Hitachi Kokusai Electric KP-F500PCL Operation Manual page 22

4. Comms command data format
(1) Send data and read command (master to slave)
(a) Command data are converted into ASCII code and transmitted.
(b) Comms byte quantity is 18.
(c) Comms data format (transmission sequence).
S T X
1 byte
・STX (start code)
・Text data
・ETX (end code)
・SUM
(d) Text data format details (transmission sequence).
Status
2 byte
・Status
・ID No.
・Area address
・Relative No.
・Data (note)
Text data
14 byte
18 byte
: Code indicating start of text.
1 byte (02H)
: Transmit / receive data.
14 byte (ASCII code)
: Code indicating end of text.
1 byte (03H)
: XOR result (FFH), of adding STX, Text data, and ETX.
2 byte (ASCII code)
ID No. Area address
2 byte 2 byte
14 byte
: Transmission data status.
2 byte (ASCII code)
Used for EEPROM write (0: write absent, 1: write present).
: Camera peculiar ID.
KP-F500PCL/SCL and KP-FR500PCL/SCL have (FFH).
2 byte (ASCII code)
: Classification of Send data (01H) and Read command (81H).
2 byte (ASCII code)
: Sets number (0 to 255) for each adjustment item.
2 byte (ASCII code)
: Sets data to be transmitted.
2 byte x 3 (ASCII code)
E T X S U M
1 byte 2 byte
Relative No. Data
2 byte 2 byte x 3
12