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4-1
Hardware and Installation User Manual
CHAPTER 4
EPROM/EEPROM OPERATION
4.1
INTRODUCTION
The TI525/TI535 controllers offer the option of saving the RLL program to an
Electrically Erasable Programmable Read Only Memory (EEPROM) without
the use of a separate programming device. The RLL program is downloaded
directly from the PLC RAM to a 256 kbyte EEPROM (PPX:2587681–8020).
NOTE
The EEPROM holds only the ladder logic program and the I/O
configuration. Other information stored in memory is cleared if
power is cycled without a battery backup.
Once an EEPROM is programmed, you may use it in any of the TI525/TI535 or
TI530T models. The only limitation is program size. The PLC must have enough
memory to store and execute the program contained on the EEPROM. You can
erase an EEPROM with a programming device that is capable of executing
Auxiliary (AUX) Function 84. A TI525/TI535 EEPROM cannot be used in
SIMATIC
TI520
, SIMATIC
TI530
, SIMATIC
TI520C
, or SIMATIC
TI530C
models.
If you choose, you may program an EPROM in a TI520C or TI530C and use the
EPROM in any of the TI525/535 PLCs. The PLC must have the memory
capacity to execute the program. Although they do not copy a program to an
EPROM, all TI525/TI535 models can read and execute an EPROM program
with which they are compatible. You may also save a program to the EEPROM
and then use an EPROM programmer to copy the program from EEPROM to
EPROM.
To ensure equipment compatibility use only the EPROM model supplied by
your distributor: (PPX:2587681–8012).
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