ELPRO TZM1612 Manual page 19

TZM1612
According to the protocol used, the messages exchanged between the host and TZM1612
are amongst the following control characters:
- command from host to TZM1612:
STX ADDR command ETX
- reply of the TZM1612 to the host:
STX ADDR reply ETX
The character STX corresponds to 02 hex,
the character ETX corresponds to 03 hex,
the ADDR field is the address of the TZM1612: from 30 hex to 37 hex (or from 0 to 7 in ASCII)
The contents of the command and reply fields are the same as the commands indicated
above for the RS232 protocol except for the CR character (hex 0D) which is omitted in this
case.
8.1 COMMANDS MANAGED
The commands that can be sent via RS485 are all those envisaged for RS232 except for the
"Set RS485 communication parameters" command:
- video and audio switching command
- video switching command
- audio switching command
- status request
- creation of a preset
- recall of a preset
- firmware release identification request.
- global status request
- set switching through blank time
- switching through blank time request
Example: in this case the format of the video switching command will be as follows:
STX ADDR VXXYY ETX
The TZM1612 matrix replies:
STX ADDR ACK ETX
if the command has been performed correctly
STX ADDR NACK ETX
if transmission errors have been detected or incorrect parameters.
Therefore, the switching command of video input 5 to bus 4 for the TZM1612 with address 2
will be as follows:
STX 2 V 04 05 ETX (in Hex code: 02 32 56 30 34 30 35 03)
the matrix will reply with:
STX 2 ACK ETX
or with:
STX 2 NACK ETX
ELPRO Video Labs s.r.l. ELPRO Video Labs s.r.l.
19
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where: V is the character Hex 56
XX is the output
YY is the video input
where: ACK is the character Hex 06
where NAK is the character Hex 15
(in Hex code: 02 32 06 03)
(in Hex code: 02 32 15 03)
16x12 RGBHV & AUDIO MATRIX
(from 01 to 12)
(from 01 to 16)