GE IC697CPM790 PLC CPUs

GE IC697CPM790 PLC CPUs

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 support storage of user program in the flash memory). This allows updates of the firmware without disassembling the module or replacing EPROMs. The operating 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 40
C (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.

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 simplex 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

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.