Address Byte; Command Byte; Response Byte(S); Reject Byte(S) - CPI Satcom Division VZU-6997 Series Installation, Operation And Maintenance Manual

Commands:
Header byte = STX (ASCII 02)
Ending byte = ETX (ASCII 03)
Responses:
Header byte = ACK (ASCII 06) is used if the CHPA accepted the command.
Header byte = NAK (ASCII 21) is used if the CHPA rejected the command. A reject code (or
codes) indicates why the command was rejected.
Ending byte = ETX (ASCII 03)
ASCII option (ASCII on front panel)
All commands and responses:
Header byte = { (ASCII 123)
Ending byte = } (ASCII 125)
3.9.2

Address Byte

(The address byte is under CIF CONFIGURATION as PORT ADDRESS.)
The address byte provides the computer port with an address. It may be set from 48 to 111
using the keypad or the arrow keys.
3.9.3

Command Byte

The range of command bytes is from 32 to 111.
3.9.4

Response Byte(s)

The response byte(s) range from 32 to 95.
3.9.5

Reject Byte(s)

If a command is not accepted, a reject code (or codes) is returned. See Table 3-6.

Table 3-6. Reject Bytes

ASCII Character
a
b
c
D .01023245 R .L
OC EV
Decimal Meaning
97 Command byte not recognized.
98 Ilegal parameter out of range.
99 CIF is not enabled and the command can't be executed.
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CHPA SERIES
3-11