Mitsubishi Electric MELSEC-QS Series Safety Application Manual page 133

5
SAFETY APPLICATION CONFIGURATION EXAMPLE (USING A
SINGLE SAFETY PROGRAMMABLE CONTROLLER)
(5) Program using safety FB
FB name
F+2HAND3
F+ANTI
F+EDM
Table 5.40 Safety FBs to be used
Function
This FB provides the two-hand control
Two hand switch Type
functionality (Fixed specified time difference
lll
is 500 ms).
This FB converts two bit inputs (NO/NC pair)
Dual input (NO+NC) to one bit output with discrepancy time
monitoring.
This FB monitors safety equipment such as
External device
an actuator and a contactor and controls a
monitor
safety output.
Figure 5.67 Program using safety FB
Description
Ladder which releases the interlock
when communication failure or I/O error
occurs on the safety remote I/O station on
CC-Link Safety.
Ladder which checks the logic of the
normally closed and normally open contacts
of the two-hand operation switch 1.
Ladder which checks the logic of the
normally closed and normally open contacts
of the two-hand operation switch 2.
Ladder which monitors the status of
the two-hand operation switch.
Ladder which monitors the contact welding
in the contactor.
Connect SM400 (always on) to the
input signal, S_StartReset, of the F+EDM
so that the safety output is turned on
as soon as both operation switches 1 and 2
are activated.
Activate the reset switch to clear an error
occurred in the safety FB.
5.6 Case Examples
5.6.8 Two-hand operation switch
1
2
3
4
5
6
5
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