User manual
Kramer Protocol 2000 
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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. 
Table 6: Instruction Codes for Protocol 2000 
Note: All values in the table are decimal, unless otherwise stated. 
INSTRUCTION 
DEFINITION FOR SPECIFIC INSTRUCTION 
NOTE 
# 
DESCRIPTION 
INPUT 
OUTPUT 
0 
RESET VIDEO 
0 
0 
1 
1  SWITCH VIDEO  Set equal to video input 
which is to be switched 
(0 = disconnect) 
Set equal to video output which is 
to be switched  
(0 = to all the outputs) 
2, 15 
3  STORE VIDEO STATUS  Set as SETUP #  0 - to store  
1 - to delete 
2, 3, 15 
4 
RECALL VIDEO STATUS 
Set as SETUP # 
0 
2, 3, 15 
5  REQUEST STATUS OF A 
VIDEO OUTPUT 
Set as SETUP #  Equal to output number whose 
status is reqd 
4, 3 
15  REQUEST WHETHER SETUP 
IS DEFINED / VALID INPUT IS 
DETECTED 
SETUP #  
or  
Input # 
0 - for checking if setup is defined 
1 - for checking if input is valid 
8 
30 
LOCK FRONT PANEL 
0 - Panel unlocked 
1 - Panel locked 
0 
2 
31  REQUEST WHETHER PANEL 
IS LOCKED 
0  0  16 
61  IDENTIFY MACHINE   1 - video machine name 
2 - audio machine name 
3 - video software version 
4 - audio software version 
5 - RS422 controller name 
6 - RS422 controller 
version 
7 - remote control name 
8 - remote software 
version 
9 - Protocol 2000 revision 
0 - Request first 4 digits 
1 - Request first suffix 
2 - Request second suffix 
3 - Request third suffix 
10 - Request first prefix 
11 - Request second prefix 
12 - Request third prefix 
13 
62 
DEFINE MACHINE  
1 - number of inputs 
2 - number of outputs 
3 - number of setups 
1 - for video 
2 - for audio 
3 - for SDI 
4 - for remote panel 
5 - for RS-422 controller 
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NOTES on the above table: 
NOTE 1 - When the master switcher is reset, (e.g. when it is turned on), the reset code is sent to the PC. If this code is sent to 
the switchers, it will reset according to the present power-down settings. 
NOTE 2 - These are bi-directional definitions. That is, if the switcher receives the code, it will perform the instruction; and if 
the instruction is performed (due to a keystroke operation on the front panel), then these codes are sent. For example, if the 
HEX code 
01  85  88  83 
was sent from the PC, then the switcher (machine 3) will switch input 5 to output 8. If the user switched input 1 to output 7 
via the front panel keypad, then the switcher will send HEX codes: 
41  81  87  83 
to the PC. 
When the PC sends one of the commands in this group to the switcher, then, if the instruction is valid, the switcher replies by 
sending to the PC the same four bytes that it was sent (except for the first byte, where the DESTINATION bit is set high).  
NOTE 3 - SETUP # 0 is the present setting. SETUP # 1 and higher are the settings saved in the switcher's memory, (i.e. those 
used for Store and Recall). 
NOTE 4  -  The reply to a "REQUEST" instruction is as follows: the same instruction and INPUT codes as were sent are 
returned, and the OUTPUT is assigned the value of the requested parameter. The replies to instructions 10 and 11 are as per 
the definitions in instructions 7 and 8 respectively. For example, if the present status of machine number 5 is breakaway 
setting, then the reply to the HEX code 
0B  80  80  85 
would be HEX codes 
4B  80  81  85 










