Other Instructions - Omron CJ - INSTRUCTIONS REFERENCE MANUAL 07-2009 Reference Manual

Programmable controllers

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3. Instructions

Other Instructions

Applicable Program Areas

Function block

Negative Flag

*1 In CJ2, CS1-H, CJ1-H, CJ1M, and CS1D (for Single-CPU System) CPU Units, these Flags are left unchanged.

In CS1 and CJ1 CPU Units, these Flags are turned OFF.

When the execution condition is ON, STC(040) turns ON the Carry Flag (CY). Although STC(040) turns

the Carry Flag ON, the flag will be turned ON/OFF by the execution of subsequent instructions which

affect the Carry Flag.

ROL(027), ROLL(572), ROR(028), and RORL(573) make use of the Carry Flag in their rotation shift

operations. When using any of these instructions, use STC(040) and CLC(041) to set and clear the

When the execution condition is ON, CLC(040) turns OFF the Carry Flag (CY). Although CLC(040)

turns the Carry Flag OFF, the flag will be turned ON/OFF by the execution of subsequent instructions

which affect the Carry Flag.

+C(402), +CL(403), +BC(406), +BCL(407), -C(412), -CL(413), -BC(416), and -BCL(417) make use of

the Carry Flag in their addition operations. Use CLC(041) just before any of these instructions to

prevent any influence from other preceding instructions.

ROL(027), ROLL(572), ROR(028), and RORL(573) make use of the Carry Flag in their rotation shift

operations. When using any of these instructions, use STC(040) and CLC(041) to set and clear the

The +(400), +L(401), +B(404), +BL(405), -(410), -L(411), -B(414), and -BL(415) instructions do no

include the Carry Flag in their addition and subtraction operations. In general, use these instructions

when performing addition or subtraction.

Block program areas

Step program areas

Sets the Carry Flag (CY).

Turns OFF the Carry Flag (CY).

Interrupt tasks

CS/CJ/NSJ Series Instructions Reference Manual (W474)

SFC action or transition

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