Chapter 3 Electrical Wiring｜VP3000
106
3. Pr.H0-14 STO Auto Reset = 0 Disable, manual-reset is valid
The STO function is triggered after the drive runs, the original STO1 is OFF (non-conductive)
only for a brief time and then turns back to ON (conductive). When it is OFF, the drive stops
outputting immediately. 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 valid under the manual RESET command when the two STO
channels are both ON (conductive), the drive clears the fault message, after the RESET
command and the Fault Restart Delay Time (Pr.H0-10) is reached, the drive receives the RUN
command and resumes to operate
Figure 3-51
STO1–SCM
(Through filter)
STO2–SCM
(Through filter)
STO1–SCM
STO2–SCM
Drive status
Filter Time
No error
Drive output
STO
error/warn
ON
OFF
ON
OFF
ON
ON
ON
OFF
ON
ON
Reset command
RUN
RUN command
RUN
STOP
Reset
No error
ON
H0-10 Fault Restart Delay Time
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
H0-13 STO Indn Delay Time
H0-12 STO1/2 Allowable Duration
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