176461 User Manual.book

MicroLogix 1500 Programmable Controllers User Manual

GRT - Greater Than

LES - Less Than

Instruction Type: input

Table 14-4: Execution Time for the GRT and LES Instructions

Instruction

GRT

LES

Data Size

word long word word long word

True

1.30

µ s

2.59

µ s

1.22

µ s

2.59

µ s

When Rung Is:

False

0.94

µ s

2.27

µ s

1.02

µ s

2.27

µ s

The GRT instruction is used to test whether one value is greater than a second value.

The LES instruction is used to test whether one value is less than a second value.

A

Table 14-5: GRT and LES Instruction Operation

Instruction

GRT

LES

Relationship of Source Values

A > B

A

≤

B

A

≥

<

B

B

Resulting Rung State

true false false true

14-4