Kramer Electronics VP-2x2 - Manual (Page 15)

Table of Hex Codes for Serial Communication
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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.
NOTE 12 - Under normal conditions, the machine's present status is saved each time a change is made. The "power-down"
save (auto-save) may be disabled using this code. Note that whenever the machine is turned on, the auto-save function is set.
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 or
2, the machine will send its name. The reply is the decimal value of the INPUT and OUTPUT. For example, for a VP-2x2, the
reply to the request to send the audio machine name would be (HEX codes):
7D 82 82 81 (i.e. 128dec+ 21dec for 2nd byte, and 128dec+ 2dec 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):
7D 83 85 81 (i.e. 128dec+ 3dec for 2nd byte, 128dec+ 5dec for 3rd byte).
NOTE 14 - The number of inputs and outputs refers to the specific machine which is being addressed, not to the system.
9 Table of Hex Codes for Serial Communication
Table 5 lists the Hex values for switching on the VP-2x2.
Table 5: Hex Codes
OUT 1 OUT 2
OUT 1
2
OUT 2
2 2
2