Mitsubishi Electronics FR-S500 instruction manual number, Waiting

Communication parameters

8) Sum check code

The sum check code is 2-digit ASCII (hexadecimal) representing the lower 1 byte (8 bits) of the sum (binary) derived from the checked ASCII data

E

Station

number

Instruction

code

Waiting

Sum

(Example 1)

time

N

Data

check

Computer

Inverter

Q

code

ASCII code

0

1

E 1

1

0 7

A

D

F 4

Binary code

H05

H30 H31

H45 H31

H31

H30 H37 H41 H44

H46 H34

H

H

H

H

H

H

H

H

H

30+31+45+31+31+30+37+41+44

H

=1F4

Sum

Inverter

Computer

S

Station

number

Read data

E

Sum

X

X

code

(Example 2)

T

T

check

ASCII code

0

1

1

7

7 0

3

0

Binary code

H02

H30 H31

H31 H37 H37 H30

H03

H33 H30

H H H H H H 30+31+31+37+37+30

H

=130

Sum

9) Error code

If any error is found in the data received by the inverter, its definition is sent back to the computer together with the NAK code. (Refer to page 145.)

REMARKS

1.When the data from the computer has an error, the inverter will not accept that data.

2.All data communication, e.g. run command or monitoring, are started when the computer gives a communication request. The inverter does not return any data without the computer's request. For monitoring, therefore, design the program to cause the computer to provide a data read request as required.

3.When the parameter setting is read or written, the data of the link parameter expansion setting changes depending on the parameter. For the data, refer to the parameter instruction 2 code list on page 180.

FUNCTIONS

139