GE IC697MEM713 CMOS Expansion Memory

Features

Available in 64. 128. 256 and 512 Kbytes

For expansion of CPU 771. CPU 772. or PCM

Memory retained by battery on CPU or PCM

Does not require additional slot

Configurable for data and program storage

Error checking by CPU checksum routine

No tools required for installation

Field Installable

Functions

This CMOS Expansion Memory is available in four

versions; 64. 128. 256 and 512 Kbytes. This memory

may be used to expand logic and data memory in ei

ther the CPU 771 (IC697CPU771) and CPU 772

(IC697CPU772) modules, or the Programmable Co

processor Module (IC697PCM711).  It is installed as a

daughter board and resides in the same slot as the

module it serves.  Memory on this board supplements

memory available on the base board.

CMOS Expansion Memory

Memory is retained in the event of power loss by the

battery on the base board housing.

Logic program memory is continually error-checked

by the PLC CPU as a background task.

The PCM error checks storage memory when power

is  cycled and on hard or soft resets.

Installation

Installation should not be attempted without refer

ring to the applicable Programmable Controller

Installation Manual (See reference 4).

Make sure rack power is off.

Plug the 64 pin connector into the connector on

the base board, and engage snaps.

Place module in rack.

Turn power on.

CPU Installation:

Clear memory using either MS-DOS or

Windows programming software following

instructions in the Programming Software User's

Manual (See reference 1).

PCM Installation:

For the PCM follow the instructions in the Pro

grammable Coprocessor Module Support Software

User's Manual (See reference 3).

Batteries

The Lithium battery (IC697ACC701) is installed as

shown in figure 1.  This battery maintains user

memory when power is removed and operates the

calendar clock on the PLC CPU.  Be sure to install the

new battery before removing the old battery.  Specific

indication of a low battery state is detailed in References 3 and 4.