Experimental Physics and
Industrial Control System

彭少丽 <[email protected]> · Tue, 29 Mar 2011 10:23:56 +0800 (CST)

To EDM experts,

    I'm trying to use the "Button" object,and confused by the relative help information,which likes below:

    (1) Button pressed,control PV=Readback PV,3D=YES
    (2) Button released,control PV=Readback PV,3D=YES
    (3) Button pressed,control PV!=Readback PV,3D=YES
    (4) Button released,control PV!=Readback PV,3D=YES
    (5) Readback indicator,Readback=True,3D=NO
    (6) Readback indicator,Readback=False,3D=NO

   In my mind, when the button is pressed, the control PV value is set and equal to the Readback PV Value.
 While the button is released, the control PV has no relationship with the Readback PV Value.However,the fact is similaly
not like that. When th button was pressed,the Readback PV Value hasn't converted to the Control PV Value. 
  So,who can tell me the real meaning of the above messages, and how to configure the Button Properties? 

Any suggestion will be much appreciated,

                       Shaoli

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System