Schneider Electric iEM3200 Manuale Utente
iEM3100 / iEM3200 / iEM3300 series user manual
Communications via Modbus RS-485
DOCA0005EN-04
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Chapter 5
Communications via Modbus RS-485
What is in this chapter?
This chapter contains the following sections:
Modbus communication overview
Modbus RTU protocol is available on the iEM3150, iEM3155, iEM3250, iEM3255, iEM3350 and
iEM3355.
iEM3355.
The information in this section assumes that you have an advanced understanding of Modbus
communications, your communications network and the power system that your meter is connected
to.
communications, your communications network and the power system that your meter is connected
to.
There are three different ways of using Modbus communication:
•
•
•
Modbus communications settings
Before communicating with the device using Modbus protocol, use the display to configure the
following settings:
following settings:
Communications LED indicator for Modbus devices
The yellow communications LED indicates the status of communication between the meter and the
master as follows:
master as follows:
Related topics
•
For more information on the Modbus protocol, see the Modbus organization website at
www.modbus.org.
www.modbus.org.
•
Settings
Possible values
Baud rate
9600 Baud
19 200 Baud
38 400 Baud
19 200 Baud
38 400 Baud
Parity
Odd
Even
None
NOTE: number of stop bits = 1
Even
None
NOTE: number of stop bits = 1
Address
1–247
If...
Then...
The LED is flashing
Communication with the device has been established.
NOTE: If there is an error online, the LED also flashes.
NOTE: If there is an error online, the LED also flashes.
The LED is off
There is no active communication between the master and the slave