Watlow F4T User Manual

Watlow F4T • 165 • Chapter 5 Function Reference
Maximum
This function selects the maximum of up to four inputs. Only inputs connected to a source
are considered. A filter and offset may be applied to the output. The output has the units of
the signal with the maximum value.
Signals
Direction
Label Type Function
Receivers
- - - - Analog Compared with other inputs
- - - - Analog Compared with other inputs
- - - - Analog Compared with other inputs
- - - - Analog Compared with other inputs
Transmitter - - - - Analog The filtered greatest value of the inputs plus the offset
Function
To output the greatest of up to four inputs, set Function to Maximum.
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
Square Root
This function calculates the square root of input X. A filter and offset may be applied to the
calculated value. The output has the same units as X.
Signals
Direction
Label Type Function
Receiver
X Analog Value of which to find the square root
Transmitter - - - - Analog The filtered square root of input X plus the offset
Function
To calculate the square root of an input, set Function to Square Root.
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

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