Future Design MCTB 4.3, Руководство пользователя

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MCTB
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4.2.38 Ramp Rate Up Low/Upper Limit
(MCTB 4.3” version 4MA V1.3 only)
The ramp rate up low and upper limit entries are used to define the minimum and maximum ramp rate the user
can set for the rate of change of the loop set point under ramp rate operation when the set point is above the
current process value. The low limit can be set from 0 up to the upper limit. The upper limit can be set from
the low limit value up to 5000 for units of degrees Centigrade or 9000 for units of degrees Fahrenheit or linear
inputs.
NOTE:
The minimum and maximum scale values are limited by the decimal point selection. For a decimal
of 0, the values are 0-5000°C (0-9000°F). For one decimal point, the values are 0.0 and 500.0°C (0.0
and 900.0°F). For two decimal digits (liner inputs), the values are 0.00 and 90.00 and for three
decimal digits the values are 0.000 and 9.000.
4.2.39 Setpoint 2 Format
(MCTB 4.3” version 4MA V1.3 only)
When the evet input of the loop is set for the “Activate SP2” function (see section
4.2.7 Event Input Function ),
the set point 2 format selection will be active. This selection allows the user to choose the format of set point 2
and how the value is applied. Once the desired
format has been selected, press the “Done” button to return to
the main Loop Configuration screen.
The
Actual selection means that set point 2 will be an actual set point value, i.e., temperature for example.
When the event input is then activated, the value entered for set point 2 (see following section) will be used as
the loop set point, overriding the current user entered or operating program set point. When the event input is
deactivated, the loop set point will then revert back to the user entered or operating program set point.
The
Deviation selection means that set point 2 will be an offset to the current loop set point. When the event
input is activated, the value entered for set point 2 (see following section) will be added to the current user
entered or operating program set point. Thus, if the user enters a new set point, or the set point defined by the
operating program changes, the loop set point will also change while maintaining the offset defined by the value
of set point 2. When the event input is deactivated, the loop set point will revert back to the actual user entered
or operating program set point.
4.2.40 Setpoint 2
(MCTB 4.3” version 4MA V1.3 only)
When the evet input of the loop is set for the “Activate SP2” function (see section
4.2.7 Event Input Function )
the set point 2 entry will be active. If the set point 2 format is set for “Actual” (see previous section), set point 2
can
be entered with lower and upper limits matching the loop’s low and high limit set points.
If the set point 2 format is set for “Deviation” (see previous section), the minimum and maximum entry values
are limited by the decimal point selection. For temperature in degrees Centigrade and, a decimal of 0, the
values are -18000 and 18000 respectively. For one decimal point, the values are -1800.0 and 1800.0.