Kramer Electronics VP-411DS user manual Kramer Protocol, Protocol Definitions

Kramer Protocol 2000

9 Kramer Protocol 20001

The VP-411DSis compatible with Kramer’s Protocol 2000 (version 0.50) (below). This RS-232/RS-485 communication protocol uses four bytes of information as defined below. For RS-232, a null-modem connection between the machine and controller is used. The default data rate is 9600 baud, with no parity, 8 data bits and 1 stop bit.

Note: compatible with Kramer’s Protocol 2000 does not imply that a machine includes all of the commands below. Each machine uses a sub-set of Protocol 2000, according to its needs.

Table 6: Protocol Definitions

	MSB									LSB
			DESTI-		INSTRUCTION
			NATION
0			D		N5	N4	N3	N2	N1	N0
7			6		5	4	3	2	1	0
	1st byte
			INPUT
	1		I6		I5	I4	I3	I2	I1	I0
7			6		5	4	3	2	1	0
	2nd byte
			OUTPUT
1			O6		O5	O4	O3	O2	O1	O0
7			6		5	4	3	2	1	0
	3rd byte
						MACHINE NUMBER
1			OVR		X	M4	M3	M2	M1	M0
7			6		5	4	3	2	1	0
	4th byte
	1st BYTE:	Bit 7 ± Defined as 0.
	D ± ª DESTINATIONº :			0 - for sending information to the switchers (from the PC);

1 - for sending to the PC (from the switcher). N5…N0 ± ª INSTRUCTIONº

The function that is to be performed by the switcher(s) is defined by the INSTRUCTION (6 bits). Similarly, if a function is performed via the machine’s keyboard, then these bits are set with the INSTRUCTION NO., which was performed. The instruction codes are defined according to the table below (INSTRUCTION NO. is the value to be set for N5…N0).

2nd BYTE:Bit 7 ± Defined as 1. I6…I0 ± ª INPUTº .

When switching (ie. instruction codes 1 and 2), the INPUT (7 bits) is set as the input number which is to be switched. Similarly, if switching is done via the machine’s front-panel, then these bits are set with the INPUT NUMBER which was switched. For other operations, these bits are defined according to the table.

3rd BYTE:	Bit 7 ± Defined as 1.
	O6…O0 ± ª OUTPUTº .

When switching (ie. instruction codes 1 and 2), the OUTPUT (7 bits) is set as the output number which is to be switched. Similarly, if switching is done via the machine’s front-panel, then these bits are set with the OUTPUT NUMBER which was switched. For other operations, these bits are defined according to the table.

1 You can download our user-friendly ª Software for Calculating Hex Codes for Protocol 2000º from the technical support section on our Web site at: http://www.kramerelectronics.com

16 KRAMER: SIMPLE CREATIVE TECHNOLOGY