Kramer Electronics VS-66hdcp user manual Kramer Protocol, Protocol Definitions

3rd BYTE:

2nd BYTE:

Kramer Protocol 2000

11 Kramer Protocol 2000

The VS-66HDCPis compatible1 with Kramer’s Protocol 20002 (version 0.50) (below). This RS-232/RS-485 communication protocol uses four bytes of information as defined below. The default data rate is 9600 baud, with no parity, 8 data bits and 1 stop bit.

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 – “DESTINATION”:			0 - for sending information to the switchers (from the PC);

1 - for sending to the PC (from the switcher). N5…N0 – “INSTRUCTION”

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).

Bit 7 – Defined as 1.

I6…I0 – “INPUT”.

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.

Bit 7 – Defined as 1. O6…O0 – “OUTPUT”.

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.

4th BYTE: Bit 7 – Defined as 1.

Bit 5 – Don’t care.

OVR – Machine number override. M4…M0 – MACHINE NUMBER.

Used to address machines in a system via their machine numbers. When several machines are controlled from a single serial port, they are usually configured together with each machine having an individual machine number. If the OVR bit is set, then all machine numbers will accept (implement) the command, and the addressed machine will reply.

1 You can download our user-friendly “Software for Calculating Hex Codes for Protocol 2000” from the technical support

section on our Web site at: http://www.kramerelectronics.com

2 The instruction codes in Table 7 are a sub-set of the Protocol 2000. You can find the full protocol on our Web site at

http://www.kramerelectronics.com

18 KRAMER: SIMPLE CREATIVE TECHNOLOGY