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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
(Example 1)
Computer
Inverter
ASCII code
(Example 2)
Inverter
Computer
ASCII code
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 158.)
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 206.
E
N
Q
0
1 E 1
H05
H30 H31
H45 H31
H31
H
H
H
H
30
+
31
+
45
+
31
+
H
1F4
=
Sum
S
Read data
T
X
0
1
1
7
H02
H30 H31
H31 H37
H37
H
H
H
H
30
+
31
+
31
+
37
H
130
=
Sum
152
Sum
Data
check
code
1
0
7 A D
F 4
H30 H37 H41 H44 H46 H34
H
H
H
H
H
31
+
30
+
37
+
41
+
44
E
Sum
check
T
code
X
3
0
7
0
H30 H03 H33 H30
H
H
+
37
+
30
Binary code
Binary code
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