GE PACSystems* RX3i IC695CRU320-EW Redundancy CPU

GE PACSystems* RX3i IC695CRU320-EW Redundancy CPU

DESCRIPTION

The PACSystems* RX3i Redundancy 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 90*-30 I/O.

Features

▪ Hot standby (HSB) redundancy. Two redundant units  make up a redundancy system. Each unit requires one  Redundancy CPU (IC695CRU320) and a redundancy  Memory Xchange module (IC695RMX128/228) configured  as a redundancy link. 

▪ Contains 64 Mbytes of battery-backed user memory and  64 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. Refer to PACSystems RX7i  & RX3i CPU Programmer’s Reference Manual, GFK-2950. 

▪ 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, refer to the PACSystems  RX3i System Manual, GFK-2314F or later. 

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

▪ CPU firmware may be upgraded in the field. ▪ CPU supports firmware upgrades of modules in its  backplane. 

▪ 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 PACSystems RX7i & RX3i TCP/IP Ethernet Communications User Manual, GFK-2224. 

▪ Time Synchronization to SNTP Time Server on Ethernet  network when used with Ethernet Release 5.0 or later. 

▪ Compliant with EU RoHS Directive 2002/95/EC using the  following exemptions identified in the Annex: 7(a), 7(c)-I, &  7(c)-III.

Hot Standby CPU Redundancy Features

For details on the configuration and operation of a Hot Standby CPU redundancy system, refer to the PACSystems  Hot Standby CPU Redundancy User’s Manual, GFK-2308.

▪ Supports single and redundant Ethernet remote I/O LANs through Ethernet Network Interface Unit (ENIU)  modules 

▪ Supports simplex and redundantly controlled PROFINET remote IO (requires firmware version 8.00 or later) 

▪ Survives any one single point of failure 

▪ Bumpless switching o Synchronized CPUs o One scan switching o Transfer data size up to 2Mbytes; selected in CPU hardware configuration and in variable properties 

▪ Supports two redundancy communications links 

▪ Online repair of failed component 

▪ Online programming 

▪ Redundancy Memory Xchange Module o Manual toggle switch for role switching, which transitions control from the active unit to the backup unit o Redundancy status LEDs  

▪ Application-initiated role switching to switch the active unit to backup status 

▪ Redundancy status bits and message logging 

▪ Memory error checking and correction (ECC) single bit correcting and multiple bit checking 

▪ Background diagnostics    

HSB Control Strategy

The HSB control strategy has the following characteristics:

▪ Active unit does not automatically switch to primary on resynchronization 

▪ Critical control data plus all redundant outputs must be included in the output data transfer 

▪ Bumpless switchover from active unit to backup unit