Watlow CLS200 - Manual (Page 135)

CLS200 Series User’s Guide Chapter 6: Enhanced Features
Doc.# 0600-3050-2000 Watlow Anafaze 119
Figure 6.4 Relationship Between the Primary
Loop’s Output and the Secondary
Loop’s Setpoint
NOTE! Cascade control cannot be used on the same
control loop as ratio control. However, both
features may be used in the same multiloop
controller.
Setup Loop Cascade Menu
The setup parameters for cascade control appear under the
SETUP LOOP CASCADE menu.
Press YES to set up the cascade parameters. The loop cur-
rently displayed (loop 02 in this case) will be the secondary
control loop, which performs the actual control.
Primary Loop
Enter the primary loop number. The output percentage of
this loop will control the setpoint of the secondary loop.
Selectable values: Any loop except the secondary loop.
Calculation of new secondary loop setpoint:
Maximum SP
Minimum SP
Base SP
100% Cool 0% Heat
Base SP + |Cool Output P
ow
er| * Cool Span +
SP2 = Base SP + |Cool Output Power| * Cool Span + |Heat Output Power| * Heat Span
Primary Loop’s Output (%)
Secondar
y Loop’
s Setpoint
100%
|Heat Output P
ow
er| * Heat Span
ALARM
SETUP LOOP 02
CASCADE?
ALARM
02 CASCADE
PRIM. LOOP? 03