5-10
Using an EEPROM or EPROM
TI545/TI555 System Manual
5.5
Editing a Program Stored in EEPROM
You can edit the program and data stored in an EEPROM by following the
steps listed below.
NOTE:
If necessary, refer to your SIMATIC TI505 Programming Reference
manual for detailed instructions about executing AUX Functions.
1.
Using your programming unit and the AUX Function 84 option, select
EEPROM as the program source. This will copy the EEPROM program
to RAM.
Electronic devices can operate in an unsafe condition that can
cause death or serious injury and/or damage to equipment.
When you select EEPROM, the controller is cleared and then
loaded with the EEPROM content. This clears V-memory and resets
all timers, counters, and drums, etc.
Be sure that you really want to select EEPROM.
2.
Select RAM as the program source.
3.
Edit the program source code (in RAM memory) as required.
4.
Use the AUX Function 84 to erase program data on the EEPROM.
5.
Copy the RAM program back to EEPROM.
6.
Select the EEPROM as the program source.
Although the CPU can copy a program from either an EEPROM or an
EPROM into RAM, the CPU cannot copy a program from RAM to an
EPROM.
NOTE:
AUX Function 84 will not download timer/counter and drum/event
presets, and values in V-memory.
WARNING
!