Protocol 2000; Syntax - Kramer VM-114H4C User Manual

10

Protocol 2000

Protocol 2000 is an RS-232/RS-485 communication protocol that 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: Compatibility with Kramer's Protocol 2000 does not mean that a machine
uses all of the protocol commands. Each machine uses a sub-set of Protocol
2000, according to its needs.
10.1

Syntax

MSB
1st Byte
0
7
2nd Byte
1
7
3rd Byte
1
7
4th Byte
1
7
1st Byte:
The 6-bit INSTRUCTION defines the function performed by the switcher(s). If a function is performed using the
machine's keyboard, these bits are set with the INSTRUCTION NO. performed. The instruction codes are defined
according to the table below (INSTRUCTION NO. is the value set in N5...N0).
2nd Byte:
When switching (i.e. instruction codes 1 and 2), the 7-bit INPUT is set as the input number to be switched. If switching is
done using the machine's front panel, these bits are set with the INPUT NUMBER switched. For other operations, these
bits are defined according to the table.
3rd Byte:
When switching (i.e. instruction codes 1 and 2), the 7-bit OUTPUT is set as the output number to be switched. If
switching is done using the machine's front panel, these bits are set with the OUTPUT NUMBER switched. For other
operations, these bits are defined according to the table.
4th Byte:
This byte is used to address machines in a system by their machine numbers. When several machines are controlled
from a single serial port, they are usually configured together and each machine has an individual machine number. If
the OVR bit is set, then all machine numbers accept (implement) the command and the addressed machine replies.
When a single machine is controlled over the serial port, always set M4...M0 to 1, and make sure that the machine itself
is configured as MACHINE NUMBER = 1.
20
DESTINATION
D N5
6 5
I6 I5
6 5
O6 O5
6 5
OVR X
6 5
Bit 7 – Defined as 0
D – DESTINATION:
0 – Sends information to the switchers (from the PC)
1 – Sends information to the PC (from the switcher)
N5...N0 – INSTRUCTION
Bit 7 – Defined as 1
I6...I0 – INPUT
Bit 7 – Defined as 1
O6...O0 – OUTPUT
Bit 7 – Defined as 1
Bit 5 – Don't care
OVR – Machine number override
M4...M0 – MACHINE NUMBER
INSTRUCTION
N4 N3
4 3
INPUT
I4 I3
4 3
OUTPUT
O4 O3
4 3
MACHINE NUMBER
M4 M3
4 3
N2 N1
2 1
I2 I1
2 1
O2 O1
2 1
M2 M1
2 1
VM-114H4C - Protocol 2000
LSB
N0
0
I0
0
O0
0
M0
0