Installing/Mounting
4.2 Connecting a CU240S via Terminals
Control Units CU240S
Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD
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4.2.1
Frequency setpoint via terminals
Description
As a source for both the frequency setpoint and the additional frequency setpoint the analog
input terminals can be used. Depending on the customer's needs it can be used as voltage
or as current inputs. By default the AI0 and AI1 are set as voltage input terminals.
AI0 and AI1 used as voltage inputs
To use it as voltage inputs the following must be performed:
1.
DIP switch settings:
Set the analog input DIP switches to OFF-position (default setting) (DIP switch 1 refers
to AI0, DIP switch 2 refers to AI1)
2.
Paramter settings
Example, using analog input as bipolar voltage input (-10 V … 10 V)
Parameter
Description
P0003 = 3
User access level*
3: Expert: For expert use only
P1000[0] = 2 Selection of frequency setpoint*
2: Analog setpoint (Default setting)
Switch over from voltage to current input
P0756[0] = 4 Type of AI0 (P0756[1] for AI1)
Sets analog input 0 (AI0) to "bipolar voltage input (-10 V … 10 V)"
The figure shows the control wiring to use the analog
inputs as voltage inputs for both, frequency setpoint and
an additional setpoint, using potentiometers on analog
inputs AI0 and AI1.
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