Eaton MMX34AA9D0 Series User Manual

Parameters
04/10 MN04020001Z-EN
102
Activating/deactivating PID controller
With a digital input (in FS DI6) configured as PID, PID control can
be switched on and off through control signal terminals. When you
activate the PID input, PID control is disabled. The frequency
inverter then works with its standard frequency control again.
X Parameterize one of the digital inputs 1 to 6 as a PID, by setting
the parameter (P3.12 = 1 - 6) (factory setting (P3.12 = 6).
PID-system deviation (OD)
The PID-system deviation (e) is the difference between reference
and actual value (process variable PV).
The digital output configured as OD is activated if a freely
selectable control deviation (P9.17) is exceeded with the PID
controller (P9.1 = 1) active. The OD output stays activated until
this limit value is exceeded.
X If you wish to configure a parameterizable digital output or
signalling relay as OD, you must set at P9.17 the limit value that
activates the OD signal when exceeded.
X Then parameterize one of the digital inputs as OD output by
setting the value 12 at P5.1 (2.3).
Feedback value check signal (FBV)
The FBV (Feedback Value Check) signal is issued when the actual
(process) value (PV) drops below the lower limit value (P9.16) in
RUN mode. It remains active until:
• The actual value exceeds the upper limit value (P9.15).
• the frequency inverter changes from RUN mode to STOP mode
(deceleration with the set ramp time).
P9.18 1475 / PID controller, scale setpoint display. 1
Setting range: 0.1 - 32.7
Setpoint display, multiplication of a factor to display
process-adjusted variables.
The value is displayed in M1.17.
P9.19 1476 / PID controller, scale actual value display. 1
Setting range: 0.1 - 32.7
Actual value indication, multiplication factor for displaying
process variables.
The value is displayed in M1.18.
P9.20 1478 / PID controller – output signal limit. 100.0
Setting range: 0.00 - 100.0 %
PNU ID Access right
RUN
Value Description Factory setting
(P1.3)
h
This function is available only when PID control is active
(P9.1 = 1).
h
Do not switch the PID controller on and off while the
frequency inverter is in RUN mode (RUN LED is lit).
h
The Activate/Disable PID Control function is optional. If
you want PID control to be active all the time, you only
need to set P9.1 = 1.
Figure 89: Function chart for OD (PID system deviation)
a Setpoint value
b Actual value
OD
a
b
P9.17
P9.17

Eaton MMX34AA9D0 Series Specifications

General

Brand	Eaton
Model	MMX34AA9D0 Series
Category	DC Drives
Language	English