Mitsubishi Electric M800VW Series Programming Manual page 273

Plc programming

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M800V/M80V Series PLC Programming Manual (1/2)

8 Function Instructions

8.5 Program Branch Instructions

 A program of specified pointer No. in the same program file is executed unconditionally.

Note the following points when using the jump instruction.

(1) Jump instructions can be used only for pointer numbers within the same program file.

(2) 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 or JMP instructions.

(3) Scan time is shortened if the CJ or JMP instruction is used to force a jump to the rear.

(4) The CJ and JMP instructions can be used to jump to a step prior to the step currently being executed.

(5) The device to which a jump has been made with CJ or JMP does not change.

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

 Operation errors

 In the following cases, an arithmetic error occurs, the error flag (SM0) turns ON, and an error code is stored at SD0.

- A pointer number which is not in use as a label in the same program has been designated.

(Error code: 20 or 85)

- A common pointer in the other program has been designated. (Error code: 20 or 85)

IB-1501667-B

Jumps to P8 label when M3 goes ON.

Executes when M3 is OFF.

Jumps to label P19 when XB goes ON.

Y43 and Y49 do not change regardless of

whether XB and XC are ON/OFF during

execution of CJ instruction.

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