Kramer Protocol 2000
17
4
th
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.
Table 7: 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
0
0
1
1
SWITCH INPUT
Set equal to video input
which is to be switched
(0 = disconnect)
1
2
5
REQUEST STATUS OF A
VIDEO OUTPUT
0
Equal to output number
whose status is reqd
3
7
SET SIGNAL WAIT
DELAY (in priority
switching)
0 – 100 the number of
seconds of delay (the default
signal delay wait is 30
seconds)
64
2, 28
10
REQUEST SIGNAL WAIT
DELAY (in priority
switching)
0
0
4
15
REQUEST WHETHER
VALID INPUT IS
DETECTED
Input # or 127 for request if
any input detected
1
8
16
ERROR / BUSY
For invalid / valid input (i.e.
OUTPUT byte = 4 or
OUTPUT byte = 5), this byte
is set as the input # or 127 if
all inputs become invalid
0 - error
1 - invalid instruction
2 - out of range
3 - machine busy
4 - invalid input
5 - valid input
6 - RX buffer overflow
9, 25
30
LOCK FRONT PANEL
Panel unlocked
Panel locked
0
2
31
REQUEST WHETHER
PANEL IS LOCKED
0
0
7
61
IDENTIFY MACHINE
video machine name
video software version
Request first 4 digits
Request first suffix
5
62
DEFINE MACHINE
number of inputs
number of outputs
for video
for audio
6
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 - 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:
