WEG bacnet CFW701 Quick Setup Manual - page 14
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CFW700 HVAC-R Drives
14
PROG
DEF
User
Description
Control connections
P0222
1
7
Remote reference = AI1
P0231
5
5
AI1 signal function = main PID
P0233
0
1
AI1 = 4 - 20 mA
PID controller
P1017
0
Δ
0 = disable PID / 1 = Direct / 2 = Reverse
P1020
2)
1
PID proportional gain
P1021
2)
0.430
PID integral gain
P1022
2)
0
PID derivative gain
Process variable - engineering unit
P0510
24
Δ
21 = °F; 22 = bar; 24 = psi; 36 = gal/s; 37 = gal/min;
40 = l/min; 50 = m³/h
P0511
1
1
Decimal point of engineering unit = wyw.z
Sensor scale
P1027
1)
0
Δ
Sensor minimum level (%)
P1028
1)
1000
Sensor maximum level (%)
Setpoint
P1011
1)
0
Δ
Setpoint by HMI
DIP SWITCH
S1.2 = ON
A|1
Notes: Δ Setting depends on application.
1) According to the selection of the engineering unit (P0510 and P0511
parameter).
2) Only change these parameters if it is necessary to improve the system
response.
Important: CFW701 offers two (AI2 and AI3) external PID Controllers for use to control
independent process variables (it might be for the control of external process not
related to what the main PID loop is handling). This discards the use of an additional
PID controller. Refer to CFW701 programming manual chapter 19.9 and 19.10 for
further information.
Examples of applications:
J
Pump
J
Direct: increase the pressure, increase the pump speed
J
Cooling tower
J
Reverse: increase temperature, decrease fan speed
Direct
Reverse
Process variable
VFD speed