CARLO GAVAZZI G3800 X015 - CONFIGURATION SOFTWARE User Manual page 26

G 3800 X015 Configuration Software
Parameters
Configuration window of the analog sensor function:
In general, the operation of sensors depends on the purpose of using the values:
Showing data on PC, Touchscreen or Text display
In this case, the parameters "Control output" and "Alternative input" should not be activated, because in that
case the analog value will only be transmitted and not displayed. Finally, the measuring range should be con-
figured with minimum and maximum values (eg -30 ˚C and +60 ˚C):
Hint: In this operating mode, limit values can be set. It is also possible to use the switching commands of this
channel as input in logic functions without activating the parameter "Control output".
Switching an electrical load by means of the sensor
For this purpose, the parameter " Control output" must be activated in order to output the set limit values.
This output function causes a switching command on this channel and thereby an output (eg relay) on the
same address. The sensor is to be configured as follows:
1. Enter the measuring range of the sensor (stated directly on the sensor or in the user manual), e.g. -30 ˚C
and +60 ˚C.
2. Enter the switching range at which the object switches on or off: Standard setting gives the threshold value
Off < Limit and On > Limit. This means that the channel switches off when the analog value drops below the
first entered value, and the channel switches on when the analog value exceeds the second entered value.
But this is rarely the case. More often - and in particular in heating control systems - the heating element is to
switch on when the temperature drops below set value and switch off when set value is exceeded. The invert-
ed output function needed for this purpose is selected with the parameter "Invert limits", which changes the
entered values into On < Limit and Off > Limit. Select the values appearing in the window in order to control
the temperature of a room within the range of 19 ˚C and 21 ˚C.
3. If you want to add night setback to your heating control system, select the option "Enable Limit 2" to enter
a second pair of limit values and specify a channel or flag in the field "Enabled by address", eg address A3
configured for the real-time clock function.
Hint: These limits can also be inverted by clicking "Invert limits".
4. The entire analog signal output can be disabled through a channel or a flag by entering a "Disable
address". When the Disable address is switched on, the sensor object switches neither On nor Off.
5. Finally, the analog values can also in this case be provided by another channel. By clicking in the field
"Alternative input" and entering an address in the field "Measuring channel", an analog value can generate a
random number of outputs.
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When the Configuration Software has
been connected to the master, the
actual values are shown:
© 2002 Carlo Gavazzi Industri A/S. All rights reserved
October 2002