Chapter 3 Electrical Wiring｜VP3000
104
3-5-6 Operating Sequential Diagram
The STO1 and STO2 circuits must be conducted (ON: default short-circuit of STO terminal) when the
STO function is under general operation, and then the drive can operate normally. If any one of the
STO circuit is disconnected (OFF), the drive is unable to run, or stop running. The following sequence
diagrams describe the signal status under different conditions:
1. Pr.H0-14 STO Auto Reset = 0 Disable, manual-reset is valid
The STO function is triggered after the drive runs, STO1 changes from ON (conducting) to OFF
(non-conducting), the drive stops output immediately, and starts counting after the filter time, and
then the STO2 is OFF. When the counting time of two circuits of STO are less than then
allowable difference time of STO1 / STO2 (Pr.H0-12), and the STO indication delay time (Pr.H0-
13) is reached, the drive displays STO fault message.
Since the STO fault message is invalid under the manual RESET command when the two STO
channels are both OFF (non-conductive), the drive still cannot run after receiving the RUN
command.
Figure 3-49
STO1–SCM
(Through filter)
STO2–SCM
(Through filter)
H0-13 STO Indn Delay Time
H0-12 STO1/2 Allowable Duration
STO1–SCM
STO2–SCM
Drive status
Filter Time
No error
Drive output
STO
error/warn
H0-14 STO Auto resets = 0 (STO fault resets after receiving the RESET command)
H0-13 STO Indn Delay Time
H0-12 STO1/2 Allowable Duration
ON
OFF
ON
OFF
OFF
ON
OFF
ON
OFF
Reset command
RUN
RUN command
RUN
STOP
Reset
ON
To Next Page
Loading...
