Mitsubishi Electric MELSEC iQ-R RD78G4 - Cam Auto-Generation Function

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3 CAM FUNCTION
3.2 Create Cam Data
Cam auto-generation function
The cam auto-generation function is used to generate cam data automatically for specific purposes based on parameter
settings.
With this function, cam data is generated in the cam open area.
Up to 1 Mbyte data including the normal cam data can be generated. (Example: 256 cam data (with the stroke ratio format,
resolution is 1024) can be automatically generated.)
The processing time of cam auto-generation takes longer if the data point is larger. Also, the real processing time changes by
status of axis start etc.
(Reference) Relationship between the cam resolution and processing time in the cam auto-generation (Stroke ratio data
format)
• When "[Cd.608] Cam auto-generation request" is set to "1: Cam auto-generation request (with writing to the storage area)"
*1 For 4 axes with an operation cycle of 0.25[ms], the operation cycle may be exceeded if the cam auto-generation is performed during
synchronous control. The above table shows the result values when the operation cycle is exceeded.
• When "[Cd.608] Cam auto-generation request" is set to "2: Cam auto-generation request (without writing to the storage
area)"
*1 For 4 axes with an operation cycle of 0.25[ms], the operation cycle may be exceeded if the cam auto-generation is performed during
synchronous control. The above table shows the result values when the operation cycle is exceeded.
Maximum
number of
control axes
Operation
cycle[ms]
Cam resolution
256 4096 32768
2 0.25 3894299[s] 3600287[s] 4411035[s]
2 0.50 2889707[s] 2987577[s] 2810317[s]
4 0.25 9398086[s]
*1
7706081[s]
*1
7880088[s]
*1
4 1.00 2699020[s] 2695794[s] 2797026[s]
8 0.50 5500506[s] 6594591[s] 6623158[s]
16 1.00 5298250[s] 4803019[s] 5325880[s]
16 2.00 2992939[s] 3595699[s] 3203206[s]
Maximum
number of
control axes
Operation
cycle[ms]
Cam resolution
256 4096 32768
2 0.25 481[s] 2686[s] 20274[s]
20.50 80[s] 1406[s] 10803[s]
4 0.25 1001[s]
*1
11474[s]
*1
86978[s]
*1
41.00 81[s] 1159[s] 9697[s]
8 0.50 490[s] 5054[s] 37039[s]
16 1.00 81[s] 4045[s] 26203[s]
16 2.00 81[s] 1621[s] 11741[s]