User manual

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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 congurable delay allows the user to
control this response time. A setting of 10 ms is normally sufcient, 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 sufcient.
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 elds 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 ow 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