Watlow F4T User Manual

Watlow F4T • 162 • Chapter 5 Function Reference
Offset
Adjustment added to the result of the calculation.
Range: -99,999.000 to 99,999.000
Filter
Set the amount of filtering to apply. Filtering smooths signal fluctuations. Increase the time to
increase filtering. Excessive filtering slows the function’s response.
Range: 0.0 to 60.0 seconds
Ratio
This function calculates the quotient: input X divided by input Y. A filter and offset may be
applied to the calculated value. If both inputs have the same units, the output has no units,
otherwise the output has the units of input X.
Signals
Direction
Label Type Function
Receivers
X Analog Value divided by Y (numerator)
Y Analog Value by which X is divided (denominator)
Transmitter - - - - Analog
The filtered result of the calculation (X ÷ Y) plus the off-
set
Function
To divide one input by another, set Function to Ratio.
Offset
Adjustment added to the result of the calculation.
Range: -99,999.000 to 99,999.000
Filter
Set the amount of filtering to apply. Filtering smooths signal fluctuations. Increase the time to
increase filtering. Excessive filtering slows the function’s response.
Range: 0.0 to 60.0 seconds
Add
This function sums up to four inputs. Only inputs connected to a source are used in the calcu-
lation. A filter and offset may be applied to the calculated value. If any input is an absolute
temperature, the output is also an absolute temperature; otherwise the output’s units are
those of the signal connected to the top input.
Signals
Direction
Label Type Function
Receivers
- - - - Analog Value to be summed
- - - - Analog Value to be summed
- - - - Analog Value to be summed
- - - - Analog Value to be summed
Transmitter - - - - Analog The filtered sum of the inputs plus the offset

Watlow F4T Specifications

General

Inputs	Thermocouple, RTD, mA, V
Outputs	Relay, SSR, mA, V
Communication	Ethernet, Modbus RTU
Data Logging	Yes
Certifications	CE, UL, cUL, RoHS
Control Modes	PID, On/Off
Power Supply	100 to 240 VAC
Operating Temperature	0 to 50°C
Enclosure Rating	IP65
Display	4.3 in. (109 mm) color touch panel LCD
Control Loops	Up to 4