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Communication parameters
2
FUNCTIONS
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
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
code list on page 180.
E
N
Q
1
0 1E1 07ADF4
H05 H30 H31 H31H45H31 H30H37 H41 H44 H46 H34
S
T
X
0 117 0
30
H02 H30 H31 H37H31 H37 H30 H03
H33 H30
E
T
X
7
Sum
check
code
Sum
check
code
Binary code
(Example 1)
Computer Inverter
ASCII code
(Example 2)
Inverter Computer
ASCII code
Binary code
H
1F4
=
H
30
H
31
H
45
H
31
H
31
H
30
H
37
H
41
H
44
++++++++
H
130
=
H
30
H
31
H
31
H
37
H
37
H
30+++++
Sum
Sum
Station
number
Read data
Station
number
Data
Waiting
time
Instruction
code