Table of Contents
Advertisement
3810 Communication and Output settings
February 2024
Table C-1: CPU Module Labeling and LED Functions
DHCP
PORT A
MEAS
PWR
LED 4
LED 5
RX
58
(continued)
Dynamic Host Protocol Server
- enables you to communicate
with a Rosemount
™
Ultrasonic
meter that is not connected to
a network.
When the CPU Module switch is
in the ON position, the meter
is enabled to act as a DHCP
server for a single DHCP client
connected to the Ethernet port
using a crossover cable. This
should be used for peer to peer
connections only.
When the connection is made,
select to use the Meter Name in
the meter instead of the Meter
Directory Name in order to keep
all log files and configurations
separate from each meter.
PORT A override - RS-232
serves as an override
during meter commissioning
to establish communications
and in the event the user
cannot communicate with the
meter due to an inadvertent
communication configuration
change. The override period is
for two minutes. Supports:
•
auto-detected ASCII (Start
bit 1, Data Bit 7, Parity Odd/
Even, Stop Bit 1)
•
RTU (Start Bit 1, Data Bit 8,
Parity none, Stop Bit 1).
•
Modbus protocols RS-232
Baud rate=19,200 Modbus
ID=32
System color indicates
metrology mode Acquisition
mode
Measurement mode
3.3 V Power Indicator
Not used
Not used
RX signal (Port A for RS485
or RS232 communication)
receiving data
Upgrade kit instructions
00825-0200-3810
Switch position
•
ON - the meter is enabled to
act as a DHCP server for a
single DHCP client
•
OFF - disables the DHCP
server
Switch position
•
ON - enables RS-232 PORT A
override
•
OFF - (default setting)
disables RS-232 PORT A
override
LED status
•
Red flashing LED
•
Solid red the Acquisition
Module is not
communicating with the
CPU Module
•
Green flashing LED
Solid Green
Flashing green (when receiving
data)
3810 Series Electronics
Advertisement
Table of Contents
