Future Design MCTB 4.3, Руководство пользователя

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MCTB
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NOTE: Each input is equipped with a slide switch for selecting voltage or current input type. The switch must
be set properly according to the input type selection made. See section
3.3.1 Sensor Wiring for details
on sensor wiring and switch settings according to selected sensor type.
4.4.3 Input Units
The Input Units entry is used to select the temperature units for thermocouple input types. If the selected input
type for the monitor point is a linear input (VDC or mA), the Input Units entry will display the text entry keypad
allowing the user or OEM to enter specific engineering units up to 4 characters.
The input unit selections for temperature are mutually exclusive, i.e., selecting one will turn off the other. Once
the desired temperature units have been selected, press the “Done” button to set the input units for the monitor
point and return to the main Monitor Configuration screen.
4.4.4 Decimal Point
The Decimal Point entry allows the input precision to be adjusted between 0 and 1 decimal digits for temperature
input types (thermocouple) and between 0 and 3 for linear input types (VDC and mA).
IMPORTANT: Once the monitor point has been configured with a specific decimal point, changing the decimal
point will require the low/high scale to be reconfigured for linear input types in order to maintain
the previous input span. An entry of 100.0 becomes 1000 when changing the decimal point to
zero (not 100) and must be re-entered to set the proper value.
4.4.5 Input Low/High Scale
The Input Low Scale and Input High Scale entries are used to set the input range for linear input types (VDC or
mA). The entries are not available for thermocouple inputs since they utilize a fixed range based on the sensor
type. The input low scale value can be set from -32768 up to the high scale value. The high scale value can
be set from the low scale value up to 32767.
NOTE:
The minimum and maximum scale values are limited by the decimal point selection. For a decimal
of 0, the values are -32768 and 32767 respectively. For one decimal point, the values are -3276.8
and 3276.7. For two decimal digits, the values are -327.68 and 327.67 and for three decimal digits
the values are -32.768 and 32.767.