Mitsubishi Electric MELSEC-Q Series User Manual page 58

4 SEQUENCE PROGRAM CONFIGURATION & EXECUTION
CONDITIONS
4 - 19
(2) Response lag
Output response lags of up to 1 scans can result from input module changes.
(See Fig.4.10)
Ladder examples
DX5
55
Fastest possible DY5E ON
The fastest possible DY5E output ON occurs if the DX5 input is switched ON
immediately prior to the step 55 operation. If DX5 is ON when step 55's LD DX5 is
executed, DY5E will switch ON within that scan.
This condition represents the minimum time lag between the DX5 input ON and the
DY5E output ON.
Slowest possible DY5E ON
The slowest possible DY5E output ON occurs if the DX5 input is switched ON
immediately after the step 55 operation. In this case, the DY5E output will switch ON
during the next scan.
This condition represents the maximum time lag (1 scan) between the DX5 input ON
and the DY5E output ON.
Fig.4.9 Output "Y" Change in Response to Input "X" Change
DY5E
LD DX5
OUT DY5E
55 56
0
ON
OFF
DX5
ON
OFF
DY5E
LD DX5
OUT DY5E
END 0
0 55 56
ON
OFF
DX5
OFF
DY5E
Lag time
(Maximum of 1 scan)
MELSEC-Q
Ladder for switching the DY5E output
ON in response to an DX5 input ON.
55 56
ON
4 - 19