3G5A2-RPT01-PE datasheet(42/182 Pages) OMRON

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RAM and EEPROM Cards

Data can be randomly written to and read from RAM or EEPROM Cards, making

it possible to easily stored programs. The memory of a RAM Cards is erased,

however, when power is not supplied to the CPU or when the RAM Card is re-

moved from the CPU without first being connected to a backup battery. EE-

PROM Cards cannot be written while mounted in the CPU. Data can be written

to RAM Cards while they are mounted in the CPU by using the CVSS or by in-

structions in the user program.

Both the RAM and EEPROM Memory Cards are equipped with write-protect

switches. Setting the write-protect switch to ON prevents data from being written

to or erased from the Card. Setting the write-protect switch to OFF allows data to

be written to or erased from the Card.

OFF

Four RAM Memory Card models are available, varying in memory capacity from

8K, 16K, 32K to 64K words. Two EEPROM Memory Card models are available,

one containing 8K words of memory and the other 16K words of memory.

RAM Card Backup Battery

Insert a battery into a RAM Memory Card before mounting the Card into the

CPU. Leave the battery in its holder. Battery life expectancies are given below.

Replace the battery within the time listed. Refer to

Section 4 Inspection and

Maintenance for the battery replacement procedure.

Card

Capacity

Life

HMC-ES641

64K bytes

5 years

HMC-ES151

128K bytes

2 years

HMC-ES251

256K bytes

1 year

HMC-ES551

512K bytes

6 months

EPROM Cards

Data contained in the ROM Card is stored on EPROM chips and cannot be al-

tered or erased during the CPU’s operation. The EPROM chip is mounted to the

Memory Card and the entire pack is installed in the CPU. Once data is written to

the chip, the data will not be lost when the power to the PC is OFF.

ROM Cards are shipped unprogrammed. The ROM Card can be programmed

using a CV500-MCW

jj Memory Card Writer.

The procedure for erasing EPROM Memory Card data is as follows:

1, 2, 3...

1. Open the memory card cover by pressing at an angle on the catch at the

bottom edge of the card using a pointed object, such as a pen.

2. Erase the data from the EPROM chips by exposing the window of the

EPROM chips to ultraviolet light. Any of a number of commercially available

EPROM erasers may be used. To ensure complete erasure, the Memory

Card should be subject to a minimum exposure as specified by the eraser

manufacturer.

3. Close the cover and slide the catch back into place.

Rack Components

Section 2-3

3G5A2-RPT01-PE 数据表(PDF) 42 Page - Omron Electronics LLC

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