Allen-Bradley PowerFlex400, Руководство пользователя

Страница: 86 / 192

3-34 Programming and Parameters
Advanced Program Group (continued)
A152 [PID Ref Sel]
Related Parameter(s): P038 , T070 , T071 , T072 , T074 , T075
Stop drive before changing this parameter.
Enables/disables PID mode and selects the source of the PID reference. Refer to Appendix D for
details.
Options 0 “PID Disabled” (Default)
1 “PID Setpoint”
2 “Analog In 1”
3 “Analog In 2”
4 “Comm Port”
5 “Setpnt, Trim” Use PID output as Trim on [Frequency Select]
6 “A-In 1, Trim” Use PID output as Trim on [Frequency Select]
7 “A-In 2, Trim”
(1)
Use PID output as Trim on [Frequency Select]
8 “Comm, Trim” Use PID output as Trim on [Frequency Select]
(1)
The PID will not function with bipolar input. It will ignore any negative voltages and treat them like
zero.
Note : PID analog reference is scaled through the [Analog In x Hi/Lo] parameters. The invert operation
is obtained through programming these two parameters. If A152 [PID Ref Sel] is not set to zero,
PID can be disabled by programming a digital input.
A153 [PID Feedback Sel]
Related Parameter(s): T070 , T071 , T074 , T075
Select the source of the PID feedback. Refer to Appendix D for details.
Options 0 “Analog In 1” (Default) The PID will not function with a bipolar input. Negative
voltages are treated as 0 volts.
1 “Analog In 2”
(1)
2 “Comm Port”
(1)
The PID will not function with bipolar input. It will ignore any negative voltages and treat them like
zero.
Note : PID analog reference is scaled through the [Analog In x Hi/Lo] parameters. The invert operation
is obtained through programming these two parameters.
A154 [PID Prop Gain]
Sets the value for the PID proportional component when the PID mode is enabled by A152 [PID Ref
Sel].
Values Default: 1.00
Min/Max: 0.00/99.99
Display: 0.01
A155 [PID Integ Time]
Sets the value for the PID integral component when the PID mode is enabled by A152 [PID Ref Sel].
Values Default: 2.0 Secs
Min/Max: 0.0/999.9 Secs
Display: 0.1 Secs