Buttons; Input And Output Selectors; Meters; Leds - Symetrix Composer v7.0 Manual

Calculating the Volume in dB from the Volume Percentage
would be done as follows:
Volume in dB = (Volume Percent * (User Max – User Min)) + User Min
In this example, the volume in dB corresponding to 50% of
the volume would be calculated as:
Volume in dB = 50% * ((+6) – (-30)) + -30 = -12 dB

Buttons

Buttons such as a mute or bypass can be controlled
similarly with controller positions by sending the minimum
value (0) to turn the switch off (button not pushed) and
sending the maximum value (65535) to turn the switch on
(button pushed).

Input and Output Selectors

A value of zero (0) will select the first input or output and a
value of (65535) will select the last input or output. Other
values are selected by sending evenly spaced (linear) values
as shown by the formula below:
Controller Value = (INPUT NUMBER - 1)
*65535/(NUMBER OF INPUTS - 1)
Note: for an output selector, replace "INPUT" with
"OUTPUT" above.

Meters

Meters can be read via RS-232 or Ethernet. The read back
value will be linear in dB with 65535 representing +24 dBu (0
dBFS) and 0 representing -48 dBu (-72 dBFS) (or less). The
formula below can be used to calculate a dB reading from a
controller value:
Level dBu = 72*(CONTROLLER VALUE/65535) - 48
If CONTROLLER VALUE = 0, Level dBu <= -48 dBU
Input and output meters in some other modules such as
Compressors and AGCs can also be read. In this case, the
read back value will be linear in dB with 65535 representing
the maximum value shown on the meter and 0 representing
the minimum value shown on the meter (or less). The
formula below can be used to calculate a dB reading from a
controller value:
Level dB = (MAXIMUM VALUE - MINIMUM VALUE)
*(CONTROLLER VALUE/65535) + MINIMUM VALUE
If CONTROLLER VALUE = 0, Level dB <= MINIMUM VALUE
Where MINIMUM VALUE is the meter's lower limit in dB and
MAXIMUM VALUE is the meter's upper limit in dB.
Control meters in dedicated control meter modules can
also be read. In this case, the read back value will be linear
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with 65535 representing 100% and 0 representing 0%.
The formula below can be used to calculate a percentage
reading from a controller value:
Level % = 100*(CONTROLLER VALUE/65535)
Note: Meters are a "read-only" parameter. Attempting to
change the meter value will have no effect.

LEDs

LEDs in various modules can be read via the control
protocol. The read back value will be either 65535 if the LED
is on or 0 if the LED is off.
Note: LEDs are a "read-only" parameter. Attempting to
change the LED value will have no effect.

Diagnostic Controls

Connected LED
The read back values are:
Network Diagnostics Panel
DHCP Enabled LED - Only DHCP Enable can be read unless
using SymVue. The read back values are:
65535 = DHCP Enabled
Power Supply Diagnostics Panel
All voltages are in .001V increments offset by 32768. The
read back values of 0-65535 translate to -32.768V-32.767V.
Status LED - The read back values are:
Thermal Diagnostics Panel
Peak temperature date and time can only be read in
SymVue. All temperatures are in .01 degree C increments
offset by 32768. The read back values of 0-65535 translate
to -327.68V-327.67V.The Fan speed is 0-65535 Hz.
Status LED – Send -65535 to clear, The read back values are:
Control Diagnostics Panel
All read back values:
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Parameter Notes
0 = Disconnected
65535 = Connected
0 = DHCP Disabled
0 = OK
65535 = Failed
0 = OK
65535 = Failed
0 = Inactive/Off
65535 = Active/On