Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual page 169

■Online change (ladder block) (with deleting instruction)
When an instruction is deleted by the online change (ladder block), registrations of the device test with execution conditions
for the deleted instruction and for the instruction immediately after the deleted instruction are disabled.
In the following example, an instruction is deleted by the online change (ladder block). In this case, when the device test with
execution conditions is registered to the instruction immediately after the deleted instruction, the relevant registrations are
disabled upon the execution of the online change (ladder block).
Before
Registration 1 Registration 2 Registration 3
After
Registration 1 Registration 2
(1) The registration of the device test with execution conditions is disabled because the instruction is located immediately after the deleted instruction.
(2) The registration of the device test with execution conditions is disabled because the instruction where it is registered is deleted.
However, when an instruction to be deleted is adjacent to an instruction to be changed, registration of the device test with
execution conditions of the instruction immediately after the instruction to be deleted is not disabled.
In the following example, an instruction to be deleted is adjacent to an instruction to be changed. Therefore, even when the
device test with execution conditions is registered to the instruction immediately after the instruction to be deleted, the
relevant registration is not disabled by the execution of the online change (ladder block).
Before
Registration 1 Registration 2 Registration 3
After
Registration 1 Registration 2
Disabled
(1) Although this instruction is located immediately after the deleted instruction, the registration of the device test with execution conditions is not disabled
because the deleted instruction is adjacent to the changed instruction.
(2) The registration of the device test with execution conditions is disabled because the instruction where it is registered is changed.
(3) The registration of the device test with execution conditions is disabled because the instruction where it is registered is deleted.
AND M15 is deleted.
(1)
Registration 3
Disabled Disabled
(2)
AND X11 is changed to AND X16.
AND M15 is deleted.
Registration 3 (1)
Disabled
(2) (3)
10 TEST FUNCTION
10.2 Device test with execution conditions
10
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