Watlow CPC400 - Manual (Page 141)

CPC400 Series User’s Guide Chapter 5: Menu and Parameter Reference
Doc. 0600-2900-2000 Watlow Anafaze 127
Cascade Menu
Use the cascade menu to configure cascade control. Use
cascade control to calculate the set point of the current loop
(the secondary, or outer, loop) based upon the output of an-
other loop (the primary, or inner, loop).
For more information about cascade control, see Setting Up
Cascade Control on page 69.
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 5 (1 to 5) for a CPC404 or 1 to
9 (1 to 9) for a CPC408. You cannot choose the current loop.
Values in parentheses are for serial communications or
LogicPro.
Default: none (0)
Modbus Address (Loops 1 to 9): 44648 to 44654
Parameter Number: 99
LogicPro Driver: Database
LogicPro Address (Loops 1 to 9): 99.1 to 99.9
Cascade Low Set Point
Enter the set point to use for the current loop when the out-
put 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 primary 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 with-
in the input range (see Table 5.7 on page 104). For a pro-
cess or pulse 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; 0 for
the pulse input
Modbus Address (Loops 1 to 9): 44682 to 44690
Parameter Number: 101
LogicPro Driver: Database.
LogicPro Address (Loops 1 to 9): 101.1 to 101.9
Decimal Placement for Modbus or LogicPro: See Dec-
imal Placement for Numeric Values on page 80.
l01 Cascade r
Other menus b
l01 Cascade r
prim loop bnone
l01 Cascade lowr
SP b 25 ˚F