Toshiba 6F3B0253 user manual About the built-in Eeprom

6F3B0253

5. Operating System Overview

5.2 About the built-in EEPROM

The T1-16S is equipped with a built-in EEPROM and a RAM as standard features. The user program is stored in the EEPROM so that the user program can be maintained without the need of a battery. A part of the Data register can also be stored in the EEPROM.

The table below shows the contents stored in the built-in EEPROM.

	T1-16S
User program	Entire program (8 k steps) and System information
User data	User specified number of Data register starting with address 0.
	It is set by SW55.
	D0000 - Dnnnn
	(up to 2048 words)
Setting	SW36 - SW38:
information	Programmer port settings
	SW55:
	Number of Data register to be saved in the EEPROM
	SW56 - SW57:
	RS-485 port settings
	Sampling trace setting information

The user program and the data stored in the EEPROM are transferred to the RAM when power is turned on. Subsequent program execution is done based on the RAM contents. Program editing is also performed on the RAM contents.

Therefore, if the program is modified, it is necessary to issue the EEPROM Write command from the programming tool. Otherwise, the modified program is over- written by original EEPROM contents when the power is turned off and on again.

66 T1-16S User’s Manual