Apex Digital MASS FLOW METER, Руководство по эксплуатации

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2020.07.24 • REV. 2 • MASS FLOW METER OPERATING MANUAL
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Serial Communication
Connecting your flow meter to a computer allows you to log the data that it
generates. The flow meter communicates digitally through its communications
connector using a real or virtual COM port on your computer. This section of
the manual shows you how to operate the flow meter using ASCII commands.
Establishing Communication
After connecting your flow meter using a communications cable, you will
need to establish serial communications through a real or virtual COM
port on your computer or programmable logic computer (PLC).
• If you have connected your device to a serial port, note its COM
port number. This can be found in Windows Device Manager.
• If you have used a USB cable to connect your device to your computer,
in most cases the computer will recognize your device as a virtual COM
port. If it does not, download the appropriate USB device driver and
note the COM port number as found in Windows Device Manager.
Drivers may be found at https://www.ftdichip.com/Drivers/D2XX.htm .
• The meter will be configured with the following settings:
• Baud: 19200 (default; others
can be used if the computer,
its software and the meter
are set for the same rate)
• Data bits: 8
• Parity: none
• Stop bits: 1
• Flow control: none
Communication Programs
Although the meter will communicate with any compatible terminal program
over RS-232, here are two common programs: PuTTy and HyperTerminal®.
Configuring HyperTerminal®
1. Open your Windows HyperTerminal® program (under
“Accessories” menu on Microsoft Windows® operating systems).
2. Select “Properties” from the file menu.
3. Click on the “Configure” button under the “Connect To” tab.
Be sure the program is set to match the settings above.
4. Under “Settings”, set Terminal Emulation to ANSI or Auto Detect.
5. Click on “ASCII Setup” and verify that “Send Line Ends with Line
Feeds” box is not checked, and “Echo Typed Characters Locally”
box and “Append Line Feeds to Incoming Lines” boxes are
checked. Other settings are normally OK in the default position.
6. Save the settings, close HyperTerminal® and reopen it.