Comparison Instructions; Compare - Cmp(20) - Omron CQM1H - PROGRAM Programming Manual

Programmable controllers; inner boards

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Comparison Instructions

5-19-1 COMPARE – CMP(20)

When the execution condition is OFF, XFRB(––) is not executed. When the

execution condition is ON, XFRB(––) copies the specified source bits to the

specified destination bits. The two rightmost digits of C specify the starting

bits in S and D and the leftmost two digits indicate the number of bits that will

Note Up to 255 (FF) bits can be copied at one time.

In the following example, XFRB(––) is used to transfer 5 bits from IR 020 and

IR 021 to LR 00 and LR 01. The starting bit in IR 020 is D (13), and the start-

ing bit in LR 00 is E (14), so IR 02013 to IR 02101 are copied to LR 0014 to

0 1 0 1 0 1 0 0 0 0 0

1 1 1 0 0 0 0

The specified source bits are not all in the same data area.

The specified destination bits are not all in the same data area.

Indirectly addressed EM/DM word is non-existent.

(Content of *EM/*DM word is not BCD, or the EM/DM area boundary

has been exceeded.)

Ladder Symbols

When comparing a value to the PV of a timer or counter, the value must be in

First bit of S (0 to F)

First bit of D (0 to F)

Number of bits (00 to FF)

Address Instruction

IR, SR, AR, DM, EM, HR, TIM/CNT, LR, #

Section 5-19

1 0 1 0 0 0 0 0

Operand Data Areas

Cp1: First compare word

Cp2: Second compare word

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