Lauda LRZ 912 - Configuring the Interface

7.3 Configuring the interface
The inputs and outputs on the analog interface can be controlled using
either current values or voltage values. The following signaling parameters are
available:
Signaling ( status ) Upper limit Lower limit
0 – 10 V 0 V 10 V
0 – 20 mA 0 mA 20 mA
4 – 20 mA 4 mA 20 mA
The inputs and outputs of the analog interface can be configured independ-
ently of one another. The signaling "4 – 20 mA" also allows the detection of
signal losses (decrease to 0 mA).
The working range of the selected function can be scaled freely by assigning
limit values accordingly:
Example: Analog input 1 with 0 – 20 mA signaling, set temperature function
 Minimum value = 0 assigns the value 0 °C as the lower limit.
 Maximum value
= 100 assigns the value 100 °C as the upper limit.
When this setting is selected, set temperatures between 0 and 100 °C can
be configured by changing the current value from 0 to 20 mA. For this
sample configuration, the following settings must be selected in the analog
interface menu:
Menu  Analog interf.  Analog input 1
1. Select the value Current 0 – 20 mA
for the Status parameter.
2. Select the value Set temperature for the Function parameter.
3. Enter the value 0 for the Minimum value parameter.
4. Enter the value 100 for the Maximum value parameter.
5. Configure all other settings in the same way.
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