Mitsubishi Electric LD77MH, User Manual

Page: 96 / 238

3 - 12
Chapter 3 Cam Function
Cam data operation with GX Works2
Cam data can be modified while viewing the waveform with GX Works2.
The cam data is written/read/verified to the cam storage area with GX Works2, 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 of the "Cam Data"
through reading with GX Works2.
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. (Refer to Section 3.2.2 "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.
Operation method
Data method/
Auto-generation type
Cam storage area
(262144 bytes)
Cam open area
(1048576 bytes)
Create with
GX Works2
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 bytes Cam resolution 4 bytes
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 GX Works2 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 GX Works2 to delete only cam data.
Password protection for cam data
The cam data can be protected as shown below by password setting.
Password setting Cam data operation with GX Works2 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. Writing cam data and generating cam data
auto-generation is not operated.
The password for cam data is deleted with cam data by "[Cd.2] Parameter initialization
request".