Kramer protocol – Kramer Electronics VP-81KSi User Manual

Page 48

KRAMER: SIMPLE CREATIVE TECHNOLOGY

Kramer Protocol

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.

NOTE 9 - An error code is returned to the PC if an invalid instruction code was sent to the switcher, or if a parameter associated with the

instruction is out of range (e.g. trying to save to a setup greater than the highest one, or trying to switch an input or output greater than

the highest one defined). This code is also returned to the PC if an RS-232 instruction is sent while the machine is being programmed via

the front panel. Reception of this code by the switcher is not valid.
NOTE 10 – This code is reserved for internal use.

NOTE 13 - This is a request to identify the switcher/s in the system. If the OUTPUT is set as 0, and the INPUT is set as 1, 2, 5 or 7, the

machine will send its name. The reply is the decimal value of the INPUT and OUTPUT. For example, for a 2216, the reply to the request

to send the audio machine name would be (HEX codes):

81 (i.e. 128dec+ 22dec for 2nd byte, and 128dec+ 16dec for 3rd byte).

If the request for identification is sent with the INPUT set as 3 or 4, the appropriate machine will send its software version number.

Again, the reply would be the decimal value of the INPUT and OUTPUT - the INPUT representing the number in front of the decimal

point, and the OUTPUT representing the number after it. For example, for version 3.5, the reply to the request to send the version

number would be (HEX codes):

81 (i.e. 128dec+ 3dec for 2nd byte, 128dec+ 5dec for 3rd byte).