FOXBORO RH917YZ Redundant module

The above example shows how the ECAM program is structured and how the commands can be given to the controller. The next page provides the results captured by the WSDK program. This shows how the motion will be seen during the ECAM cycles. The first graph is for the X axis, the second graph shows the cycle on the Y axis and the third graph shows the cycle of the Z axis. The DMC-18x2 also provides a contouring mode. This mode allows any arbitrary position curve to be prescribed for 1 to 4 axes. This is ideal for following computer generated paths such as parabolic, spherical or user-defined profiles. The path is not limited to straight line and arc segments and the path length may be infinite.

Specifying Contour Segments 

The Contour Mode is specified with the command, CM. For example, CMXZ specifies contouring on the X and Z axes. Any axes that are not being used in the contouring mode may be operated in other modes. A contour is described by position increments which are described with the command, CD x,y,z,w over a time interval, DT n. The parameter, n, specifies the time interval. The time interval is defined as 2n ms, where n is a number between 1 and 8. The controller performs linear interpolation between the specified increments, where one point is generated for each millisecond. Consider, for example, the trajectory shown in Fig. 6.5. The position X may be described by the points

Additional Commands 

The command, WC, is used as a trippoint "When Complete" or “Wait for Contour Data”. This allows the DMC-18x2 to use the next increment only when it is finished with the previous one. Zero parameters for DT followed by zero parameters for CD exit the contour mode. If no new data record is found and the controller is still in the contour mode, the controller waits for new data. No new motion commands are generated while waiting

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