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Upgrade kit instructions
00825-0200-3810
Table C-3: Serial Port Parameters
Port/communication
•
Port A (Standard)
•
RS-232
•
RS-485 Half Duplex
•
RS-485 ( 2-wire
communication on Port A.)
Ethernet
(1)
RS-485 2-wire connections use TX+ and TX - on the CPU Module.
(2)
Denotes auto-detected protocols.
(3)
Denotes auto-detected protocols.
(4)
Denotes auto-detected protocols.
(5)
Denotes auto-detected protocols.
NOTICE
If not using Ethernet, a full duplex serial connection is necessary for MeterLink to
communicate with a Rosemount 3810Series Ultrasonic Flow Meter.
Emerson.com
3810 Communication and Output settings
Description
•
Typically used for general
communications with a flow
computer, RTU (Modbus
slave) and radios.
•
RS-485 - 2-wire (Half Duplex)
connected to TX + and TX -
(1)
•
Special override mode to
force port configuration to
known settings.
•
Supports RTS/CTS
handshaking with software-
configurable RTS on/off
delay times.
•
Factory default is RS-232,
Address 32, 19200 baud.
Preferred port for diagnostic
communication via MeterLink
10 Mbps/100 Mbps
February 2024
Common features
•
Communications via
MeterLink using RS-232 or
RS-485 Full Duplex
•
Software configurable
Modbus Address (1-247)
•
Auto-detects TCP/IP and
ASCII or RTU Protocol
•
ASCII Protocol:
—
Start Bits = 1, Data Bits =
7
(2)
—
Parity: odd or even 1,
Stop Bits = 1
(3)
—
Baud Rates: 1200, 2400,
9600, 19200, 38400,
57600, 115000 bps
—
•
RTU Protocol: Start Bits = 1,
Data Bits = 8
(4)
—
Parity: none, Stop Bits =
1
(5)
—
Baud Rates: 1200, 2400,
9600, 19200, 38400,
57600, 115000 bps
Modbus TCP/IP, Modbus TCP
65
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