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Instruction manual
FLOW-BUS interface
for digital
Mass Flow / Pressure instruments
D o c . n o . : 9 . 1 7 . 0 2 4 K
D a t e : 2 6 - 0 2 - 2 0 1 0
ATTENTION
Please read this instruction manual carefully before installing and operating the instrument.
Not following the guidelines could result in personal injury and/or damage to the equipment.
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Summary of Contents for BRONKHORST FLOW-BUS
- Page 1 Instruction manual FLOW-BUS interface for digital Mass Flow / Pressure instruments D o c . n o . : 9 . 1 7 . 0 2 4 K D a t e : 2 6 - 0 2 - 2 0 1 0 ATTENTION Please read this instruction manual carefully before installing and operating the instrument.
- Page 2 BRONKHORST HIGH-TECH B.V. SCOPE OF THIS MANUAL This manual covers the interface part of digital massflow / pressure instruments for gases and / or liquids. It describes the communication between the instrument and the operator according to the specific (fieldbus) protocol.
- Page 3 BRONKHORST HIGH-TECH B.V. Short form start-up Procedure: Connect instrument to the bus patchcable cable RJ45 to M12 beginterminator endterminator beginterminator 7.03.297 7.03.298 7.03.297 Y-adapter Y-adapter Y-adapter 7.03.241 7.03.241 7.03.241 Y-adapter 7.03.319 endterminator 7.03.321 patchcable patchcable patchcable patchcable endterminator beginterminator 7.03.298 7.03.297...
- Page 4 BRONKHORST HIGH-TECH B.V. power isolator 1.09.239 patchcable patchcable patchcable patchcable patchcable patchcable patchcable patchcable patchcable beginterminator 7.03.297 Y-adapter 7.03.241 Y-adapter Y-adapter Y-adapter Y-adapter Y-adapter 7.03.241 7.03.241 7.03.241 7.03.241 7.03.241 endterminator 7.03.298 Y-adapter Y-adapter Y-adapter Y-adapter 7.03.241 7.03.241 7.03.241 7.03.241 cable RJ45 to M12...
- Page 5 7.03.319 The last instrument on the bus needs a bus-end-termination connector (black). The first module on the bus (either an E-7000 module for digital instruments or a FLOW-BUS interface module to a PC) needs a bus begin – terminator (red).
- Page 6 If the red LED is blinking slowly, the FLOW-BUS address is already occupied. In that case: press the micro push-button and release it after 2 seconds. Now the instrument is operational on the bus (pressing the push- button for 1 to 4 seconds will activate the auto install function, the instrument will install itself to a free node- address).
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Page 7: Table Of Contents
Install to bus via rotary switches on the side of the instrument (if present)..........12 Security and flexibility............................13 FLOW-BUS system operation with computer......................14 Communication with FLOW-BUS DDE server ....................14 Communication with FLOW-BUS directly through DLL ..................14 Communication with interface directly through RS232 ..................14 FLOW-BUS connector..............................15 TROUBLESHOOTING..............................16 9.17.024... -
Page 8: Changing Parameters Via Flow-Bus
However, when changing of parameter settings via other (self-made) software running on computers using RS232 and/or FLOW-BUS DLL and/or FLOWDDE is wanted, for safety reasons setting of special initialisation parameters is needed first. -
Page 9: Flow-Bus
2.2 Technical information FLOW-BUS systems may have a minimum of 2 and a maximum of 126 connections. The maximum length for datalines between the first and the last connection may be up to approx. 600 meters. Longer distances are only possible in combination with special bus-repeater modules. -
Page 10: Cables
BRONKHORST HIGH-TECH B.V. 2.3 Cables For connecting instruments to the FLOW-BUS you need shielded cables with at least 3 wires (for data only). Recommended are twisted wire cables for RS485-communications with 100 or 120 Ohm impedance. All Bronkhorst High-Tech FLOW-BUS cables have also integrated power-supply wires. -
Page 11: Power Supply
2.6.2 Remote installation to FLOW-BUS Some FLOW-BUS modules have to be installed on the bus by means of another FLOW-BUS module or a (personal) computer. This can be done as follows: - By means of the micro-switch on the instrument. See instruction manual 9.17.023. -
Page 12: Install To Bus On A Pre-Defined Node-Address Or Re-Address Instrument On The Bus
Note 1: Because it is not allowed in a FLOW-BUS system to have 2 devices on the same node-address, at (re)start of the instrument there will also be a check performed if its node-address (in memory) is already occupied by another device. -
Page 13: Security And Flexibility
If the specified address differs from the value stored in the instrument, the new address is saved in memory. If the switches specify an invalid FLOW-BUS address, i.e. a value of 1 or 2, the value stored in the instrument’s memory will be used as the address. -
Page 14: Flow-Bus System Operation With Computer
FLOW-BUS system operation with computer There are several options to do this. First see that the chosen hardware is able to communicate with the FLOW-BUS system and that this can be done with a sufficient velocity of parameter transfer for your application. -
Page 15: Flow-Bus Connector
BRONKHORST HIGH-TECH B.V. FLOW-BUS connector The shielded RJ45 modular jack connector (for non IP65 applications) has the following pin configuration: Pinnumber Description + 15 Vdc/+ 24 Vdc supply Shield + 15 Vdc/+ 24 Vdc supply RS485 – B RS485 – A... -
Page 16: Troubleshooting
BRONKHORST HIGH-TECH B.V. TROUBLESHOOTING Symptom Possible cause Action No output signal on FLOW-BUS Bad communication with FLOW-BUS Check communication e.g. with interface local readout module or PC-test program No or slow response to setpoint Slope value could be set too high...
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