Quantum Composers Motorized Attenuator - Manual (Page 7)

terminated with a . If a query command is not recognized by the device, then a
"?0" is returned.
Common Commands
All devices are required to support some common commands as part of their command
set. Those commands are:
Command Description
VN Return firmware version
number
RS Reset, return to power-up
defaults.
Global Commands
By using a special prefix (the * character), it is possible to send a command to all the
devices at once. When a global command is sent, no device will send a response.
Command Description
*RS Reset, return to power-up
defaults. All devices
Command Set
AP #### Set to attenuator to percentage of max. Parameter = 4-digit hex
value 0000h – 03E8h (0 to 1000). 0000 closes the shutter, any
other value opens the shutter.
AP? Returns the current attenuator position in a 4 digit hex value from
0000h to 03E8h.
EC # Echo characters received on the serial port. Parameter (0 = echo
off (default), 1 = echo on.
EC? Returns the state of the echo parameters.
HM Home Motor. Moves motors to limits, then returns to default
position.
RS Resets all motors, returns to power up defaults and homes the
motors
SH # Shutter Open / Shutter Closed (1 = close shutter, 0 = open shutter).