Black Box ACX4000, Руководство пользователя

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APPENDIX D: PROTOCOL FOR COMMAND MODE
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Appendix D: Protocol for command mode
For the control of the ACX4000 Switch device following parameters are used:
For communication please set up the format of the serial data communication to:
115,2K,8,1,NO
(115,2 KBAUD, 8 Data bit, 1 Stop bit, NO parity)
Structure of telegram
<STX>, <command byte (CMD)>, [data bytes (D0..DN)], <ETX>
[ ] = optional elements
Parameter description
Command byte in the range of 0x40...0x6F (see the list of allowed commands
below)
Data Bytes a) Binary data: in order to prevent that, during the
transmission of binary data, control statements or control
commands are transferred, the data are divided into low-nibble
and high-nibble. The data are distributed to the low-nibbles of
two bytes and provided with an offset by 0x60 e.g. 0x1F =>
0x61 + 0x6F
b) 7bit-data (0x0...0x7F) are provided with an offset by 0x80,
e.g. 0000011 => 0x83
c) ASCII-data => 0x20… 0x7E are unencrypted transmitted
(Special-)Character ACK 0x06
NAK 0x15
STX 0x02
ETX 0x03
CR 0x0D
ESC 0x1B