Scaling Of Analog And Pulse References And Feedback; Dead Band Around Zero - GE AF-650 GP Design Manual

3.3.3 Scaling of Analog and Pulse References and Feedback

References and feedback are scaled from analog and pulse inputs in the same way. The only difference is that a reference above or below the specified minimum
and maximum "endpoints" (P1 and P2 in the graph below) are clamped whereas a feedback above or below is not.
3
The endpoints P1 and P2 are defined by the following parameters depending on which analog or pulse input is used
P1 = (Minimum input value, Minimum reference value)
Minimum reference value
Minimum input value
P2 = (Maximum input value, Maximum reference value)
Maximum reference value
Maximum input value

3.3.4 Dead Band Around Zero

In some cases the reference (in rare cases also the feedback) should have a Dead Band around zero (i.e. to make sure the machine is stopped when the reference
is "near zero").
To make the dead band active and to set the amount of dead band, the following settings must be done:
• Either Minimum Reference Value (see table above for relevant parameter) or Maximum Reference Value must be zero. In other words; Either P1 or P2
must be on the X-axis in the graph below.
• And both points defining the scaling graph are in the same quadrant.
24
Analog 53 Analog 53
S201=OFF S201=ON
Par. AN-14 Ter- Par. AN-14 Termi-
minal 53 Low nal 53 Low Ref./
Ref./Feedb. Val- Feedb. Value
ue
Par. AN-10 Ter- Par. AN-12 Termi-
minal 53 Low nal 53 Low Current
Voltage [V] [mA]
Par. AN-15 Ter- Par. AN-15 Termi-
minal 53 High nal 53 High Ref./
Ref./Feedb. Val- Feedb. Value
ue
Par. AN-11 Ter- Par. AN-13 Termi-
minal 53 High nal 53 High Cur-
Voltage [V] rent [mA]
Analog 54 Analog 54
S202=OFF S202=ON
Par. AN-24 Ter- Par. AN-24 Termi-
minal 54 Low nal 54 Low Ref./
Ref./Feedb. Val- Feedb. Value
ue
Par. AN-20 Ter- Par. AN-22 Termi-
minal 54 Low nal 54 Low Cur-
Voltage [V] rent [mA]
Par. AN-25 Ter- Par. AN-25 Termi-
minal 54 High nal 54 High Ref./
Ref./Feedb. Val- Feedb. Value
ue
Par. AN-21 Ter- Par. AN-23 Termi-
minal 54 High nal 54 High Cur-
Voltage[V] rent[mA]
AF-650 GP Design Guide
Pulse Input 29 Pulse Input 33
Par. E-62 Term. 29 Par. E-67 Term. 33 Low
Low Ref./Feedb. Ref./Feedb. Value
Value
Par. E-60 Term. 29 Par. E-65 Term. 33 Low
Low Frequency Frequency [Hz]
[Hz]
Par. E-63 Term. 29 Par. E-68 Term. 33 High
High Ref./Feedb. Ref./Feedb. Value
Value
Par. E-61 Term. 29 Par. E-66 Term. 33 High
High Frequency Frequency [Hz]
[Hz]