Create Cam Data; Memory Configuration Of Cam Data - Mitsubishi Electric MELSEC iQ-R Series User Manual

3.2

Create Cam Data

Memory configuration of cam data

Cam data is arranged in the following 2 areas.
Memory configuration
Cam storage area
Cam open area
• RD77MS
Previously written cam data can be used after turning the power supply OFF by writing data in the cam storage area. Cam
data should be written in the cam storage area for normal use.
• RD77GF
When the module extended parameter storage location is set to "Simple Motion module", previously written cam data can be
used after turning the power supply OFF by writing data in the cam storage area.
When the module extended parameter storage location is set to "CPU module", data written in the cam storage area with the
cam data operation function and the cam auto-generation function is lost by turning the power supply OFF. Refer to "Memory
Configuration and Data Process" in the following manual for details.
MELSEC iQ-R Simple Motion Module User's Manual (Application)
[RD77GF]
When the module extended parameter storage location is set to "Simple Motion module", there is the upper
limit of writing numbers to the cam storage area (flash ROM). If the writing numbers to the flash ROM exceed
the upper limit, the writing to the flash ROM may be disabled and the error "Flash ROM write error" (error
code: 1931H) will occur.
It is recommended that data which is not necessary to be held at the power supply OFF is not written in the
cam storage area with the cam data operation function and the cam auto-generation function.
It is possible to write directly to the cam open area via buffer memory when registering cam data that exceeds the memory
capacity in the cam storage area, etc. (Page 75 Cam data operation function) However, writing must be executed to the
cam open area every time due to clearing the data at the power supply OFF.
3 CAM FUNCTION
70
3.2 Create Cam Data
Storage item Details
Cam data Data is written by the following operations.
• Write with the engineering tool
• When executing "write (Cam storage area)"
Cam auto-generation data Data is written when the cam auto-generation
request is executed. (Cam auto-generation
function)
Cam data Cam data is transmitted from the cam storage
area by the following operations.
• Power supply turn ON
• Write to the cam storage area
• PLC READY signal [Y0] OFF to ON
• When specifying the cam open area with the
• When executing the cam auto-generation
with the cam data operation function.
[RD77MS]
cam data operation function
function
Remark
• Data is preserved even when turning the
power supply OFF. [RD77MS]
• When the module extended parameter
storage location is set to "Simple Motion
module": Data is preserved even when
turning the power supply OFF. [RD77GF]
• When the module extended parameter
storage location is set to "CPU module":
Data written in the cam storage area is lost
when turning the power supply OFF.
[RD77GF]
• Data is lost when turning the power supply
OFF.
• The cam data that is used in cam control is
stored.