Mitsubishi Electric MELSEC-L LD75P User Manual page 313

(5) Flash ROM write (
The following transmission process is carried out by setting "1" in "[Cd.1] Flash ROM write request" (buffer
memory [1900]).
• The "parameters", "positioning data (No. 1 to 600)" and "block start data (No. 7000 to 7004)" in the buffer
memory area are transmitted to the flash ROM.
The writing to the flash ROM may also be carried out using a dedicated instruction "ZP.PFWRT". (Refer to 
Page 619, CHAPTER 14 for details.)
(6) Flash ROM write request (
The following transmission processes are carried out with [flash ROM write request] from GX Works2.
• The "parameters", "positioning data (No. 1 to 600)" and "block start data (No. 7000 to 7004)" in the buffer
memory area are transmitted to the flash ROM. (This transmission process is the same as (5) above.)
For details on [flash ROM write request] using GX Works2, refer to the following.
 GX Works2 Version 1 Operating Manual (Intelligent Function Module)
● Do not turn the power OFF or reset the CPU module while writing to the flash ROM. If the power is turned OFF or the
CPU module is reset to forcibly end the process, the data backed up in the flash ROM will be lost.
● Do not write the data to the buffer memory before writing to the flash ROM is completed.
● The number of writes to the flash ROM with the program is 25 max. while the power is turned ON. Writing to the flash
ROM beyond 25 times will cause the error "Flash ROM write number error" (error code: 805).
Refer to  Page 650, Section 15.5 for details.
CHAPTER 7 MEMORY CONFIGURATION AND DATA PROCESS
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