on the PC at a time. Refer to the
MeterLink Quick Start Manual
(00809-0100-7630) for
phone and modem details. The manual may also be downloaded from the Emerson
website.
Emersonprocess.com/en-US/brands/Flow/ultrasonics/Pages/Ultrasonic.aspx
2.2.3
Unable to connect to meter
If you receive the error message “Unable to connect to meter” when trying to connect to a
Rosemount Liquid Ultrasonic Flow Meter, refer to the following:
•
Ethernet Connections (
•
Direct Serial Connections (
2.2.4
Ethernet connections
If you received the error message "Unable to connect to meter" while trying to connect
over Ethernet, verify you have the correct IP address in the Meter Directory record. If the
meter is to assign the IP address, make sure the IP address is set to 192.168.135.100 and
that the DHCP switch is
ON
position on the CPU Module. If the meter has a fixed IP
address, verify the IP address, Subnet, and Gateway are correct in the meter. Verify your
wiring to make sure you have a cross-over cable for a direct connection between the meter
and the computer. If going through a hub, verify that the computer and meter are
connected to the hub with straight-through patch cables.
2.2.5
Direct serial connections
Verify the switch settings on the CPU Module. Also verify your wiring between the meter
and the computer running MeterLink using the Field Wiring drawing DMC-004946. Verify
the Comms Address and Baud rate are correct in the Meter Directory record. If unsure of
the port settings for Port A on the CPU module, you can change the PORT A switch on the
CPU module from OFF to ON and the port will be forced to RS-232, 19200 baud rate,
Modbus ID=32 for two minutes.
For additional information on wiring and configuring the meter for the various
communication options, refer to the
Installation manual
(00825-0100-3812).
2.3
Troubleshoot Maintenance log files and trend
files
2.3.1
Files do not appear in workbook
Maintenance Log files and Trend files that exist on the PC do not appear in the Microsoft
®
Excel
®
workbooks tree under Trend Maintenance Logs.
This is most likely caused by the fact that the desired file or files are already open in
Microsoft
®
Excel
®
. Open files can not be verified as Maintenance Log files or Trend Files by
Maintenance and Troubleshooting Manual
Troubleshooting
00809-0100-3812
April 2022
Rosemount 3812 Liquid Ultrasonic Flow Meter
31
Содержание Rosemount 3812
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