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Outline Of Rom Operation - Mitsubishi Electric MOTION CONTROLLERS Q172DCPU Programming Manual

Melsec q series motion controller.
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4 AUXILIARY AND APPLIED FUNCTIONS

4.4.2 Outline of ROM operation

When the ROM writing is requested to the Motion CPU module using the MT
Developer, the programs and parameters stored in the SRAM built-in Motion CPU
module are batch-written to the FLASH ROM, after the data of FLASH ROM built-in
Motion CPU are erased.
When the Motion CPU starts in the "Mode operated by ROM", a normal operation
starts, after the data written in the FLASH ROM is read to the SRAM.
The programs and parameters created by the MT Developer must be written
beforehand to the FLASH ROM built-in Motion CPU module at the ROM operation.
The following methods for ROM writing are shown below.
• Write the programs and parameters written in the SRAM built-in Motion CPU module
to the FLASH ROM built-in Motion CPU module.
• Write the programs and parameters of the MT Developer to the SRAM built-in Motion
CPU module, and then write them to the FLASH ROM built-in Motion CPU module.
The data batch written to the FLASH ROM built-in Motion CPU module by ROM writing
are shown below. Backup data except the followings (current position of servomotor in
absolute position system, home position and latch device.) cannot be written to the
FLASH ROM.
SV13
Each parameter for servo control
Motion SFC parameter
POINT
(1) "Backup • load" operation of the MT Developer targets the SRAM built-in
Motion CPU module. (The FLASH ROM built-in Motion CPU module is not
targeted.)
Set to "Mode operated by ROM" after ROM writing to execute the ROM
operation after "Backup • load" operation at the Motion CPU module
exchange.
(2) The FLASH ROM built-in Motion CPU module serves as a life in 100000 times
writing. Make the ROM writing within 100000 times. If it passes over a life,
"writing error" will occur, replace the Motion CPU module.
(3) The online change of Motion SFC program executes the Motion SFC program
performed the online change from the next scanning at the mode operated by
ROM. Operation starts with the contents of the Motion SFC program written in
the FLASH ROM built-in Motion CPU module at next power supply on or reset.
(4) It needs to meet the following conditions for the ROM writing.
(a) PLC ready flag (M2000) OFF
(b) Not installation mode
System setting data
Servo program
Motion SFC program
Mechanical system program
Cam data
4 - 14
SV22

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