Watlow F4T User Manual (English)

Other manuals for Watlow F4T

Questions and Answers:

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gonzalezjenniferSep 13, 2025
What does loop reversed error mean on my Watlow F4T?
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  Joseph HallSep 13, 2025
  A loop reversed error on your Watlow Controller may occur due to: * An incorrect setting of the Open Loop Detect Time. Set the correct Open Loop Detect Time for the application. * An incorrect setting of the Open Loop Detect Deviation. Set the correct Open Loop Deviation value for the application. * An output programmed for an incorrect function. Set the output function correctly. * A thermocouple sensor wired in reverse polarity. Wire the thermocouple correctly (red wire is negative).
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William ColemanAug 25, 2025
What to do if alarm won’t clear on Watlow Control Unit?
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  johnsonwilliamAug 25, 2025
  If your Watlow Control Unit's alarm won’t clear or reset, try the following: Reset the alarm when the process is within the specified range or disable latching. Ensure the output is set to the correct alarm source instance and the alarm source is set to the correct input instance. Correct any sensor input issues that are causing it to be out of the alarm range. Also, verify the alarm set point is at the correct trip point and that the alarm is set to the correct type (process, deviation, or power). Finally, check the digital input function and source instance.
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robertbarnesAug 25, 2025
What causes alarm error on Watlow Control Unit?
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  Jeffrey OrtizAug 26, 2025
  To resolve an 'Alarm Error' on your Watlow Control Unit, first check if the sensor is improperly wired or open. If so, correct the wiring or replace the sensor. Also, make sure the setting matches the sensor being used and check the calibration of the controller.
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robert39Aug 26, 2025
How to fix limit error on Watlow Control Unit?
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  Ethan NelsonAug 26, 2025
  To solve a 'Limit Error' on your Watlow Control Unit, check for improperly wired or open sensors and correct the wiring or replace the sensor. Ensure that the setting matches the sensor used and check the calibration of the controller.
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Kevin KnoxSep 14, 2025
Why are the menus inaccessible on my Watlow F4T?
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  ybennettSep 14, 2025
  Menus may be inaccessible on your Watlow Controller if: * Security is set to an incorrect level. Verify password accuracy. * Security is set to an incorrect level. Login using appropriate credentials.
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Chase ChanSep 16, 2025
Why process doesn’t control to set point on Watlow Control Unit?
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  Christopher McmahonSep 17, 2025
  To address a situation where the process doesn’t control to the set point on your Watlow Control Unit, you can perform autotuning or manually tune the system. Ensure that the control mode is appropriately set (Open vs Closed Loop). Also, verify that the control set point is correctly configured in the appropriate control mode, and check the set point source (remote, idle, profile, closed loop, open loop).
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Katherine WoodsSep 7, 2025
What does limit error mean on my Watlow Controller?
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  andreadeanSep 7, 2025
  A limit error on your Watlow Controller can be caused by: * A sensor improperly wired or open. Correct the wiring or replace the sensor. * An incorrect setting of the sensor type. Match the setting to the sensor used. * A corrupt calibration. Check the calibration of the controller.
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patrickhughesSep 8, 2025
What does alarm high mean on my Watlow Controller?
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  Troy ThompsonSep 8, 2025
  An alarm high on your Watlow Controller indicates: * The temperature is greater than the alarm set point. Check the cause of the over temperature. * The alarm is set to latching and an alarm occurred in the past. Clear the latched alarm. * The alarm set point is incorrect. Establish the correct alarm set point. * The alarm source is incorrect. Set the alarm source to the proper setting.
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Angela HorneAug 31, 2025
What to do if my Watlow Controller has no display?
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  Tina MaldonadoSep 1, 2025
  If your Watlow Controller has no display, there could be several reasons: * The power to the controller might be off, so turn the power on. * A fuse might be open, in which case you should replace the fuse. * The breaker might be tripped, so reset the breaker. * The safety interlock switch might be open, so close the interlock switch. * A separate system limit control might be activated, so reset the limit. * There may be a wiring error; correct the wiring issue. * The voltage to the controller may be incorrect; apply the correct voltage and check the part number.
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Luis JohnsonAug 30, 2025
How to fix loop reversed error on Watlow Control Unit?
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  Jessica LoweAug 30, 2025
  To correct a 'Loop Reversed Error' on your Watlow Control Unit, set the correct Open Loop Detect Time and Deviation value for your specific application. Ensure the output function is correctly set. Check the thermocouple wiring, making sure the red wire is connected to the negative terminal.

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