DVP-15MC series motion controller is switched from STOP to RUN, the values of variables and
non-latched devices are cleared and restored to the initial values. If variables and non-latched devices
have no initial values, the values of variables and non-latched areas will be restored to the default value
0.

The values of variables and devices are retained.
When DVP-15MC series motion controller is switched from STOP to RUN, variables and devices
keep current values.
7.3

Relationship between Motion Program and Motion Bus

DVP-15MC series motion controller makes the synchronization achieved through issuing SYNC signal in
the method of broadcasting while more than one servo is connected with DVP-15MC series motion
controller. The servo drives receive the control data sent by DVP-15MC series motion controller. But the
control data received will not be effective right away until the SYNC signal comes to the servos so as to
realize the synchronization of multiple servos.
In the following figure, DVP-15MC series motion controller is connected with 4 servo drives and T is the
synchronization period. The four servo drives receive control data at different time (t1, t2, t3 and t4) but the
control data received are not effective at once. As the servo drives receive SYNC signal, the control data
will go effective immediately.
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