Chapter 5 Instruction Specifications

Relational box Classification

Item number

32

33

34

35

Ladder symbol

s1

<

s2

s1

<

s2

s1

<

s2

s1

S<

s2

s1

S<

s2

s1

S<

s2

s1

<=

s2

s1

<=

s2

s1

<=

s2

s1

S<=

s2

s1

S<=

s2

s1

S<=

s2

Instruction symbol

LD (s1< s2)

AND (s1< s2)

OR (s1< s2)

LD (s1 S< s2)

AND (s1 S< s2)

OR (s1 S< s2)

LD (s1 <= s2)

AND (s1 <= s2)

OR (s1 <= s2)

LD (s1 S<= s2)

AND (s1 S<= s2)

OR (s1 S<= s2)

Instruction

Process descriptions

I/O types used

name

 

 

< Relational When s1 < s2: Continuity

[Word]

box

When s1 ≥ s2:

WX, WY, WR,

 

Noncontinuity

WM,

 

 

Timer Counter

 

 

[Double word]

 

 

DX, DY, DR,

 

 

DM

 

 

Constant

Signed <

When s1

< s2: Continuity

DX, DY, DR,

Relational

When s1

≥ s2:

DM

box

Noncontinuity

Constant

 

s1 and s2 are compared as

 

signed 32-bit binary.

 

<=

When s1

≤ s2:

[Word]

Relational

Noncontinuity

WX, WY, WR,

box

When s1

> s2: Continuity

WM,

 

 

 

Timer Counter

 

 

 

[Double word]

 

 

 

DX, DY, DR,

 

 

 

DM

 

 

 

Constant

Signed <=

When s1

≤ s2: Continuity

DX, DY, DR,

Relational

When s1

> s2:

DM

box

Noncontinuity

Constant

 

s1 and s2 are compared as

 

signed 32-bit binary.

 

R7F4

R7F3

R7F2

R7F1

R7F0

DER ERR SD

V

C

z

z

z

z

z

z z z z z

z z z z z

z z z z z

Process

time (s)

MICRO-EH

26.8

37.5

37.5

26.8

42

37.5

Steps

Remarks

 

5*1

6*2

7Upper

8case: W

Lower case: DW

5*2

5*1

6*2

7Upper

8case: W

Lower case: DW

5*2

8

*1: In the case of word, it requires five steps for LD (s1†s2) and AND (s1†s2), and six steps for OR (s1†s2).

*2: In the case of double word, for LD (s1†s2) and AND (s1†s2), it requires five steps when the combination of s1 and s2 is I/O and I/O, six steps when the combination is either I/O and constant or constant and I/O, and seven steps when the combination is constant and constant. For OR (s1†s2), one step is added respectively.

5-5

Page 55
Image 55
Hitachi NJI-350B manual Item number Ladder symbol Instruction symbol