Mitsubishi Electric MELSEC-QS Series Safety Application Manual page 112

5
SAFETY APPLICATION CONFIGURATION EXAMPLE (USING A
SINGLE SAFETY PROGRAMMABLE CONTROLLER)
(4) Device numbers to be used
Safety/standard
Safety
Safety
Safety
Safety
Standard
Standard
Standard
Standard
(5) Sequence program
5
5.6 Case Examples
- 63
5.6.6 3-position enable switch
The following device numbers are used in the sequence program.
Table 5.30 Device numbers to be used
External device
Safety switch
Enable switch
Contactor
Contactor (check for welding)
Reset switch
Start switch
Manual mode
Automatic mode
The sequence program performed the following processing.
Figure 5.51 Sequence program
Device number
X100 or X101
X10C or X10D
Y101
X10A or X10B
X120
X121
X122
X123
Ladder which checks the contact welding
of the reset switch.
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 enables the safety FB by
activating the reset switch after the
programmable controller is powered on or
after the safety output is turned off.
Ladder which checks the welding of the start
switch.
Ladder which turns on the safety output again
by activating the start switch after the enable
status is confirmed.
Ladder which checks the contact welding in
the contactor.
T0 is an off delay timer for the contactor.
Ladder which controls an output to the
contactor.
Ladder which detects the mode switching
when the contactor output is turned on.
Ladder which checks the mode switching
(automatic manual) while the enable switch
is held down.