Data To Be Used With Simple Cam Function - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

12. APPLICATION OF FUNCTIONS

12.1.7 Data to be used with simple cam function

CAUTION
(1) Memory configuration of cam control data and cam data
The cam control data and the cam data used for the simple cam are stored in Flash-ROM inside the
servo amplifier. When the power is turned on, the cam data and the cam control data are copied from
the Flash-ROM to the RAM inside the servo amplifier, and then cam control will be executed.
Writing
MR Configurator2
Reading
Temporary
writing
Programmable
controller
Reading
Note. When the power is turned on, the cam data and the cam control data are copied from the Flash-ROM to the RAM.
Use MR Configurator2 or Modbus-RTU communication to write the cam data and the cam control data.
Be sure to write the cam data and the cam control data in servo-off state.
When writing the data via Modbus-RTU communication, transfer the cam data created using MR
Configurator2.
Modbus-RTU communication uses Request store CAM (2D88h), CAM area (2D89h), and CAM data in
CAM area (2D8Bh). Refer to section 12.1.7 (5) for details of each register.
Note that the number of write times to the Flash-ROM where the cam control data
and cam data are stored is limited to approximately 10000. If the total number of
write times exceeds 10000, the servo amplifier may malfunction when the Flash-
ROM reaches the end of its useful life. If data needs to be changed very
frequently, use the temporal writing function and write the data to the RAM, not to
the Flash-ROM.
POINT
When [AL. F5.2 Cam data miswriting warning] occurs during cam data writing,
set [Pr. PT34] to "5010" to initialize the cam data.
MR-J4-_A_-RJ Servo amplifier
Flash-ROM (64 Kbytes)
Cam storage area
8 Kbytes
Cam control data
storage area
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RAM
(Note)
Working area for
cam data 8 Kbytes
Working area for
(Note)
cam control data
12 - 8
Cam data used for actual
cam control is stored
Cam control