Lenze PLC Designer PLC Designer (R3-1) - Manual (Page 567)

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General Editors
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DMS 4.1 EN 03/2011 TD29 565
Keeping this physical interpretation in mind it is evident that the mapping has to be
continuous, that is its graph shows no jumps. In particular, this must hold for each
point, where two intervals collide. Furthermore, in general also the first and second
derivative are required to be continuous. (In fact, these three continuity demands
claimed for the start point of an interval as well as for the endpoint uniquely define
the quintic polynomial inserted between two lines.)
Additionally, if the CAM disk is defined as periodic transition, the values of the
mapping and of the first and second derivative at the end position of the slave must fit
the corresponding values at its start position (the value of the mapping at the end
position being also allowed to be a multiple of the value at the start position).
Moreover, tappets, that is binary switches, can be added to the CAM disk at arbitrary
positions. Especially, Digital CAM tables may be created, that is CAM tables with
tappets only, by setting the slave position equal to zero over the whole range of
master positions.
13.1.3 Creation of CAM disk
A CAM disk is an object that can be added to a project or application. Therefore select
the project (either in the Device or in the POUs window) or the application and activate
the entry Add object... of the context menu, whereon the "Add object"-dialog will
open.
Abb. 304 Add object dialog
Therein pick the entry CAM table, enter a name ("CAM" by default) and confirm with
Open. The CAM disk is inserted in the device tree (or POUs tree) and the CAM-Editor
opens displaying the default settings of a newly created CAM disc.