Nexus 1252 - Advanced Meter Configuration; Serial Port Configuration Details; Network and Modem Configuration; Notes on Communication Settings

Doc# E107754 V.1.03 QS - 7
Nexus® 1252 Meter Quickstart
Electro Industries/GaugeTech
™
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a. For the serial ports, the settings are:
- Address (must be unique to the device)
- Baud Rate (must match that of any device connected to this port)
- Data Bits (for Modbus RTU and ASCII, leave as the default - 8)
- Parity (for Modbus RTU and ASCII, leave as the default - None)
- Stop Bits (for Modbus RTU and ASCII, leave as the default - 1)
- Tx Delay (leave at the default - 0, unless you are using equipment that requires a delay in the
response time, such as a radio modem)
- Protocol (Modbus ASCII, Modbus RTU, or DNP3)
and for ports 3 and 4
- Mode (Slave or I/O Master - see note, below)
b. For the Network Option (INP200), the settings are:
- IP Address
- Subnet Mask
- Default Gateway.
The Advanced Settings button lets you set up additional features for the Network Option. See
Chapter 21 in the CommunicatorPQA
TM
, MeterManagerPQA
TM
, and EnergyPQA.com
TM
Software
User Manual for instructions on these settings.
c. Ethernet Gateway settings let you set the Baud Rate and Delay when the meter is being used as
an Ethernet Gateway - see Chapter 21 in the CommunicatorPQA
TM
, MeterManagerPQA
TM
, and
EnergyPQA.com
TM
Software User Manual for additional information on the Ethernet Gateway.
d. The Internal Modem (INP2) settings let you specify the number of rings before the modem picks
up and the Modem gateway’s Baud Rate. You can also configure the Dial Out settings for the
Modem Option (conditions on which the modem will dial out, etc) by clicking Dial Out Profile.
Detailed instructions are in Chapter 24 of the Software user manual.
e. Click OK.
NOTES on Communications Settings:
• When the Network Option is installed, Port 2 is unavailable.
• When the Internal Modem Option is installed and set to Address 1, Port 2 settings are ignored. The
modem Baud rate is 9500.
• Ports 3 and 4 can be set as I/O Masters. If you are setting a port as an I/O Master, use Modbus RTU
as its protocol.
• The port an external display is assigned to must have an Address of 1 and a Baud Rate of 9600.