Iec Compare Instructions; Compare Equal; Compare Not Equal - Siemens SIMATIC S7-200 System Manual

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IEC 1131-3 Instructions

IEC Compare Instructions

There are no non-standard IEC Compare instructions.

Inputs/Outputs

IB, QB, MB, SB, SMB, VB, LB, IW, QW, MW, SW, SMW, VW, LW,

T, C, AIW, ID, QD, MD, SD, SMD, VD, LD, HC, AC, Constant,

*VD, *AC, *LD

OUT (LAD only)

OUT (FBD only)

I, Q, M, SM, T, C, V, S, L, Power Flow

Inputs/Outputs

IB, QB, MB, SB, SMB, VB, LB, IW, QW, MW, SW, SMW, VW, LW,

T, C, AIW, ID, QD, MD, SD, SMD, VD, LD, HC, AC, Constant,

*VD, *AC, *LD

OUT (LAD only)

OUT(FBD only)

I, Q, M, SM, T, C, V, S, L, Power Flow

The Compare Equal function compares IN1 and IN2

with the Boolean result placed in OUT. The input and

output data types can vary but must be of the same type.

Byte comparisons are unsigned. Integer, double integer,

and real comparisons are signed. Time operations are

signed integers.

The Compare Not Equal function compares IN1 and IN2

with the Boolean result placed in OUT. The input and

output data types can vary, but must be of the same

Byte comparisons are unsigned. Integer, double integer,

and real comparisons are signed. Time operations are

signed integers.

BYTE, INT, DINT

BYTE, INT, DINT,

S7-200 Programmable Controller System Manual

A5E00066097-02

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