11 kramer protocol 2000, Kramer protocol 2000, N 11 – Kramer Electronics VS-5x5 User Manual

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VS-5x5 - Kramer Protocol 2000

11 Kramer

Protocol

2000

The VS-5x5 is compatible with Kramer’s Protocol 2000 (version 0.5) (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.

MSB

LSB

Destination

Instruction

0 D N5

7 6

5 4

1st byte

Input

1 I6

I5 I4

7 6

5 4

2nd byte

Output

3rd byte

Machine Number

OVR

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).

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.