Nxs Pid Control - Honeywell NX Series Pocket Programming Manual

NXS PID Control

What You Need to Know
Motor nameplate data
− Nominal Current
− Nominal Speed
Setup
1 Run the Start Up Wizard
Automatically activated at 1
to Yes and cycle the main power.
Step Question
Basic Settings
1 Language
2 Application
Application Settings
3 Min. Frequency
4 Max. Frequency
5 Acceleration Time
6 Deceleration Time
Motor Settings
7 Nom. Voltage for the motor
8 Nom. Frequency for the motor Check motor nameplate
9 Nom. Speed for the motor
10 Nom. Current for the motor
Motor Cos ϕ
11
PID and Sensor Settings
12 PID Reference
13 Actual Input
2 Other Control Signal Settings
2 – 10 V: change the value of P2.2.16 AI1 signal range to 20 – 100 %
0 – 20 mA: change the value of P2.2.21 AI2 signal range to 0 – 20 mA
3 PID reference from keypad (if no external reference signal)
R3.4 PID reference value (set-point value in percentage)
% = ((set-point – minimum) / span) x 100
For example: set-point is 3.2 bar, the sensor span is 0 – 5 bar.
3.2 divided by 5 is 0.64; the value to set in P3.5 is thus 64
16
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Signal/sensor specification
− Signal type (volts, milliamps)
− Range (0-10, 2-10, 0-20, 4-20)
− Sensor span
st
start. To restart the wizard, set P6.5.3 Start Up Wizard
Recommendation
English
PID Control
20 Hz
50 Hz
30 s for Fan, 15 s for Pump
30 s for Fan, 15 s for Pump
Check motor nameplate
Check motor nameplate
Check motor nameplate
Check motor nameplate
Keypad reference
mA signal: AI2
V Signal: AI1
Fieldbus
mA signal: AI2
V signal: AI1
Note
Typical for Fan or Pump
Typical for Fan or Pump
Default typically OK
Default typically OK
Critical
Critical
Default typically OK
No controller
Signal from controller
Default: 4 – 20 mA
Default: 0 – 10 V