Mitsubishi Electric MELSEC-QS Series Safety Application Manual page 73

5
SAFETY APPLICATION CONFIGURATION EXAMPLE (USING A
SINGLE SAFETY PROGRAMMABLE CONTROLLER)
(4) Device numbers to be used
The following device numbers are used in the sequence program.
Safety/standard
Safety
Safety
Safety
Standard
Standard
Standard
(5) Sequence program
The sequence program performs the following processing.
The following shows the constant and internal devices used in the program.
(a) Way of using the constant
Table 5.13 Device numbers to be used
External device
Safety switch
Safety relay
Safety relay (check for welding)
Reset switch
Start switch
Stop switch
Figure 5.18 Sequence program
K indicates decimal number.
Example) K1 = 1 of decimal number
Device number
X100 or X101
Y202
X202 or X203
X140
X142
X144
Ladder which checks the off fall of the reset
switch, accepts reset request, and clears the
interlock for the CC-Link Safety.
Ladder which confirms the interlock processing
completion and cancels interlock clear request.
Ladder which checks the off fall of the start
switch and accepts start request.
Ladder which checks safety relays for welding.
T0 is a delay timer which waits for safety
relays to actually be turned off after the off
output of the safety relays.
Ladder which checks whether a robot can
start and continue operation.
Ladder which clears start request/reset
request when safety cannot be confirmed.
Ladder which controls outputs to safety relays.
5.6 Case Examples
5.6.2 Door monitor circuit
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2
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4
5
6
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