Watlow F4T • 212 • Chapter 5 Function Reference
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
Resistance Temperature Device (RTD) 100 and 1000 Ohm
Use this block to condition a temperature measurement made with an RTD. This FB is found
on the canvas of the FB diagram. The number of these FBs that are available depends on the
number of flex modules with Universal Inputs installed and configured as an RTD with two or
three wires.
The module number shown on the block is the number of the controller’s slot that houses the
flex module with the universal input. The Universal Input number indicates the specific input
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 input device.
Options: RTD 100 Ohm, RTD 1000 Ohm
RTD Leads
Set the number of sensor leads connected to the flex module.
Options: 2, 3
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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