Mitsubishi Electric MELSEC-QS Series Safety Application Manual page 115

5
SAFETY APPLICATION CONFIGURATION EXAMPLE (USING A
SINGLE SAFETY PROGRAMMABLE CONTROLLER)
For details on the safety FBs, F+MODSEL, F+GMON, F+ENBLSW, and F+EDM, refer
to the following.
In this example, an enable switch with no monitor signal for position 3 is used.
Therefore, SM400 (always ON) is connected to the input signal, S_EnableSwCh2, of
the F+ENBLSW. (S_EnableSwCh2 is a signal for the contacts E3 and E4 of the
connected enable switch.)
When an enable switch with monitor signal for position 3 is used, connect the
corresponding signal to the input signal, S_EnableSwCh2, to monitor the status of
position 3.
Figure 5.54 Program using safety FB
QSCPU Programming Manual (Safety FB)
Ladder which monitors the status of
the enable switch.
This safety FB is enabled only when
the manual mode is selected.
Ladder which monitors the status
of the safety switch.
This safety FB is enabled only when
the automatic mode is selected.
The safety FB is enabled by activating
the reset switch after the programmable
controller is powered on or after
the light curtain is blocked and the safety
output is turned off.
Ladder which monitors the contact welding
in the contactor.
The safety output of the safety FB is turned on
again by activating the start switch after
the enable status is confirmed.
Activate the reset switch to clear an error
occurred in the safety FB (in automatic mode).
5.6 Case Examples
5.6.6 3-position enable switch
1
2
3
4
5
6
5
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