Kramer Electronics VS-41HDCP User Manual

Page 37

VS-41HDCP - Kramer Protocol

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

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).

If the OUTPUT is set as 1, then the ASCII coding of the lettering following

the machine’s name is sent. For

example, for the VS-7588YC, the reply to the request to send the first suffix would be (HEX codes):

81 (i.e. 128dec+ ASCII for “Y”; 128dec+ ASCII for “C”).

NOTE 14 - The number of inputs and outputs refers to the specific machine which is being addressed, not to
the system. For example, if six 16X16 matrices are configured to make a 48X32 system (48 inputs, 32
outputs), the reply to the HEX code

82 (ie. request the number of outputs)

would be HEX codes

ie. 16 outputs

NOTE 16 -

The reply to the “REQUEST WHETHER PANEL IS LOCKED” is as in NOTE 4 above, except that

here the OUTPUT is assigned with the value 0 if the panel is unlocked, or 1 if it is locked.

NOTE 19

– After this instruction is sent, the unit will respond to the ASCII command set defined by the

OUTPUT byte. The ASCII command to operate with the HEX command set must be sent in order to return to
working with HEX codes.

NOTE 25

– For units which detect the validity of the video inputs, Instruction 16 will be sent whenever the unit

detects a change in the state of an input (in real-time).

For example, if input 3 is detected as invalid, the unit will send the HEX codes

If input 7 is detected as valid, then the unit will send HEX codes

81.