Satec Expertmeter EM720 Operation Manual page 25

Chapter 2 Operating the EM720
Serial Communications
Ethernet Connection
EM720 Power Quality and Revenue Meter
The IR port is identified in the EM720 as port COM1. It is
factory preset to 19200 bps, 8-bits/No-parity data format,
and is pre-programmed for the IEC 62056-21 protocol.
You can change the default baud rate or protocol for the
IR port from the front display or via PAS (see
Serial Communication Ports
Most of the replaceable communication modules you can
order with your EM720 have an additional RS-232/RS-485
serial port. It is easily configurable for either RS-232, or
RS-485 serial communications. See the EM720 Installation
Manual for the serial port wiring.
An RS-232/RS-485 serial port is identified in the EM720 as
port COM3. If you installed communication modules with
more than one serial port, only the port located in the left-
hand slot will be enabled.
The COM3 port is provided with two green RX and TX LEDs
that blink when the port receives or transmits data.
The port is factory preset to 19200 bps, 8-bits/No-parity
data format, and is pre-programmed for the Modbus RTU
protocol. See Setting Up Serial Communication Ports
how to change the factory-set options for your serial port.
You can check the present serial port settings in your
meter via the Device Info display (see
in Chapter 3).
An optional 10/100Base-T Ethernet/USB module provides
a direct connection of the EM720 to the Ethernet.
Communicating with the EM720
Setting Up
in Chapter 5).
Device Info Display
on
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