FSR ML-800 - Manual (Page 30)

30 ML - 800
WALLPLATES (optional)
The wallplates used in the ML-800 system are either membrane or touch. They control all wallplate
functions. These functions include Music Selection, Local Mixer, Music Enable and Volume, and Mi-
crophone Enable and Volume.
When the wallplates sense a key press or touch, it waits for a poll from the ML-800 RACK then it sends
a message to the ACU which will return an update message. The wallplates will then check for another
touch or keypress and repeat. Internal flags will prevent the wallplates from acting on the same keypress
or touch until the update message is returned. This whole process occurs within a fraction of a second.
The wallplates communicate with the ML-800RACK over a RS-422 line and are addressable. This
address is a 5 bit address (0-31) allowing the use of up to two (2) wallplates per room.