VS-41HDCP - Kramer Protocol
25
1
st
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 – “ NSTRUCTION”
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 NSTRUCTION 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).
2
nd
BYTE:
Bit 7 – Defined as 1.
I6
I0 – “ NPUT”.
When switching (ie. instruction codes 1 and 2), the NPUT (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.
3
rd
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.
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.
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.
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.
i
All the values in the table are decimal, unless otherwise stated
Instruction Codes for Protocol 2000
Instruction
Definition for Specific Instruction
Notes
#
Description
Input
Output
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
30
LOCK FRONT PANEL
0 - Panel unlocked
1 - Panel locked
0
2
56
CHANGE TO ASCII
0
3 - Protocol-3000
19
NOTES on the above table:
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 DEST NATION bit
is set high).
NOTE 19 - After this instruction is sent, the unit will respond to the ASCII command set defined by the OUTPUT byte.
The ASCII command to operate with the HEX command set must be sent in order to return to working with HEX codes.