Mitsubishi Electric MELSEC iQ-F FX5 - Page 116

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10 ONLINE CHANGE
10.1 Online Ladder Block Change
The operation when a pulse type instruction is included in the range of an online ladder
block change
The operation when a pulse related instruction is included in the range of an online ladder block change is as follows.
■Rising instruction
When a rising instruction exists within the range to be changed, the rising instruction will not be executed if the execution
condition (OFF to ON) is fulfilled at completion of online program change.
■Falling instruction
When a falling instruction exists within the range to be changed, the falling instruction will not be executed even if the
execution condition (ON to OFF) is fulfilled at completion of online program change.
Online change (ladder block) when another function is performed
Online ladder block change cannot be executed while executing the backup/restoration function. (Page 207 DATA
BACKUP/RESTORATION FUNCTION) Confirm that the backup/restoration function is not being executed before executing
the online ladder block change.
Pulse type instruction Description
Rising instruction
(PLS and P instructions)
When a rising instruction exists within the range to be changed, the rising instruction will not be executed if the
execution condition (OFF to ON) is fulfilled at completion of online program change.
Falling instruction
(PLF and F instructions)
When a falling instruction exists within the range to be changed, the falling instruction will not be executed even if the
execution condition (ON to OFF) is fulfilled at completion of online program change.
(1) The rising instruction will not be executed even if the execution condition is OFF to
ON.
(1) The falling instruction will not be executed even if the execution condition is OFF to
OFF.
(2) If online program change and transition of ON to OFF occur simultaneously, the falling
instruction will not be executed.
Online change completion
END
1 scan
END END00 0
OFF→OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON→ON
Status of X0
X0
M0
X0
M0
X0
M0
(1)
[ PLS M0 ]
X0
A
A
OFF→ON
Online change completion
END
1 scan
END END00 0
OFF → OFF
ON
OFF
OFF
OFF
OFF
ON
ON
ON
ON→
OFF
Status of X0
X0
M0
X0
M0
(1)
[ PLF M0 ]
X0
A
A
(2)