Mitsubishi Electric MELSEC-QS Series Safety Application Manual page 153

6
SAFETY APPLICATION CONFIGURATION EXAMPLE (USING
SEVERAL SAFETY PROGRAMMABLE CONTROLLERS)
(6) Sequence program using safety FB
Figure 6.10 to Figure 6.12 show sequence programs used in safety programmable
controllers (1) to (3).
FB name
F+EDM
F+ESTOP
Figure 6.10 Safety FB program for safety programmable controller (1)
Table 6.10 Safety FBs used
Function name
External device monitor
Emergency stop
6.4.1 Emergency stop circuit (stop of all equipment)
Description
This FB monitors safety equipment such
as an actuator and a contactor and
controls a safety output.
This FB is a safety-related FB for
monitoring an emergency stop button.
This FB can be used for emergency
switch off functionality (stop category 0).
Ladder which releases the interlock when
communication failure or an I/O error occurs
on the safety remote I/O station on
CC-Link Safety.
Ladder which releases the interlock when
an error occurs on CC-Link IE Field Network.
Ladder which converts the Reset input
bit of the safety FB, F+EDM.
Ladder which notifies an emergency stop
request to the safety programmable controller
(2) and (3).
Ladder which monitors the status of the
emergency stop switch.
The safety FB is enabled by activating the
reset switch after the programmable controller
is powered on or after the emergency stop
switch is activated and the safety output is
turned off.
Ladder which monitors the contact welding
in the safety relay.
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.
6.4 Case Example
1
2
3
4
5
6
6
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