Programming Your Application 1-13
690+ Series Frequency Inverter
Functional Description
The Inverter has three analog outputs. There is an ANALOG OUTPUT function block
associated with each of these:
ANALOG OUTPUT 1 is associated with terminal 6
ANALOG OUTPUT 2 is associated with terminal 7
ANALOG OUTPUT 3 is associated with terminal 8
The scaling and offset parameters are applied to the demand value as shown.
If ABS is TRUE then the final output is the magnitude of value after being scaled and offset.
If ABS is FALSE then the final output will be limited to be within the range selected by TYPE.
X
OUTPUT
SCALE
+
OFFSET
VALUE
ABS
TYPE
In the examples given :
• Analog output 1 is a unipolar type only (eg. 0V to +10V)
• Analog outputs 2 & 3 are bipolar types only (eg. -10V to +10V)
• Basic scaling is that 100% on the value parameter is equivalent to +10V on the
analog output, and -100% is -10V
• Once the scale and offset are applied to the value parameter (the function
block input) the result is clamped to +/-100% before being converted to an
analog output
• If you select an unsupported type (eg. -10V to +10V for the unipolar Analog
output 1) then the analog output will be fixed at 0V
• Setting a value of -100% to Analog output 1 (0V to +10V) with the absolute
parameter set to True (default) gives an analog output of +10V
Setting a negative % value to Analog output 1 with the
absolute parameter set to False gives an analog output of
0V
To Next Page
Loading...
Need help?
General
