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Example 2
Fig.5 Safety system example 2 – STOP synchronous with EM and fault detection through RUN output.
For safety stop, configure the wiring as shown in Fig.4 above.
Note: the above wiring is configured to prevent restart in case of a fault.
XS0 should be connected to RUN terminal and XS1 should be connected to SE, because polarity of XS0 is
positive, XS1 is negative.
The parameter No.190 must be set to ‘199’. This setting makes the RUN output to turn off in case of
failure.
After the power-up, to reset the safety stop mode, press the START switch, and also press the STF switch,
then start the motor rotation.
In the above Fig.4, wired example2, in the event of reset of ‘safe-condition’ the motor rotation will not occur
until STF is pressed.
(for normal ‘non-safety’ STF/STOP function, please refer to your drive’s User Manual)
ATTENTION
To prevent restart in case of recovering from input power loss of drive, 3-wired connection for STF/STOP
control is recommended.
In case of 2-wire connection and using latching type switch to short between STF and SD/PC for starting,
ensure the compliance with safety requirement for the restarting when the drive recover from input power
loss.
S2
S1
SC
FR-D700
START
+24V
EM
QS90SR2SN-Q
K1
CPU
X0 X1
COM0 COM1
24G
Safety
Logic
Circuit
XS0 XS1 Z10 Z00 Z20
Z11 Z01 Z21
K2
DC24V
RUN
RST
UVW
MITSUBISHI MELSEC Safety relay unit
Gate
Driver
Gate
Driver
IGBTs
IM
SE
STF
STOP
STF
STOP
SINK
SD