Mitsubishi Electronics FX3G User Manual

FX

3S

/FX

3G

/FX

3GC

/FX

3U

/FX

3UC

 Series

Programming Manual - Basic & Applied Instruction Edition

16 External FX Device – FNC 80 to FNC 89

This instruction calculates the horizontal parity value and sum check value in the error check methods used in
communication. There is another check method, CRC (cyclic redundancy check) also. For obtaining CRC value, use
CRC instruction.

→ For CRC instruction, refer to Section 24.4.

→ For complement [NEG (FNC 29) instruction], refer to Section 10.10.

S

1: This function is supported only in FX

3G

/FX

3GC

/FX

3U

/FX

3UC

 PLCs.

S

2: This function is supported only in FX

3U

/FX

3UC

 PLCs.

The addition data and horizontal parity value of data stored in 

 to 

+n-1 are calculated. The addition data is

stored to 

, and the horizontal parity value is stored to 

+1.

The 16-bit mode and 8-bit mode are available in this instruction. For the operation in each mode, refer to the
proceeding pages.

Head device number of applicable device

16-bit binary or

character string

Head device number storing the calculated data

16-bit binary or

character string

n

Number of data [setting range: 1 to 256]

16-bit binary

System User

Digit Specification

System User

Special 

Unit

Index

Con-
stant

Real 

Number

Charac-

ter String

Pointer

X Y M T C S D .b KnX KnY KnM KnS T C D

R

U \G

V Z Modify K H

E

" "

P

S1

S2

S1

n

S1

P

FNC 84

CCD

−
−

Mnemonic

Operation Condition

16-bit Instruction

7 steps CCD

CCDP

Mnemonic

Operation Condition

Continuous

Operation
Pulse (Single)

Operation

32-bit Instruction

S

1

 ‚

  S

  D

S

1

 ‚

  S

S

2

 ‚

  D

   

S

   

S

   

D

   

D

FNC 84

CCD

n

S ‚

Command

input

D ‚