Watlow CPC400 Manual de usuario Pagina 89

  • Descarga
  • Añadir a mis manuales
  • Imprimir
  • Pagina
    / 230
  • Tabla de contenidos
  • MARCADORES
  • Valorado. / 5. Basado en revisión del cliente
Vista de pagina 88
CPC400 Series User’s Guide Chapter 3: Operation and Setup
Doc. 0600-2900-2000 Watlow Anafaze 75
Figure 3.14 Application Using Ratio Control
Table 3.12 Ratio Control Settings for the Ratio
Loop (Loop 2) in the Example
Setting Up Differential Control
Differential control is a simple application of ratio control,
used to control one process (ratio loop) at a differential, or
offset, to another process (master loop).
How to Set Up Differential Control
Set up differential control as you would set up ratio control.
Set the Control ratio parameter to 1.0, and enter the de-
sired set point differential (offset) at the Ratio SP diff pa-
rameter.
Menu Parameter Value Comment
Ratio Ratio master loop 01
Loop 1 is the master loop.
Ratio Ratio low SP 0.0
The minimum ratio loop set point is 0.0 gallons
per second (gps).
Ratio Ratio high SP 7.0
The maximum ratio loop set point is 7.0 gps.
Ratio Control ratio 0.5
The H
2
0 flow rate (10 gps) is multiplied by 0.5
to obtain the KOH flow rate (5 gps).
Ratio Ratio SP diff 0
For this example, there is no set point differential.
CPC400
Loop 1 PID Output
Loop 2 PID Output
Loop 1 Input
Process Variable
Loop 2 Input
Process Variable
Motorized Control Valve 2
Motorized
Control
Valve 1
Mixture Output
Water Input
KOH Input
Flow
Transducer
Loop 1: Water Flow Control Loop
Loop 2: KOH Flow Control Loop
Serial
DAC
Serial
DAC
Vista de pagina 88
1 2 ... 84 85 86 87 88 89 90 91 92 93 94 ... 229 230

Comentarios a estos manuales

Sin comentarios