Mitsubishi MELSEC Q Series Programming Manual page 335

Common instruction 1/2

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(1) Unconditionally executes program of designated pointer number within the same program

Note the following points when using the jump instruction.

1. After the timer coil has gone ON, accurate measurements cannot be made if

there is an attempt to jump the timer of a coil that has been turned ON using the

CJ, SCJ or JMP instructions.

2. Scan time is shortened if the CJ, SCJ or JMP instruction is used to force a jump

to the OUT instruction.

3. Scan time is shortened if the CJ, SCJ or JMP instruction is used to force a jump

to the rear.

4. The CJ, SCJ, and JMP instructions can be used to jump to a step prior to the

step currently being executed. However, it is necessary to consider methods to

get out of the loop so that the watchdog timer does not time out in the process.

ON, the loop

5. The device to which a jump has been made with the CJ, SCJ or JMP does not

6. The label (P*) occupies step 1.

Occupies 1 step

7. The jump instructions can be used only for pointer numbers within the same

program file.

8. If a jump is made to a pointer number inside the skip range during a skip

operation, program execution will be taken up following the pointer number of

the jump destination.

Exits the loop when

X7 is turned ON.

Jumps to label P19

when XB turns ON.

Y43 and Y49 remain

unchanged regardless

of whether XB and XC are

turned ON/OFF during the

execution of CJ instruction.

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