Category: GE

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 position.

•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.

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.

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.

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.

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.

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.

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.

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.

Functions

The CPM 790 is a single slot programmable controller

CPU which allows floating point calculations.  The CPM

790 is programmed and configured with MS-DOS or

Windows based programming software for use in

Emergency Shut-Down (ESD), fire and gas, and other

critical control applications.  It communicates with I/O

and smart option modules over the rack mounted

backplane (IC697CHS750. 782. 783. 790. 791) by way of

the VME C.1 Standard format.

The CPM 790 must be used in conjunction with a

Standalone C program which provides Triple Modular

Redundancy (TMR) operating and autotest routines.  It

will not operate unless this program is included in the

loaded application program.

For detailed information on TMR systems, see

Reference 4. the IC66* Modular Redundancy Flexible

Triple Modular Redundant (TMR) System User’s Manual.

Supported option modules include IC697 LAN Interface

modules, Programmable Coprocessor, Alphanumeric

Display Coprocessor,  Bus Controller for IC660/661 I/O

products, Communications modules, I/O Link Interface,

and all of the IC697 family of discrete and analog I/O

modules.

Features

•Single slot CPU

•Provides 1 Mbyte of battery-backed memory in the

same slot (up to 512 Kbytes available for use by

ladder diagram application program)

•Supports floating point calculations

•Up to 12K discrete inputs and outputs (any mix

simplex mode only); 2048 voted discrete inputs, 2048

voted discrete outputs

•Up to 8K analog inputs (simplex mode only) and

8K analog outputs (simplex mode only); 1024 voted

analog inputs

•0.4 microseconds per boolean function

•64 MHz, 80486DX2 microprocessor

•Supports IC660/IC661 I/O (and IC697 I/O in sim

plex mode only)

•Programmed by MS-DOS , or Windows software

products running on Windows 95 or Windows

NT over Ethernet TCP/IP or through the SNP port.

•Configurable data and program memory

•Battery-backed calendar clock

•Three position operation mode switch

•Password controlled access

•Remote programmer keyswitch memory protection

•Four status LEDs

•Software configuration (No DIP switches

or jumpers)

•Reference information inside front door

•In-system upgradable firmware

Batteries

A lithium battery (IC697ACC701) is installed as shown

in Figure 2.  This battery maintains program and data

memory when power is removed and operates the

calendar clock.  Be sure to install the new battery be

fore removing the old battery.  If during power-up

diagnostics a low battery is detected the Module OK

LED (top) will not stay on.  Specific indication of a low

battery state is detailed in Reference 2.

Removing a Module

The following instructions should be followed when

removing a module from its slot in a rack.

Grasp the board firmly at the top and bottom of

the board cover with your thumbs on the front of

the cover and your fingers on the plastic clips on

the back of the cover.

Squeeze the rack clips on the back of the cover

with your fingers to disengage the clip from the

rack rail and pull the board firmly to remove it

from the backplane connector.

Slide the board along the card guide and remove it

from the rack.

Configuration

The IC697 CPU and I/O system is configured with

MS-DOS or Windows based programming software.

There are no DIP switches or jumpers used to config

ure the system. The CPU verifies the actual module

and rack configuration at power-up and periodically

during operation. The actual configuration must be

the same as the programmed configuration.  Devi

ations are reported to the CPU alarm processor func

tion for configured fault response.  Consult Reference

1 for a description of configuration functions.

Batteries

A lithium battery (IC697ACC701) is installed as shown

in Figure 2.  This battery maintains program and data

memory when power is removed and operates the

calendar clock.  Be sure to install the new battery be

fore removing the old battery.  If during power-up

diagnostics a low battery is detected the Module OK

LED (top) will not stay on.  Specific indication of a low

battery state is detailed in Reference 2.

Programmer Connection, Ethernet TCP/IP

Connecting your programmer via an Ethernet

TCP/IP network requires installation of an Ethernet

Interface module in the PLC.  This can be either the

Ethernet Controller, IC697CMM741. or Ethernet

Interface (Type 2), IC697CMM742.  Before connecting

your programmer and PLC to the Ethernet TCP/IP

network you must set the IP address in the Ethernet

Interface.  After setting the IP address, connect the

PLC and the programmer running Windows software

to the Ethernet Interface.  For more detailed

information on the programmer connection via

Ethernet TCP/IP, refer to the TCP/IP Ethernet

Communications (Type 2) User’s Manual, and the

Windows programming manual, GFK-1295.

The CPU verifies the actual module

and rack configuration at power-up and periodically

during operation. The actual configuration must be

the same as the programmed configuration.  Devi

ations are reported to the CPU alarm processor func

tion for configured fault response.  Consult Reference

1 for a description of configuration functions.