Delta VFD11AMS21AFSHA, User Manual

Page: 439 / 445

Chapter 17 Safe Torque Off Function

MS300
(High Speed Model)
17-6
17-6 Timing Diagram Description
The following timing diagram shows the status of relevant signals under different conditions:
17-6-1 Normal operation status
As shown in Figure 4: When S1~DCM and S2~DCM is ON (STO function is not required), the
drive will execute “Operating” or “Output Stop” according to RUN command.
Figure 4
17-6-2-1 STO, Pr. 06-44=0, Pr. 02-35=0 (Selection of external control operation after
reset / power on, 0=not valid)
As shown in Figure 5: When both of S1~DCM and S2~DCM are OFF during operation
(STO function is required), the drive will stop outputting when enter safe mode regardless
of Run command is ON or OFF status.
Figure 5
RUN command
RUN
STOP
Drive output
S1~DCM
input status
Operating
Output stop
S2~DCM
input status
ON (no STO function n eed Pr.0 6-44=0 )
,
ON (no STO function n eed Pr.0 6-44=0 )
,
RUN
O N
O N
O FF
O FF
ON
O N
STOP
RUN
Operat ing Output stop
RUN co mmand
Drive out put
S1~DCM
input status
S2~DCM
input status
ON (STO function is not required, Pr. 06-44=0)
ON (STO function is not required, Pr. 06-44=0)