Safety Stop Function - Mitsubishi Electric FR-D720S SC EC Instruction Manual

Control circuit specifications
3.4.3

Safety stop function

The terminals related to the safety stop function are shown below. For the rated specification of
each terminal refer to Tab. 3-12.
Terminal
S1
S2
SC
SO
RUN
SE
Tab. 3-15: Safety stop function terminals
In the initial status, terminal S1 and S2 are shorted with terminal SC by shortening wire.
Remove the shortening wire and connect the safety relay module when using the safety
stop function.
In the initial setting, safety monitor output signal (SAFE signal) is assigned to terminal SO.
The function can be assigned to other terminals by setting "80" (positive logic) or "180"
(negative logic) to any of Pr. 190, Pr. 192 or Pr. 197.
In the initial setting, inverter running (RUN signal) is assigned to terminal RUN. Set "81" to
Pr. 190 to assign SAFE2 signal. The function can be assigned to other terminals by setting
"81" (positive logic) or "181" (negative logic) to any of Pr. 190, Pr. 192 or Pr. 197.
At an internal safety circuit fault, E.SAF or E.CPU is displayed on the operation panel.
NOTES
Use SAFE signal for the purpose to monitor safety stop status. SAFE signal cannot be used
as safety stop input signal to other devices (other than the safety relay module.)
SAFE2 signal can only be used to output an alarm or to prevent restart of an inverter. The
signal cannot be used as safety stop input signal to other devices.
3 - 22
Description
For input of safety stop channel 1.
For input of safety stop channel 2.
Common terminal for S1, S2 signals.
SC is connected to terminal PC internally.
For output of safety stop condition.
SAFE
The signal is output when inverter output is shut
signal
off due to the safety stop function.
As output for failure detection and alarm.
SAFE2
Outputs when there is no internal safety circuit
signal
fault .
Common terminal for open collector outputs
(terminals RUN and SO)
Between S1 and SC / S2 and SC
Open: In safety stop mode.
Short: Other than safety stop mode.
—
OFF: Drive enabled or drive stop
(at an internal safety circuit
fault)
ON: Drive stop (no internal safety
circuit fault)
OFF: Internal safety circuit fault
ON: No internal safetycircuit fault )
—
Wiring