Mitsubishi Electric MELSEC iQ-R RD78G4 - Page 86

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3 CAM FUNCTION
3.2 Create Cam Data
Cam data operation with an engineering tool
Cam data can be modified while viewing the waveform with the engineering tool.
The cam data is written/read/verified to the cam storage area with the engineering tool, however it cannot be executed to the
cam open area.
The waveform generated by the cam auto-generation function can be confirmed by the "Cam graph" of the "Cam Data
window" from the Navigation window  "Cam Data" through reading with the engineering tool.
Cam data operation with buffer memory
It is possible to specify the area where cam data is written. The cam data is read from the cam open area. (Page 85 Cam
data operation function)
With the cam auto-generation function, auto-generation data is saved in the cam storage area, and the cam data is generated
into the cam open area.
Cam data capacity
The size of the created cam data is shown below for the cam storage area/cam open area.
When writing with the cam data operation function or when the cam auto-generation function is executed, the writing area free
capacity size may decrease since the size changes depending on the cam resolution change, etc. In this case, write the cam
data with the engineering tool or delete them once.
Delete method of cam data
The data of cam storage area/cam open area can be deleted (initialize) by the parameter initialization function with a
parameter setting and positioning data. The parameter initialization function is executed by setting "1" in "[Cd.2] Parameter
initialization request".
Write the empty data in the cam storage area with the engineering tool to delete only cam data.
Password protection for cam data
The cam data can be protected as shown below by password setting.
Operation method Data method/Auto-generation
type
Cam storage area
(262144 bytes)
Cam open area
(1048576 bytes)
Create with an engineering tool Stroke ratio data format Cam resolution  4 bytes Cam resolution  4 bytes
Coordinate data format Coordinate number  8 bytes Coordinate number  8 bytes
Create in cam storage area with cam
data operation function
Stroke ratio data format Cam resolution  4 bytes Cam resolution  4 bytes
Coordinate data format Coordinate number  8 bytes Coordinate number  8 bytes
Create in cam open area with cam
data operation function
Stroke ratio data format 0 byte Cam resolution  4 bytes
Coordinate data format Coordinate number  8 bytes
Create with cam auto-generation For a rotary cutter 28 byte Cam resolution  4 bytes
Password setting Cam data operation with an engineering tool Cam data operation with buffer memory
Password for read protection Cam data cannot be read without unlocking the password
for read protection.
Reading cam data is not operated.
Password for write protection Cam data cannot be written without unlocking the
password for write protection.
Cam data writing and cam data auto-generation are not
operated.