Watlow F4T User Manual

Watlow F4T • 164 • Chapter 5 Function Reference
Signals
Direction
Label Type Function
Receivers
X Analog Value from which Y is subtracted
Y Analog Value subtracted from X
Transmitter - - - - Analog
The filtered result of the absolute value of (X – Y) plus the
offset
Function
To calculate the absolute value of one input subtracted from another, set Function to Absolute
Difference
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
Minimum
This function selects the minimum 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 minimum 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 lowest value of the inputs plus the offset
Function
To output the lowest of up to four inputs, set Function to Minimum.
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