Kramer protocol – Kramer Electronics VP-31KSi User Manual

Page 45

Kramer Protocol

INSTRUCTION

DEFINITION FOR SPECIFIC INSTRUCTION

NOTE

DESCRIPTION

INPUT

OUTPUT

IDENTIFY MACHINE

1 - video machine name
2 - audio machine name
3 - video software

version
4 - audio software

version

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

DEFINE MACHINE

1 - number of inputs
2 - number of outputs
3 - number of setups

1 - for video
2 - for audio

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

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

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

would be HEX codes
4B

NOTE 6 – If INPUT is set to 127 for these instructions, then, if the function is defined on this machine, it replies with OUTPUT=1. If

the function is not defined, then the machine replies with OUTPUT=0, or with an error (invalid instruction code).

If the INPUT is set to 126 for these instructions, then, if possible, the machine will return the current setting of this function, even for the

case that the function is not defined. For example, for a video switcher which always switches during the VIS of input #1, (and its VIS

setting cannot be programmed otherwise), the reply to the HEX code
0A

81 (ie. request VIS setting, with INPUT set as 126dec)

would be HEX codes
4A

81 (ie. VIS setting = 1, which is defined as VIS from input #1).

NOTE 8 - The reply is as in TYPE 3 above, except that here the OUTPUT is assigned with the value 0 if the setup is not defined / no

valid input is detected; or 1 if it is defined / valid input is detected.