User guide

Hardware

890 USE 108 00 August 2001

Writing to

EEPROM

Auxiliary

Memory

Using either Modsoft or Modsoft Lite programming software, you may write the

configuration and user logic to the EEPROM card. Users of the A984 Compact

controller may also predefine controller startup RUN state conditions and save 4X

registers. You may write to the EEPROM card while the controller is running and

while Modbus activity is occurring. However, no activity that writes to user memory

is allowed while writing to EEPROM is occurring.

CAUTION

Do not insert EPROM card if controller is ON.

An EEPROM card must be inserted into or removed from the socket

only when the controller is OFF. Insertion or removal while the controller

is powered up can damage the EEPROM card.

Failure to observe this precaution can result in injury or

equipment damage.

Note: It is recommended that the Compact be in STOP Mode.

After inserting a blank EEPROM card into the controller, ensure that the memory

protect switch is in the ON position before turning power back on. If the switch is in

the OFF position, the controller will attempt to read a blank card at power up.

To write to an EEPROM card, you must be ON LINE or in Combine mode in

Modsoft. Under PLC OPS menu select Save to FLASH/EEPROM. If earlier

software versions are used, after download the controllers will start (or not start)

based on the last power-down state; 4X registers are not saved; and state RAM is

cleared if the controller powers up from Dim Awareness. If your user logic requires

specific information in state RAM, it must be initialized by the user logic.

Using any version of panel software, the 0984 series (ONLY) Compact controllers

saves the configuration and user logic but not the 4X register data. State RAM is

not cleared, and if your user logic requires specific information in state RAM, it must

be initialized by the user logic. Also, after download, the controller will come up in

its previous operating mode (RUN or STOPPED).

The write procedure verifies that an EEPROM card is actually present in the socket

and that the card has enough memory to store all the system data. It then

computes the checksum and verifies that the data has been written successfully. If

any errors occur in the writing process, an error message pops up on the screen;

if no errors are encountered, a message pops up to inform you that the EEPROM

write procedure has been accomplished.