Configuration of analog and digital setpoints and actual values
Analog setpoints via terminal
10
Function library
10.8
10.8.2
L
10.8-5
EDS82EV903-1.0-11/2002
1. Assign the desired setpoint or actual value to an analog input under C0412
(C0412/x = 1 or 4).
)
))
) Note!
In addition to the free configuration under C0412 it is also
possible to select a fixed configuration under C0005.
2. Select the setpoint range under C0034.
3. Set the switch and jumper at the function module for the same range.
Otherwise the setpoint signal cannot be interpreted correctly.
– The setpoint signal is only evaluated in the setpoint range set (C0034),
independently of the gain.
– The minimum output frequency (C0010) corresponds to 0 % setpoint
signal.
– With offset ≠ 0 % and/or inverse setpoint selection the value set under
C0010 may not be reached.
4. If necessary, adjust the gain (C0414)
– The gain always affects setpoint signal and offset.
– 100 % equals gain factor = 1.
– Calculate the gain on the basis of two points of the setpoint characteristic
and observe the signs of the coordinates:
Gain [%] =
f(P
2
) − f(P
1
)
U(P
2
) − U(P
1
)
⋅ 100 %
5. If necessary, adjust the offset (C0413).
– The offset shifts the characteristic.
– A dead band can be set through the offset and if necessary via C0239
(lower frequency limit).
– Calculate the offset from the calculated gain and one point of the setpoint
characteristic and observe the signs of the coordinates:
Offset (P
2
)[%]=
f(P
2
)[%]
Gain [%]
⋅ 100 % − U(P
2
)[%]
)
))
) Note!
l C0026, C0027, C0413 and C0414 are identical in all parameter
sets.
l At operation with application I/O the setpoint inputs can be
adjusted automatically via C0430, C0431 and C0432:
– Select a setpoint input under C0430.
– Enter the coordinates of two points of the setpoint
characteristic under C0431 and C0432.
– The calculated values are entered automatically as offset
(C0413) and gain (C0414).
Adjustment
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