Omron SYSMAC CV Series Operation Manual page 295

Ladder diagrams

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Symbol Math Instructions

–BL D00100 D00110 D00120

–BCL D00200 D00210 D00220

Program Example

–BCL Operation

When CIO 000001 is ON in the following example, the content of D00211 and

D00210 are subtracted from the content of D00201 and D00200, and the result

including the carry is output in eight-digit BCD to D00221 and D00220. CY is set

if the result is negative

Example: 9,583,960 – 17,072,641 = –7,488,681.

In this example, the eight-digit BCD content of CIO 0121 and CIO 0120 is sub-

tracted from the content of CIO 0201 and CIO 0200, and the result is output in

eight-digit BCD to D00101 and D00100. The result is negative, so the instruction

at (2) will be executed, and the true value will then be output to D00101 and

The Carry Flag (A50004) will be turned ON, so the actual number is –7,488,681.

Because the content of D00101 and D00100 is negative, CY is used to turn ON a

self-holding bit that turns ON a bit indicating a negative value.

–BL #00000000

Address Instruction

Address Instruction

Section 5-20

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