Chapter 4 Using PAS Software
Setting up Communications
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EM720 Power Quality and Revenue Meter
“Sites” directory. Type a site name for your device in
the “File name” box, click New, and then click OK.
4. On the Instrument Setup tab, select “EM720” in the
“Model” box. PAS automatically selects the appropriate
instrument options for your meter.
5. Select a correct CT secondary current (5A or 1A) for
your meter.
6. If you wish to add any comments for your meter, type
them into the “Comment” box.
Setting up Communications
You can communicate with your meters via a PC RS-232
serial port, through the Internet, via either a local Ethernet,
or a wireless GPRS Dial-Up connection, and via the USB port.
To configure your communications with the EM720:
1. Select Configuration from the Tools menu. Under the
Communication group on the Instrument Setup tab,
select the type of connection for your device.
2. Set the device communication address you assigned to
the EM720 port. When communicating via the Ethernet
or a GPRS modem, the EM720 responds to any
address you select.
3. In the “Sampling Rate” box, select a rate at which PAS
updates data on your screen when you continuously
poll the device in the PAS Data Monitor.
The communication protocol and port settings must match
the settings you made in your meter.
Communicating through a Serial Port
Select Serial Port/Modem Site on the Configuration tab, and
then click on the Connection tab to configure your serial port
settings.
Configuring a Serial Port
1. On the Connection tab, select a COM port from the
“Device” box, and then click Configure.
2. Specify the baud rate and data format for the port.
Choose the same baud rate and data format as you
have set in the meter, and then click OK.
