Watlow CPC400 - Manual (Page 143)

CPC400 Series User’s Guide Chapter 5: Menu and Parameter Reference
Doc. 0600-2900-2000 Watlow Anafaze 129
Ratio Low Set Point
Enter the lowest allowable set point for the current loop.
The set point will never drop below this value, regardless of
the result of the ratio calculation.
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 Ratio high SP parameter.
Default: 25 (or 0 for the pulse input)
Modbus Address (Loops 1 to 9): 44767 to 44775
Parameter Number: 106
LogicPro Driver: Database
LogicPro Address (Loops 1 to 9): 106.1 to 106.9
Decimal Placement for Modbus or LogicPro: See Dec-
imal Placement for Numeric Values on page 80.
Ratio High Set Point
Enter the highest allowable set point for the current loop.
The set point will never exceed this value, regardless of the
result of the ratio calculation.
Values: For a thermocouple or RTD input, any value in the
input sensor range; see Table 5.7 on page 104. For a pro-
cess or pulse input, any value from Input range low to Input
range high. This value must be greater than the Ratio low
SP parameter.
Default: 25 (0 for the pulse input)
Modbus Address (Loops 1 to 9): 44784 to 44792
Parameter Number: 107
LogicPro Driver: Database
LogicPro Address (Loops 1 to 9): 107.1 to 107.9
Decimal Placement for Modbus or LogicPro: See Dec-
imal Placement for Numeric Values on page 80.
Control Ratio
Enter the factor by which to multiply the process variable
of the master loop to calculate the set point of the ratio loop.
Values: .1 to 999.9 (1 to 9999). Values in parentheses are
for serial communications and LogicPro (values are in
tenths).
Default: 1.0 (10) for a thermocouple, RTD or process input;
.0 (0) for a pulse input
Modbus Address (Loops 1 to 9): 44801 to 44809
Parameter Number: 108
LogicPro Driver: Database
LogicPro Address (Loops 1 to 9): 108.1 to 108.9
l01 Ratio low r
SP b 25 ˚F
l01 Ratio high r
SP b 25 ˚F
l01 Control r
ratio b 1.0