User`s guide

Series D8 User’s Guide Chapter 6: Menu and Parameter Reference
Doc. 0600-3120-2000 Watlow Anafaze 149
Cascade Menu
Use the cascade menu to configure cascade control. Use cas-
cade control to calculate the set point of the current loop (the
secondary, or outer, loop) based upon the output of another
loop (the primary, or inner, loop).
For more information about cascade control, see Setting Up
Cascade Control on page 100.
Cascade Primary Loop
Choose the primary loop. The controller uses the output of the
primary loop to calculate the set point of the current loop.
Values: none (0), or loop 1 to 4 (1 to 4) for a four loop-con-
troller or 1 to 8 (1 to 8) for an eight-loop controller. You can-
not choose the current loop. Values in parentheses are for
communications.
Default: none (0)
DeviceNet Object: Cascade (6A hex)
Cascade Low Set Point
Enter the set point to use for the current loop when the output
of the primary loop is at its minimum value. The set point will
never drop below this value.
• If the primary loop has only the heat output enabled, then
this value is the set point when the heat output of the pri-
mary loop is 0 percent.
• If the primary loop has only the cool output enabled or
has the heat and cool outputs enabled, then this value is
the set point when the cool output is 100 percent.
Values: For a thermocouple or RTD input, any value within
the input range (see Table 6.7 ). For a process input, any value
between the Input range low and Input range high parameters.
This value must be less than the Cascade hi SP parameter.
Default: 25 for a thermocouple, RTD or process input.
Decimal Placement for DeviceNet: See Decimal Placement
for Numeric Values on page 59.
DeviceNet Object: Cascade (6A hex)
Cascade High Set Point
Enter the set point to use for the current loop when the output
of primary loop is at its maximum value. The set point will
never exceed this value.
l01 Cascade r
Other menus b
l01 Cascade r
prim loop bnone
l01 Cascade lowr
SP b 25 ˚C
l01 Cascade hi r
SP b 25 ˚C