KRAMER: SIMPLE CREATIVE TECHNOLOGY
Kramer VP-727A Protocol (Ver. 3.21)
22
9 Kramer VP-727A Protocol (Ver. 3.21)
A protocol for the
VP-727A
is described below.
For RS-232: A null-modem connection between the PC and the
VP-727A
is
required, and data is at 9600 baud (for standalone
1
), no parity, 8 data bits, and 1
stop bit.
For RS-485: A differential (2 wire) connection between the
VP-727
(
xl
) and the
VP-727A
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 Protocol
INSTRUCTION
1
st
Byte
2
nd
Byte
3
rd
Byte
4
th
Byte
COMMENT
FACTORY RESET
00
81
81
81
RESET
00
80
80
81
See NOTE 1
INPUT 1 PROGRAM OUT
02
81
81
81
INPUT 2 PROGRAM OUT
02
82
81
81
INPUT 3 PROGRAM OUT
02
83
81
81
Select
INPUT 4 PROGRAM OUT
02
84
81
81
Input
INPUT 5 PROGRAM OUT
02
85
81
81
for
INPUT 6 PROGRAM OUT
02
86
81
81
Program
INPUT 7 PROGRAM OUT
02
87
81
81
INPUT 8 PROGRAM OUT
02
88
81
81
See NOTE 1
READ PROGRAM INPUT #
06
81
80
81
See NOTE 3
INPUT 1 PREVIEW OUT
02
81
82
81
INPUT 2 PREVIEW OUT
02
82
82
81
INPUT 3 PREVIEW OUT
02
83
82
81
Select
INPUT 4 PREVIEW OUT
02
84
82
81
Input
INPUT 5 PREVIEW OUT
02
85
82
81
For
INPUT 6 PREVIEW OUT
02
86
82
81
Preview
INPUT 7 PREVIEW OUT
02
87
82
81
INPUT 8 PREVIEW OUT
02
88
82
81
See NOTE 1
READ PREVIEW INPUT #
06
82
80
81
See NOTE 3
SET TAKE TRANSITION
SPEED
07
81
80
81
1 38,400 buad when operating with the VP-727xl and 115,200 baud when operating with the VP-727
