GE PACSystems* RX3i IC695NIU001 PLUS Ethernet Network Interface Unit

GE PACSystems* RX3i IC695NIU001 PLUS Ethernet Network Interface Unit

DESCRIPTION

The PACSystems* RX3i Ethernet NIU PLUS, IC695NIU001, makes it possible to use PACSystems RX3i  and Series 90-30 I/O remotely on an Ethernet network.  Once set up by configuration, data exchange is completely  automatic. System control can be provided by any master  device capable of exchanging Ethernet Global Data  (EGD). The Ethernet NIU automatically provides the  controller with status information in each exchange. The  application program logic in the controller can monitor this  status data, and issue appropriate commands to the  Ethernet NIU.

An RX3i Ethernet NIU station consists of:

▪ an RX3i Universal Backplane (IC695CHS0xx) 

▪ an RX3i power supply (IC695PSxxxx) 

▪ the RX3i Ethernet NIU (IC695NIU001) 

▪ one or more RX3i Ethernet modules (IC695ETM001) 

▪ proprietary application software 

▪ optional Series 90-30 expansion backplanes.  

▪ PACSystems RX3i and/or Series 90-30 modules, as  appropriate for the application.

Ethernet NIU001 PLUS Features

▪ 20Kbytes of optional local logic. Supports all  languages except C programming. 

▪ 10 Mbytes of built-in flash memory for local user data  storage.  

▪ Battery-backed Real Time Clock. 

▪ In-system upgradeable firmware. 

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

▪ Supports Ethernet communications via the backplanebased Ethernet Interface module (IC695ETM001) 

▪ Data exchange using EGD 

▪ TCP/IP communication services using SRTP 

▪ Comprehensive station management/diagnostic tools 

▪ Supports operation with redundant controllers

Ethernet Global Data Features

The Ethernet NIU communicates with its controller via  EGD exchanges. One exchange is used to send outputs  to the ENIU and another exchange is used to send inputs  back to the controller. The ENIU supports receiving  outputs from redundant controllers. By sending the EGD  exchange to a group address both controllers can receive  the inputs. Up to 1300 bytes of outputs can be sent to a  set of ENIUs from a controller. Each ENIU can send up to  1300 bytes of inputs to the controller.

A typical system might consist of a controller with five  ENIUs. The controller sends 1300 bytes of outputs and  each ENIU sends 100 bytes of inputs to the controller.  This typical system would have its I/O updates occur in  less than 25 milliseconds. If the controller scan time is  greater than 25 milliseconds, the update occurs at the  controller’s scan rate. This performance timing is a  guideline, not a guarantee, and assumes that there is no  other traffic on the Ethernet link to the I/O. Performance  data for other system configurations can be found in the  Ethernet NIU User’s Manual, GFK-2439.

Ethernet NIU COMMREQ Support

The Ethernet NIU supports COMMREQs that are sent to it by  a C block application in a PACSystems RX7i or RX3i  controller. This feature is not available with other types of  controllers. Ladder code in the RX7i or RX3i CPU interfaces  to the C block. The C block sends COMMREQ commands to  the Ethernet NIU in an Ethernet Global Data Exchange. The  Ethernet NIU executes the COMMREQ and sends the results  back to the RX7i or RX3i using another EGD exchange. For  more information, see the PACSystems RX3i Ethernet NIU  User’s Manual, GFK-2439.