Kramer Electronics VM-24H - Manual (Page 21)

18 VM-24H - Communication Protocol
NOTE 16 – The reply to the REQUEST WHETHER PANEL IS LOCKED is the same as in NOTE 4 above, except that
OUTPUT is assigned with the value 0 if the panel is unlocked, or 1 if it is locked.
NOTE 20
– When data (i.e. the INPUT and/or OUTPUT bytes) of more than 7 bits is required, instruction 63 is sent
before sending the instruction needing the additional bits. The data in this instruction then becomes the most significant
bits of that next instruction.
For example, to set the audio gain (instruction 22) of output 3 to 681dec (2A9hex), send HEX code:
3F
80 85 81
followed by HEX code:
16
83 A9 81.
To set the audio gain of output 6 to 10013dec (271Dhex), send HEX code:
3F
80 CE 81
followed by HEX code:
16
86 9D 81.