Sequence Program Example For Standstill Monitoring (Sos, Ss2 (Stop Category 2)) - Mitsubishi Electric MELSEC Q Series Programming Manual

2 SAFETY OBSERVATION FUNCTION

2.7.2 Sequence program example for standstill monitoring (SOS, SS2 (Stop category 2))

* Start requset
P252
* SS2 delay timer
10
13
* SOS
18
21
The user safety sequence program example (Motion CPU side) for corresponding to
SOS/SS2 (stop category 2) is shown below.
(1) Devices
X101 (Normal signal)
(Note-1)
X200 (Safety signal) : Safety switch input
(Note-2)
Y300
(Note-3)
M3
M11
T17 (100ms timer)
(Note-1): When the start device number of safety signal module is set to 200.
(Note-2): When the speed monitoring I/O device No. is set to 300.
(Note-3): Create the Motion SFC program etc. to stop the positioning with stop request flag
(M3) ON (Not required to embed it in a user safety sequence program.)
(Note-4): Set the deceleration time and SS2 delay time so that a motor completes the
deceleration within SS2 delay time.
(2) Program example
X200
X101
0
Safety
Reset switch
switch
input
M11
Reset switch
ON to OFF
X200
Safety
switch input
M3
Stop
request
T17
SS2 delay
time
: Reset switch input
: SOS request signal
: Stop request flag
: Trailing edge detection flag of reset switch input
: SS2 delay time 1.0s
2 - 22
(Note-4)
PLF M11
Reset switch
ON to OFF
RST M3
Stop
request
SET M3
Stop
request
T17
SS2 delay
time
Y300
SOS
request
END
K10