GE PLC CPUs IC697CPX928 Central Processing Unit Installation

User RAM Memory

The CPX928 has a built-in memory board with 6

Mbytes of battery-backed CMOS RAM memory for

user data (program, configuration, and register data)

storage.

User Flash Memory

The CPX928 has 256K of built-in, non-volatile flash

memory for user data (program, configuraton, and

register data) storage.  Use of this flash memory is

optional.

Firmware Storage in Flash Memory

This CPU uses flash memory for storing the operating

system firmware.  This allows firmware to be updated

without disassembling the module or replacing

EPROMs.  The operating system firmware is updated

by connecting a PC compatible computer to the mod

ule's serial port and running the software included

with the firmware upgrade kit.

Operation, Protection, and Module Status

Operation of this module can be controlled by the

three-position RUN/STOP switch or remotely by an

attached programmer and programming software.

Program and configuration data can be locked

through software passwords or manually by the

memory protect keyswitch.  When the key is in the

protected position, program and configuration data can

only be changed by a programmer connected parallel

only (to the Bus Transmitter module).  The status of a

CPU is indicated by the seven green LEDs on the

front of the module.

Operating Temperature

The CPX 928 requires forced air cooling for proper

operation in ambient temperatures greater than 50C

(122 F).  A fan capable of 70 CFM (including filters)

should be located beneath slot 1 of the rack containing

the CPU.

Fan assemblies (IC697ACC 721. IC697ACC724. and

IC697ACC744) can be ordered for direct mounting on

the IC697 rack.  Refer to the applicable Programmable

Controller Installation Manual for detailed information.

Installation

It is the responsibility of the OEM, system integrator,

or end user to properly install the PLC equipment for

safe and reliable operation.  Product manuals provide

detailed information about installation, startup, and

proper use of the PLC equipment.  The installation

manual, shipped with your PLC programming

software, describes how to properly install the

equipment.

If the PLC installation must comply with supported

standards, such as FCC or CE Directives, please refer

to the Installation Requirements for Conformance to

Standards, shipped with the PLC programming

software, for additional guidelines.

Installation should not be attempted without refer

ring to the applicable Programmable Controller Installa

tion Manual.

Connect the battery to either of the battery connec

tors on the module (see Figure 2).

Put the toggle switch in the STOP position.

Put the keyswitch in the Memory Protection OFF posi

tion.

Make sure that rack power is off.

Install the CPX 928 module in slot 1 of rack 0 (see

Figure 1).

Turn on power