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9
Kramer VP-727A-BA Protocol (Ver. 3.21)
A protocol for the VP-727A-BA is described below.
For RS-232: A null-modem connection between the PC and the VP-727A-BA
is required, and data is at 9600 baud (for standalone
1 stop bit.
For RS-485: A differential (2 wire) connection between the VP-727(xl) and the
VP-727A-BA is required (A, B); GND may be connected to the shield if
required.
All values shown are hexadecimal.
Table 4: Instruction Codes for the VP-727A-BA Protocol
INSTRUCTION
FACTORY RESET
RESET
INPUT 1 → PROGRAM OUT
INPUT 2 → PROGRAM OUT
INPUT 3 → PROGRAM OUT
INPUT 4 → PROGRAM OUT
INPUT 5 → PROGRAM OUT
INPUT 6 → PROGRAM OUT
INPUT 7 → PROGRAM OUT
INPUT 8 → PROGRAM OUT
READ PROGRAM INPUT #
INPUT 1 → PREVIEW OUT
INPUT 2 → PREVIEW OUT
INPUT 3 → PREVIEW OUT
INPUT 4 → PREVIEW OUT
INPUT 5 → PREVIEW OUT
INPUT 6 → PREVIEW OUT
INPUT 7 → PREVIEW OUT
INPUT 8 → PREVIEW OUT
READ PREVIEW INPUT #
1 38,400 baud when operating with the VP-727xl and 115,200 baud when operating with the VP-727
Kramer VP-727A-BA Protocol (Ver. 3.21)
st
nd
1
Byte
2
Byte
00
81
00
80
02
81
02
82
02
83
02
84
02
85
02
86
02
87
02
88
06
81
02
81
02
82
02
83
02
84
02
85
02
86
02
87
02
88
06
82
1
), no parity, 8 data bits, and
rd
th
3
Byte
4
Byte
81
81
80
81
81
81
81
81
81
81
81
81
81
81
81
81
81
81
81
81
80
81
82
81
82
81
82
81
82
81
82
81
82
81
82
81
82
81
80
81
COMMENT
See NOTE 1
Select
Input
for
Program
See NOTE 1
See NOTE 3
Select
Input
For
Preview
See NOTE 1
See NOTE 3
23
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