Command WriteReadBin :

send a command to the controller and return the reply

WriteReadBin Definition
Input Argument	Tango::DEV_STRING	command to send (for GCS special commands, no newline appended)
Output Argument	Tango::DEV_STRING	answer from controller
DisplayLevel	OPERATOR	..
Inherited	false	..
Abstract	false	..
Polling Period	Not polled	..
Command allowed for	All states	..