F-Mix Analog Input Configuration - gefran 3850T Use And Installation Manual

4.15.1.2. F-MIX analog input configuration

All module analog inputs are listed in the upper group, one
per line. Each input is identified by its progressive number,
which corresponds to that shown in the module wiring
diagram (see paragraph "2.7. F-MIX module connection
diagrams" on page 26).
Additional input configuration parameters are shown in the
lower group.
• F-MIX: identification number of the module to be con-
figured. It can be selected with the + key. In the module
group, the F-MIX modules are numbered progressively,
with the module next to the communication module
assuming number 1.
• F: set Fahrenheit degrees as temperature unit of mea-
sure. Warning! Changing the unit of measure does not
automatically change the value set for the temperature.
• INx Type: input type, which is selected from a pop-up
window. For further information see paragraph "10.4.
F-MIX module" on page 150.
The selected type is displayed in the Type field.
Warning!The instrument must be restarted after mak-
ing this change.
• Name: the variable name associated with the input.
Touching the field opens the virtual keyboard where
you can enter an identifying name as you like. The
name must be unique for the entire controller and can
be up to 16 characters long, chosen from a ... z, A ... Z.
0...9 and _. This name is used in creating programs, in
all logical functions etc.
• Offset: Positive or negative deviation from analog
channel reading. It is used to change the value read, for
example, for precision calibration.
• Value: actual value read.
• [mis]: the temperature unit of measure, or other unit of
measure set by choice in the case of it is not tempera-
ture.
• Filter: filters the input signal to mitigate sudden chang-
es in the sampled value. When setting a number n In
the Filter field, the controller assumes the average val-
ue between the last sampled value and the n previously
sampled values. With Filter equal to 0, only the last
sampled value is valid.
The following parameters are used for analog input calibra-
tion and conversion:
• Ana PV: points read by the board.
• Ana min: minimum number of points for calibration.
• Ana max: maximum number of points for calibration.
• Eng PV: resulting engineering unit.
• Eng min: minimum engineering unit for calibration.
• Eng max: maximum engineering unit for calibration.
80703B_MHW_2850T/3850T_02-2019_ENG
For more information on calibration and linear conversion,
see paragraph "7.3. Correction of linear inputs and outputs"
on page 107.
• D.P.: set the number of decimal places (max 3) to dis-
play the value in engineering units. For temperatures,
the precision is set to 1 decimal.
To configure the other module inputs and outputs, tap the
key at the top of the screen.
Use the CT button to access calibration of the dedicated
inputs to the current transformers
Calibration of analogue input Current Transformer
You can change the settings on the two inputs (present on
each F-MIX card) for the current transformers.
The top part contains configuration parameters:
• F-MIX: number identifying the module to be configured.
May be selected with the + button.
• Name: name to be assigned to the variable for use in
the rest of the application.
• Value: value effectively measured.
• Filter: filters the input signal to mitigate sudden chang-
es in the sampled value. When setting a number n In
the Filter field, the controller assumes the average val-
ue between the last sampled value and the n previously
sampled values. With Filter equal to 0, only the last
sampled value is valid.
In the lower part are the configuration parameters for four-
point calibration, described for the analogue IN card.The
following parameters are used:
• TA mA: card reading in mA.
• min mA: minimum number of mA for calibration.
• max mA: maximum number of mA for calibration.
• Load A: Load amperes.
• A min: minimum current for calibration.
• A max: maximum current for calibration.
This parameter (TA) may be used in the ENERGY submenu
and in the menus for the HB alarms on the PID.
To go back to the analogue IN card, simply press the X
button.
4. CONFIGURATION
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