GE PACSystems* RX3i IC695CPU315 Central Processing Unit

GE PACSystems* RX3i  IC695CPU315 Central Processing Unit

The RX3i CPU can be used to perform real time control  of machines, processes, and material handling systems.  The CPU communicates with the programmer and HMI  devices via a serial port using SNP Slave protocol. It  communicates with I/O and smart option modules over a  dual backplane bus that provides:

■ High-speed PCI backplane for fast throughput of  new advanced I/O.  

■ Serial backplane for easy migration of existing  Series 900F * -30 I/O.

Features

■ Contains 20 Mbytes of battery-backed user memory  and 20 Mbytes of non-volatile flash user memory.  

■ Provides access to bulk memory via reference  table %W.  

■ Configurable data and program memory.  

■ Programming in Ladder Diagram, Structured Text,  Function Block Diagram, and C.  

■ Supports auto-located Symbolic Variables that can  use any amount of user memory.  

■ Reference table sizes include 32Kbits for discrete  %I and %Q and up to 32K words each for analog  %AI and %AQ.  

■ Supports most Series 90-30 modules and  expansion racks. For a list of supported I/O,  Communications, Motion, and Intelligent modules,  see the PACSystems RX3i System Manual, GFK-2314.  

■ Supports up to 512 program blocks. Maximum size  for a block is 128KB.  

■ In-system upgradeable firmware.  

■ Two serial ports: an RS-485 serial port and an  RS-232 serial port.  

■ Ethernet communications via the rack-based  Ethernet Interface module (IC695ETM001). For  details on Ethernet capabilities, refer to TCP/IP  Ethernet Communications for PACSystems User’s  Manual, GFK-2224.

New Features and Enhancements in this Release

Improvements to Modbus RTU Slave protocol – To help resolve issues with the use of radio modems in conjunction  with Modbus RTU protocol, several improvements have been made to the implementation of the protocol in the PACs  firmware. These include:

ƒ Ability to filter noise data that may precede or follow a valid request.  

ƒ COMMREQ support for adjusting the end-of-frame timeout, to compensate for transmission gaps inserted by  packetizing modems.  

ƒ COMMREQ support for adjusting the receive-to-transmit delay

Installation in Hazardous Locations

The following information is for products bearing the UL marking for Hazardous Locations:

„ WARNING - EXPLOSION HAZARD - SUBSTITUTION OF COMPONENTS MAY IMPAIR SUITABILITY FOR CLASS  I, DIVISION 2;  

„ WARNING - EXPLOSION HAZARD - WHEN IN HAZARDOUS LOCATIONS, TURN OFF POWER BEFORE  REPLACING OR WIRING MODULES; AND  

„ WARNING - EXPLOSION HAZARD - DO NOT CONNECT OR DISCONNECT EQUIPMENT UNLESS POWER HAS  BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NONHAZARDOUS.  

„ EQUIPMENT LABELED WITH REFERENCE TO CLASS I, GROUPS A, B, C & D, DIV. 2 HAZARDOUS  LOCATIONS IS SUITABLE FOR USE IN CLASS I, DIVISION 2, GROUPS A, B, C, D OR NON-HAZARDOUS  LOCATIONS ONLY  

„ The tightening torque range for the control terminals is 9.6-11.5 in. lb. Use only wire rated for 90°C. Be sure to  observe any additional ratings that are provided with the modules.