9-16
9-4-6 Short Frame
Short frames are prepared for special functions to reduce the data transmission time.
(1) Selecting
Host Inverter (selecting)
7(6) 0
0
Start-of-heading character (SOH)
← Fixed to 01H
1
Tens digit of station address (ASCII)
2
Units digit of station address (ASCII)
Designate a station address of the
destination inverter with 01 to 31 or 99.
(Designation of each character in ASCII)
3
Enquiry character (ENQ)
← Fixed to 05H
4
Command type character (ASCII)
← "a", "e", "f" or "m" is designated.
5
First character of data (ASCII)
6
Second character of data (ASCII)
7
Third character of data (ASCII)
8
Fourth character of data (ASCII)
The data corresponding to the function is
converted into a four-digit hexadecimal and
each digit is designated in ASCII.
9
End-of-text character (ETX)
← Fixed to 03H
10
Upper digit of checksum (ASCII)
11
Lower digit of checksum (ASCII)
From tens digit of the station address to ETX
are added in a binary and the lower two digits
of it in hexadecimal notation are stored in
ASCII as a checksum.
Inverter Host frame (selecting)
7(6) 0
0
Start-of-heading character (SOH)
← Fixed to 01H
1
Tens digit of station address (ASCII)
2
Units digit of station address (ASCII)
Station address of responding inverter (01 to
31) (designation of each digit in ASCII)
3
Response character (ACK/NAK)
← 06H: Normal response (ACK), 15H: Faulty
response (NAK)
4
Command type character (ASCII)
← "a", "e", "f" or "m" sent from the host is
returned.
5
End-of-text character (ETX)
← Fixed to 03H
6
Upper digit of checksum (ASCII)
7
Lower digit of checksum (ASCII)
From tens digit of the station address to ETX
are added in a binary and the lower two digits
of it in hexadecimal notation are stored in
ASCII as a checksum.
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