GE IC697CPM790 64 MHz, 32-Bit Floating Point Central Processing Unit Installation

User Memory

Program and data memory for the CPM 790 is provided

by a memory board with 1 Mbyte of battery-backed

CMOS RAM.  512 Kbytes of this memory is available for the

user's application program and data.  This memory board is

an integral part of the CPM 790 module and is included

with the module.

Flash Memory

This module uses flash memory for storage of the

operating system firmware (this module does not sup

port storage of user program in the flash memory).  This

allows updates of the firmware without disassem

bling the module or replacing EPROMs.  The oper

ating system firmware is updated by connecting a

PC compatible computer to the module's serial port

and running the Loader software included with the

firmware floppy disk.

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 four green LEDs on the front

of the module.

Operating Temperature

The CPM 790 requires forced air cooling for proper

operation in ambient temperatures greater than 40C

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

should be located beneath slot 1 of the rack containing

the CPU.

Fan assemblies (IC697ACC721. 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 CPM 790 module in slot 1 of rack 0.

•Turn on power.

The module should power up and the top LED should

blink.  When the diagnostics have completed

successfully, the top LED stays on and the second and

third LEDs are off.  The fourth LED is off if the

keyswitch is in the OFF position.  The CPU is now

ready to be programmed (if connected parallel, the CPU

can be programmed regardless of key position).   After

the program has been verified the toggle switch can be

moved to the appropriate operation mode position.

The LEDs indicate the position of the toggle switch,

memory protection status, and the state of the program.