Watlow F4T User Manual

Watlow F4T • 208 • 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
Off
When the Universal Input FB is set to Off, the output will have an indeterminate value.
Signals
Direction Label Type Function
Transmitter - - - - Analog No output when off.
Name
Uniquely identify this FB using up to 20 alphanumeric characters.
Sensor Type
To turn an input off, set Sensor Type to Off.
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 flex modules with universal inputs installed and configured as a
thermocouple.
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
To detect and condition a temperature measurement set Sensor Type to Thermocouple.

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