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Automation Totalflow Measurement & Control Systems Totalflow Low Power and Protocols

Automation Totalflow Measurement & Control Systems Totalflow Low Power and Protocols. TOTALFLOW. AA. TOTALFLOW. AA. Communications Experience. Multiple Address Radio Spread Spectrum Radio Cellular Phone Systems (including CDPD) Microwave Phone Modems Satellite Systems Hardwire

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Automation Totalflow Measurement & Control Systems Totalflow Low Power and Protocols

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  1. Automation Totalflow Measurement & Control Systems Totalflow Low Power and Protocols

  2. TOTALFLOW AA TOTALFLOW AA Communications Experience • Multiple Address Radio • Spread Spectrum Radio • Cellular Phone Systems(including CDPD) • Microwave • Phone Modems • Satellite Systems • Hardwire • RS-232 • RS-485 • RS-422

  3. Protocols • Totalflow Low Power • Totalflow Low Power Packet Protocol • Totalflow Modbus • Totalflow Modbus (low power) • Enron Modbus • Transco Modbus • Square-D • Terbus • Level Master • Will Quote Custom

  4. Flow Computer Timing 1200 Baud FCU TIMING 4 seconds FCU LISTEN CYCLE = 4 SECONDS 400 m secs. 2 seconds FCU LISTEN CYCLE = 2 SECONDS 400 m secs. 1 second FCU LISTEN CYCLE = 1 SECOND 400 m secs.

  5. Flow Computer Listen Cycle -VS- Baud Rate 225 m SEC. 4 SECOND LISTEN TIME AT 2400 BAUD 138 m SEC. 4 SECOND LISTEN TIME AT 4800 BAUD 94 m SEC. 4 SECOND LISTEN TIME AT 9600 BAUD

  6. Standard Protocol FCU AND CCU TIMING 4 Seconds FCU Listen Cycle = 4 Seconds 400 msec. 4-5 Seconds CCU Transmission Time

  7. Packet Protocol • Allows packetizing of data, so remote and host communications can be more efficient in dealing with bad portions of a data transmission especially using radios • Similar to other file transfer protocols

  8. Packet Protocol Overview • FCU transmit packet can be 1,2 or 4 Kbytes determined by WinCCU • FCU internal data blocks can be 128,256,512 or 1024 bytes determined by host software Data Block within packet Transmit Packet

  9. Example of Packet Protocol Transmission Host sends request frame (Can ask for multiple records in one request) Remote reads the request from host Remote builds response packet(s) and sends first one Host will either ACK the transmission, NACK and request entire packet be sent again or NACK and specify bad data blocks within packet Remote will either send next packet, re-transmit bad packets from previoustransmission or if complete, return tonormal processing

  10. Modbus Protocol • Master/Slave protocol, using AAI’s implementation of Gould’s Modbus • RTU (binary) or ASCII available • Register map grouping based on data type (example) • 110-172 = User configurable register group • 1001-1047 = Boolean register group

  11. Modbus Continued • 7001-7154 = Floating point register group • 11001-11970 = Log period register group • 12001-12200 = Event Records • 10001-10050 = Daily record register group • Starting group addresses can bechanged by the user • All FCU data is accessible

  12. Communication Systems Typical VHF, UHF or MAS System Modem Communication Base or Repeater Tower Cellular Remote Sites Some systems require a mix of remote devices

  13. Examples Using Multiple Protocols in a System Using Modbus to retrieve historical, alarms and status information Com.# 1 Radio Com Port #1 Com.# 2 One Com. Port using Totalflow Protocol and second using Totalflow Modbus Com Port #2 Hardwire into Plant for operational information Advantage: Allows two different host packages to retrieve information from remote device

  14. Solar Insolation Map

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