NEC E437Q External Controls - Page 6

4. Communication Format Header Message Check Code Delimiter The command packet consists of four parts, Header, Message, Check code and Delimiter. Note: Don't add extra data (Example: padding data) after Delimiter. Recommended sequence of a typical procedure to control a monitor is as follows, [A controller and a monitor, two-way communication composition figure] ■ For the general command (see the part "6.3. Operation Code (OP code) Table") Controller Monitor Get Parameter Get Parameter Reply Set Parameter Set Parameter Reply Get Parameter Get Parameter Reply The controller sends command to get a value from the monitor that you want to change. The monitor replies a current value of the requested item. The controller sends commands to set an adjusted value. The monitor replies to the controller for confirmation. The controller sends command to get a value for confirmation. The monitor replies an adjusted value. ■ For the special command (see the part 7 to 24. and 5.5.2) Controller Command Command Reply Monitor The control does not suitable for above fixed protocol; use the proper command for each control. Please refer section 5.5 and section 7 to 26. The monitor replies a proper message defined for each (6/47)