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Serial Communications
Connecting your ow meter to a computer allows you to log the data
that it generates. The ow meter communicates digitally through its
communications connector and cable using a real or virtual COM port on your
PC. This section of the manual shows you how to operate the ow meter using
ASCII commands.
Establishing Serial Communications
After connecting your ow controller using a communications cable, you will
need to establish serial communications through a real or virtual COM port on
your computer or PLC.
• Conrm that your mass ow controller is ready to accept new setpoints
serially by selecting MENU > CONTROL > ADV CONTROL > SETPT SOURCE. The setpoint
source should be set to Serial/Front Panel.
• If you have connected your deviceto 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, the
computer in most cases will recognize your Alicat as a virtual COM port. If it
does not, download the appropriateUSB device driver at alicat.com/drivers
and note the COM port number as found inWindows Device Manager.
Serial Terminal Application
Alicat's Serial Terminal is a precongured program for serial communications
that functions much like the older HyperTerminal program of Windows.
Download Serial Terminal for free at alicat.com/drivers. Once downloaded,
simply run SerialTerminal.exe. Enter the COM port number to which your
device is connected and the baud rate of the ow controller. The default baud
rate is 19200, but this is adjustable by entering the SERIAL COMM menu on your
ow meter: MENU > ADV SETUP > COMM SETUP > BAUD (page 38)
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