Kramer Electronics VS-626 - Manual (Page 25)

Communication Protocol
KRAMER: SIMPLE CREATIVE TECHNOLOGY
22
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 sent (except for the first byte, where the DESTINATION bit is set "high").
NOTE 3 - 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
0000 1011 0100 1100
1000 0001 Would be 1000 0001
1000 0000 1000 0001
1000 0101 1000 0101
NOTE 4-The reply to the "REQUEST WHETHER SETUP IS DEFINED" is as in TYPE 3 above, except that here the OUTPUT is
assigned with the value 0 if the setup is not defined; or 1 if it is defined.
NOTE 5-An error code is returned to the PC if an invalid code was sent to the switcher (e.g. trying to save to a setup greater than 8, 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 6–This code is reserved for internal use.
NOTE 7-SETUP # 0 is the present setting. SETUP # 1 to SETU P# 8 are the settings saved in the switcher's memory, (i.e. those used
for Store and Recall).
NOTE 8-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, auto-save function is set.
NOTE 9–This is identical to instruction 3 (machine uses instruction 3, when sending to PC).
NOTE 10–This is identical to instruction 4 (machine uses instruction 4, when sending to PC).
NOTE 11-This is a request to identify the switcher/s in the system. If 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, the reply to the request to send machine name (for machine
number 001) would be:
0111 1101
1000 1000 (i.e. 128 + 8)
1000 1000 (i.e. 128 + 8)
1000 0001
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 would be:
0111 1101
1000 0011 (i.e. 128 + 3)
1000 0101 (i.e. 128 + 5)
1000 0001