11.3Kramer Protocol 2000

This RS-232/RS-485/Ethernet communication protocol (Version 0.5) 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.

 

Table 1: Protocol Definitions

 

 

 

 

 

 

 

 

MSB

 

 

 

 

 

 

 

 

 

 

 

 

LSB

1st byte

Destination

 

 

 

 

 

Instruction

 

 

 

 

0

D

 

 

N5

 

N4

 

N3

 

N2

 

N1

N0

7

6

 

 

5

 

4

 

3

 

2

 

1

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2d byte

 

 

 

 

 

 

 

INPUT

 

 

 

 

1

I6

 

 

I5

 

I4

 

I3

 

I2

 

I1

I0

7

6

 

 

5

 

4

 

3

 

2

 

1

0

 

 

 

 

 

 

 

 

 

 

 

 

3d byte

 

 

 

 

 

 

OUTPUT

 

 

 

 

1

O6

 

 

O5

 

O4

 

O3

 

O2

 

O1

O0

7

6

 

 

5

 

4

 

3

 

2

 

1

0

4th byte

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MACHINE NUMBER

 

 

1

OVR

 

 

X

 

M4

 

M3

 

M2

 

M1

M0

7

6

 

 

5

 

4

 

3

 

2

 

1

0

 

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).

 

2nd BYTE:

 

 

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.

 

 

 

 

 

3rd BYTE:

 

 

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.

For a single machine controlled via the serial port, always set M4…M0 = 1, and make sure that the machine itself is configured as MACHINE NUMBER = 1.

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VP-81K - Kramer Protocol

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Image 39
Kramer Electronics VP-81 K user manual Msb Lsb, Input, Output, Machine Number
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VP-81 K specifications

Kramer Electronics has established itself as a leading provider of innovative audio-visual solutions, and the VP-81 K is a noteworthy addition to their product lineup. This versatile presentation switcher is designed to accommodate a variety of audiovisual applications, making it ideal for classrooms, conference rooms, and professional events.

One of the standout features of the VP-81 K is its ability to handle multiple video formats. It supports both analog and digital inputs, including HDMI, VGA, and Composite video. This flexibility allows users to connect a wide range of devices, from laptops and projectors to higher-end sources and displays. The device seamlessly switches between input sources, ensuring a smooth presentation experience without interruption.

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In terms of control, the VP-81 K is user-friendly. It provides multiple controlling options, including front-panel buttons, remote control, and RS-232 for integration with third-party systems. This flexibility ensures that users can easily manage their presentations, regardless of their technical expertise.

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Overall, the Kramer Electronics VP-81 K is a powerful and adaptable presentation switcher, equipped with essential features and cutting-edge technologies that cater to modern audiovisual needs. Whether in educational settings or corporate environments, its capabilities are sure to elevate any presentation experience.
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