Series 90-70 Genius Bus Controller IC687BEM731, GFK
Contents
1. device and the next device Connect the Serial 2 terminal of each device to the Serial 2 terminals of the previous device and the next device Shield In of each device must be connected to Shield Out of the preceding device For the first device on the bus Shield In can be left unconnected For the last device on the bus Shield Out can be left unconnected Terminating Resistor Serial 1 Serial 2 Serial 2 Shield In Shield Out Ordering Information Shield In Shield Out Series 90 70 Genius Bus Controller VME Width IC687BEM731 Blank slot filler VME width IC698ACC7352. until it clicks onto the rack rails Be sure that the board has seated properly in the connector Tighten screws at the top and bottom to hold the module in place 5 Complete the bus connections After the installation is completed and power is applied the Bus Controller start up and blink the top LED for about 5 seconds When the diagnostics have completed successfully the top LED stays ON The middle LED lights when a valid configuration for the module has been received from the CPU and the bus operation has been verified The bottom LED is OFF under all conditions Removing the Bus Controller 1 Power down the rack in which the Bus Controller is located Before removing power it is important to consider the impact on the controlled process 2 Ifthe PLC is not part of a redundant system the bus wiring can be removed from the Bus Controller If the PLC is part of a redundant system and another CPU on the bus is now functioning as the controller the Bus Controller can be removed without powering down the bus Do not disconnect the bus cable or any terminating resistor from the Bus Controller s bus connector Remove the connector from the Bus Controller very carefully Avoid contact with exposed cable wiring Place the terminal assembly with the bus wiring still attached in a protected location Caution If exposed wiring comes in contact with conductive material data on the bus may be corrupted possibly causing the syst
3. Series 9O 70 IC687BEM731 GFK 2370 Genius Bus Controller March 2010 The I C687BEM731 Genius Bus Controller interfaces a Genius communications bus with up to 31 additional devices to a Series 90 70 or PACSystems RX7i system It can be installed in slots 2 through 17 ina PACSystems RX7i PLC or slots 2 through 9 in a Series 90 70 system The Bus Controller occupies only a single slot in a VME type or standard width PLC backplane If it is used in a standard Series 90 70 PLC rack there will be a 0 8 inch space between the Bus Controller and the module to its right The Genius bus may serve Individual Genius I O Blocks Other PLCs such as RX7i Series 90 70 Series 90 30 and VersaMax Series Six and Series Five Series 90 70 Remote Drops A remote drop is a Series 90 70 rack that is interfaced to the bus by a Remote I O Scanner module VersaMax and Field Control I O Stations This Bus Controller is compatible with the VersaMax Genius NIU Multiple hosts for communications using datagrams and Global Data ries 90 70 PLC PC with PCI f i ith Genius Bus based Controller PACSystems PCIM Board C687BEM731 RX7i with Hitt Genius Bus illl Controller IC687BEM731 Genius I O Blocks i H ss ss a vill VersaMax I O Station with Series 90 30 PLC PACSystems RX3i Series 90 70 I O Station with Genius Network Interface Unit with Genius Bus Controller with Genius Bus Controll
4. d from the CPU In the event of a sit bus failure such as a broken wire or excessive bus errors the Channel1 OK LED remains OFF until the failure condition is corrected If the Bus Controller fails the LED will remain permanently OFF MODULE OK Hand Held Monitor Connector The nine pin connector directly below the LEDs is used for a Genius Hand held Monitor GENUS BUS Serial Bus Connector Connections to the serial bus are made to the removable bottom connector 1 CHANNEL Specifications Devices on the bus 32 devices at 153 6 Kbaud standard 153 6 Kbaud extended or 76 8 Kbaud 16 devices at 38 4 Kbaud Module Current 1 3 Amps from the backplane 5V supply Requirement Communications Configurable 153 6 Kbaud extended 153 5 Kbaud standard 6 8 Kbaud Rates 38 4 Kbaud Maximum Bus Length 7500 feet at 38 4 Kbaud 4500 feet at 76 8 Kbaud 3500 feet at 153 6 Kbaud extended 2000 feet at 153 6 Kbaud standard Maximum length at each baud rate also depends on cable type The Genius System and Communciations Manual provides a complete list of cable types showing corresponding bus lengths and baud rates Greater bus lengths are possible using sections of fiber optics cable with modems CHANNEL 1 S SER1 S SER2 SHIELD S Rts S SHIELD OUT Bus Type Daisy chained bus cable single twisted pair plus shield or Twinax Fiber optics cable and modems can also be used eer Bus Termination 75 100 120 or 150
5. em to shut down 3 To remove the Bus Controller loosen any screws attaching it to the rack and then hold the top and bottom plastic tabs to disengage them from the rack rails Pull the board firmly to remove it from the backplane 5 Slide the board outward to remove it from the rack 3 GFK 2370C Configuration The Bus Controller and the devices on its bus must be configured as part of the PLC system using the Machine Edition Logic Developer 5 0 Service Pack 2 or later software The devices on the bus must also be configured separately This includes A Configuring I O blocks with a Hand held Monitor and or Write Configuration COMMREQs For a Series 90 70 or PACsystems RX7i PLC certain blocks can be configured directly from the programmer on an operating Genius bus B Configuring Remote Drops with the programming software C Configuring redundant Bus Controllers with the programming software Setting the Bus Controller Baud Rate The Genius network can be configured to operate at one of four speeds up to 153 6K baud The default baud rate of 153 6 Kbaud standard supports a bus up to 2 000 feet in length If the bus is longer than 2 000 feet a lower baud rate must be selected following the guidelines in the Genius System and Communications Manual The maximum length of a network depends on the baud rate and cable type it can be up to 7 500 feet Fiber optics cable with modems can be used for long distance
6. enius I O System User s Manual f the Bus Controller is located at the end of a bus install the appropriate resistor across its Serial 1 and Serial 2 terminals The amount of resistance required will depend upon the type of cable used for the bus Terminating the Bus at the Bus Controller Serial 1 Serial 2 MW Terminating Resistor Vp Serial 1 Genius Bus Controller GFK 2370C Connecting the Bus to the Bus Controller There will always be 2 bus wires or one bus wire and a resistor lead in each terminal Example specifications are 2 conductors with same cross 0 08 mm 0 5 mm section solid minimum maximum 2 conductors with same cross 0 08 mm 0 75 mm section flexible minimum maximum 2 conductors of the same cross 0 25 mm 0 34 mm section flexible ferrules without minimum maximum plastic sleeve 2 conductors of the same cross 0 5mm 0 5 mm section flexible TWIN ferrules minimum maximum with plastic sleeve 1 Using a small flathead screwdriver loosen thebus connector mounting screws and remove it from the Bus Controller 2 Complete the bus connections for the Bus Controller 3 Tighten the individual terminal screws to hold each pair of wires in place Maximum recommended torque is 0 22Nm Re insert the connector on the Bus Controller 5 Tighten the connector mounting screws Connect the Serial 1 terminal of each device to the Serial 1 terminals of the previous
7. er Remote I O Scanner Module A bus may be used entirely for I O control or it may feature I O control enhanced by communications commands in the program A bus may also be dedicated to CPU communications with multiple CPUs and no I O devices Communications can include transmitting Global Data from one CPU to another The Global Data area is identified in the configuration After initialization the specified data area is transferred between devices automatically and repetitively In addition messages called Datagrams can be transmitted in response to individual commands in the application program Datagrams can be directed to one device or broadcast to all devices on the bus Features Advanced I O Diagnostics Redundancy applications supported Datagrams and Global Data communications Hand Held Monitor Port Software configuration GENIUS BUS CONTROLLER 2 Genius Bus Controller GFK 2370C LEDs Bus Controller C687BEM731 has three LEDs During normal operation the top two LEDs are ON They are OFF or blinking to indicate special or failure conditions The third LED is not used Module OK The top LED indicates the status of the Bus Controller If powerup diagnostics detect a failure or if the module fails during operation this LED will be OFF The Module OK LED blinks during powerup diagnostics or when the Bus Controller is installed in the wrong slot Channel 1 OK This LED is ON after a valid configuration is receive
8. ohm resistor at both ends of electrical bus cable Data Encoding Each bit is encoded into three dipulses majority voted at the receiver to correct any single dipulse errors A dipulse is an AC code consisting of a positive then negative excursion of voltage Dipulses are individually sampled to reject low and high frequency interference ModulationTechnique Frequency Shift Keying FSK 0 to 460 8 KHz max 153 6 Kilobaud Isolation 2000 volts Hi Pot 1500 volts transient common mode rejection Signal noiseRatio 60 db Related Documents Series 90 70 Genius Bus Controller User s Manual GFK 2017 Genius Analog and Discrete Blocks Manual GEK 90486 2 Genius I O System and Communications Manual GEK 90486 1 Series 90 70 PLC Installation Manual GFK 0262 Series 90 70 Remote I O Scanner User s Manual The PACSystems RX7i Installation Manual GFK 2223 Proficy Machine Edition Logic Developer PLC Getting Started GFK 1918 Genius Bus Controller Installing the Bus Controller The Bus Controller can be installed at any position on the Genius bus Communications are most efficient if devices are placed in the same sequence as their configured Device Numbers The Bus Controller is usually device 31 1 Be sure the rack is powered down 2 Position the Bus Controller at its intended location 3 Push the Bus Controller into the card guide until it is aligned with the connector on the rack backplane 4 Push the module into the connector
9. requirements or if additional isolation is required Select the same baud rate for the Bus Controller as that used for other devices on the bus The bus will not operate unless all devices are set to the same baud rate The Bus Controller powers up with no assumed baud rate or serial bus address After a valid configuration has been stored to the system the PLC CPU transfers the new configured baud rate and serial bus address to the module at the conclusion of the store and each time the Bus Controller is power cycled Completing the Bus Connections For details of bus selection and installation refer to the Genius System and Communications User s Manual Using shielded twisted pair cable create a serial bus connecting the Bus Controller I O blocks and other permanently installed devices as shown below Caution All cable used for one serial bus must be of the same type or the bus will not work Other busses connected to the same CPU may use different types of cable Cable specifications are found in the Genius System and Communications Manual When making bus connections the maximum exposed length of bare wires should be two inches For added protection each shield drain wire should be insulated with spaghetti tubing to prevent the Shield In and Shield Out wires from touching each other Terminating the Bus Each physical end of a bus must be terminated with appropriate termination resistors as explained in the G
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