Cameron NUFLO MC-III EXP, Руководство пользователя

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MC-III™ EXP Flow Analyzer Section 4
Bus Delay
Bus delay is the amount of time (in milliseconds) that passes before the MC-III EXP attempts to take control
of the RS-485 bus and transmit a message back to the requesting device. The MC-III EXP responds very
quickly to incoming Modbus
®
requests—in some cases, too quickly. A configurable delay allows the user to
control this response time. A setting of 10 ms is normally sufficient, but may require adjustment when the
MC-III EXP is communicating with a radio or other end device that responds more slowly.
Bus Timeout
Bus timeout is the amount of time (in milliseconds) that must pass to cause the MC-III EXP to reset its
internal Modbus
®
message handler. The default value of 50 ms is normally sufficient.
Software Communication Options
The default timing parameters in the MC-III EXP support communication with most radios and Modbus
®
devices. However, if the MC-III EXP is used with a device that has a very slow response time, it may be
necessary to adjust the timing parameters to enhance performance. For information about these parameters,
see
Timing Parameters, page B-4
.
Wellsite Information
The Wellsite Information screen (Figure 4.20) allows users to enter information that distinguishes the wellsite,
such as company name, well name, and site location. While most of the fields on this screen are optional, a
well name should be assigned.
The well name (limited to 20 characters in length) will also serve as the name of the folder where flow logs
generated by the MC-III software will be archived. If a well name is not entered on this screen, logs will be
saved in a folder titled “NO_WELLNAME.”
Figure 4.20—Wellsite Information screen