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K R A M E R
E le c tro n ic s
2.4 COMMUNICATION PROTOCOL 2000 TM
INCLUDING OPTIONS (02/09/2005 VER-5.06)
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
st
1
byte
DEST
0
D
7
6
nd
2
byte
INPUT / DATA_1
1
D6
7
6
rd
3
byte
OUTPUT / ADRESS / DATA_2
1
A6
7
6
th
4
byte
1
Bit 7
output
7
6
st
1
BYTE:
Bit 7 – Defined as 0.
D – "DEST": 0 - for sending to the switcher (from the PC or keyboard).
N5...N0 – "INSTRUCTION"
The function that is to be performed by the switcher(s) is defined by the INSTRUCTION (6
bits). The instruction codes are defined according to the table below (INSTRUCTION NO. is
the value to be set for N5...N0).
MATRIX ROUTING SWITCHER
INSTRUCTION
N5
N4
5
4
D5
D4
5
4
A5
A4
5
4
LAYER NUMBER
L4 /
Bit 7
input
Bit 8 output
5
4
1 - for sending to the PC or keyboard (from the switcher).
N3
N2
3
2
D3
D2
3
2
A3
A2
3
2
L3 /
L2
Bit 8 input
3
2
8
LSB
N1
N0
1
0
D1
D0
1
0
A1
A0
1
0
L1
L0
1
0
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