Mitsubishi Electric MELSERVO MR-J4-03A6-RJ, Instruction Manual

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12. APPLICATION OF FUNCTIONS
12 - 8
12.1.7 Data to be used with simple cam function
CAUTION
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.
(1) Memory configuration of cam control data and cam data
POINT
When [AL. F5.2 Cam data miswriting warning] occurs during cam data writing,
set [Pr. PT34] to "5010" to initialize the 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.
Cam data used for actual
cam control is stored
MR-J4-_A_-RJ Servo amplifier
Reading
Flash-ROM (64 Kbytes) RAM
Cam storage area
8 Kbytes
Working area for
cam data 8 Kbytes
Cam control data
storage area
Working area for
cam control data
Cam control
Writing
MR Configurator2
Programmable
controller
Reading
Temporary
writing
(Note)
(Note)
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.
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