9-17
(2) Polling
Host Inverter (polling)
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 the station address of the
destination inverter with 01 to 31 or 99.
(Designation of each digit in ASCII)
3
Enquiry character (ENQ)
← Fixed to 05H
4
Command type character (ASCII)
← "g", "h", "i", "j" or "k" is designated.
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.
Inverter Host frame (polling)
7(6)
0
0
Start-of-heading character (SOH)
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)
← "g", "h", "i", "j" or "k" sent from the host is
returned.
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 command 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.
9-4-7 Details of Frame
(1) Start-of-heading character (ASCII; SOH)
01H in binary.
(2) Tens digit and units digit of station address
Two ASCII characters expressing a decimal station address between 1 and 31.
Example: Station address 1: Tens digit of station address: ASCII "0", units digit of station
address:
ASCII "1"
Station address 31: Tens digit of station address: ASCII "3", units digit of station address:
ASCII "1"
(3) Enquiry character (ASCII; ENQ)
05H in binary.
(4) Response character (ASCII; ACK/NAK)
The inverter sets ACK (06H) to recognize a request.
NAK (15H) is set when the request from the host includes a logical error.
To Next Page
Loading...
Need help?
General
