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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Interface module LRZ 912
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