Rs232 Protocol - AMC OCTO User Manual

RS232 protocol

First input- first input for which volume level will be decrease by RS232 com-
mand. Value range 01... 08
Last input- last input for which volume level will be decrease by RS232 com-
mand. Value range 01... 08 First and last inputs must be the same in order to
adjust volume juts for one input.
Step size - This is a step in dB how much volume will effected. Recommended
value 1... 12
Check sum - HEX sum of section, operation, first input, last input and reserved
byte.
Example:
RS232 command to decrease input 2 and input 3 volume in 3 dB step
Lead
Code Section Operation
A5 AB 02 34
Check sum HEX ∑ 02 34 02 03 02 = 3D
RS232 command: A5 AB 02 34 02 03 02 3D
RS232 command to decrease inputs 7 volume in 1 dB step
Lead
Code Section Operation
A5 AB 02 34
RS232 command to decrease inputs 7 volume in 1 dB step
45 USER MANUAL OCTO Digital signal processor
First Last Step Check
input input Size
02 03 02
First Last Step Check
input input Size
07 07 01
Check sum HEX ∑ 02 34 07 07 01 = 45
RS232 command: A5 AB 02 34 07 07 01 45
Operation - to decrease output volume by step
Lead
Code Section Operation
A5 AB 04
First output - first output for which volume level will be decrease by RS232
command. Value range 01... 08
Last output- last output for which volume level will be decrease by RS232
command. Value range 01... 08 First and last output must be the same in order
to adjust volume juts for one output.
Sum
Step size - This is a step in dB how much volume will effected 1... 12
Check sum - HEX sum of section, operation, first output, last output and
3D
reserved byte.
Example:
RS232 command to decrease volume in 3 dB step to all outputs
Lead
Sum Code Section Operation
45 A5 AB 03
Check sum HEX ∑ 03 34 01 08 03 = 43
RS232 command: A5 AB 03 34 01 08 03 43
First Last Step
output output Size
35 XX XX XX
First Last Step
output output Size
34 01 08 03
Check
Sum
XX
Check
Sum
43