Chapter 15 Safe Torque Off FunctionME300
15-6
15-6 Timing Diagram Description
The following timing diagrams show the status of relevant signals under different conditions.
15-6-1 Normal operation status
As shown in Figure 4, when S1–DCM and S2–DCM is ON (STO function is not required), the drive
executes Operating or Output Stop according to RUN command.
Figure 4
15-6-2-1 STO, Pr.06-44 = 0, Pr.02-35=0 (external control operation after reset / power on,
0=not valid)
As shown in Figure 5, when both S1–DCM and S2–DCM are OFF during operation (STO
function is required), the drive stops outputting when it enters safe mode regardless of whether
the RUN command is in ON or OFF status.
Figure 5
15-6-2-2 STO, Pr.06-44=0, Pr.02-35=1 (external control operation after reset / power on, 1=
the drive executes RUN if the command remains after reset)
As shown in Figure 6, the action is the same as in Figure 5; however, because Pr.02-35=1, if
the RUN command remains after reset, the drive immediately executes the RUN command
again.
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