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Unable to connect direct serial or external serial modem
Section 2: Troubleshooting
Maintenance and Troubleshooting Manual
December 2017
3-9000-764 Rev F
2.2.2
Unable to connect direct serial or external serial modem
If you are using Windows® XP, Windows® Vista or Windows® 7 make sure that you do not have
more than one modem driver installed to the same COM port. Typically this will only be
necessary if you use one COM port to talk direct (serial communications) and use the same COM
port to connect to an external modem. This is an apparent limitation in Microsoft’s® Dial-up
Networking. If more than one modem driver is installed for a particular COM port, Dial-up
Networking will always use the last driver installed regardless of what is selected. The only work
around is to only install one modem driver per COM port on the PC at a time. Refer to the Daniel
MeterLink Quick Start Manual (P/N 3-9000-763) for phone and modem details. The manual
may also be downloaded from the Daniel website.
http://www2.emersonprocess.com/en-US/brands/daniel/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
Daniel 3814 Liquid Ultrasonic Flow Meter, refer to the following:
•
Ethernet Connections (
•
Direct Serial Connections (
2.2.4
Ethernet connections
If you received this message 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 in the
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. 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 Comm settings on the CPU Module. Also, verify your wiring between the meter and
the computer running DUI using the Field Wiring drawing DMC- 004946. Verify the Comms
Address and Baud rate are correct in the Meter Directory record.
For additional information on wiring and configuring the meter for the various communication
options refer to the Daniel 3814 Liquid Ultrasonic Flow Meter Installation Manual (P/N 3-9000-
760, Section 3.5).