Watlow F4T • 193 • Chapter 5 Function Reference
Filter
Set the amount of filtering to apply to the input. Filtering smooths signal fluctuations. In-
crease the time to increase filtering. Excessive filtering slows the input’s response.
Range: 0.0 to 60.0 second
Input Error Latching
Set whether an input error persists until it is cleared or clears automatically when the sensor
signal returns to a normal level.
Options:
• Off: error clears automatically once the input returns to normal
• On: error remains active until the input returns to normal and the error is cleared by
the Clear Error parameter
Clear Error
Set this parameter to Clear to reset the input error after correcting the condition that caused
it.
Options: Ignore, Clear
Thermocouple
Use this block to condition a temperature measurement made with a thermocouple. This FB is
found on the canvas of the FB diagram. The number of these FBs that are available depends
on the number of installed flex modules with temperature inputs.
The module number shown on the block is the number of the controller’s slot that houses the
flex module with the temperature input. The Temperature In number indicates the specific in-
put on the flex module.
Signals
Direction Label Type Function
Transmitter - - - - Analog
Supplies scaled, absolute temperature ± the offset as a
connection to another FB.
Name
Uniquely identify this FB using up to 20 alphanumeric characters.
Sensor Type
Select the device used to measure temperature.
Options: Thermocouple
TC Linearization
Select the Thermocouple type.
Range: B,
K, C, N, D, R, E, S, F, T, J
Display Precision
Set how many decimal places are displayed for the process value and associated parameters
such as set points.
Options: Whole, Tenths, Hundredths, Thousandths
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