Watlow F4T User Manual

Watlow F4T • 163 • Chapter 5 Function Reference
Function
To sum up to four inputs, set Function to Add.
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
Multiply
This function multiplies up to four inputs. Only inputs connected to a source are used in the
calculation. A filter and offset may be applied to the calculated value. If any input is an ab-
solute 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 multiplied
- - - - Analog Value to be multiplied
- - - - Analog Value to be multiplied
- - - - Analog Value to be multiplied
Transmitter - - - - Analog The filtered product of the inputs plus the offset
Function
To compute the product of up to four inputs, set Function to Multiply.
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
Absolute Difference
This function calculates the absolute value of input X minus input Y. A filter and offset may be
applied to the calculated value. The output has the units of input x.

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