Watlow F4T User Manual

Watlow F4T • 121 • Chapter 5 Function Reference
Ramp Scale
Choose the time units for the Ramp Rate parameter.
Options:
• Minutes
• Hours
Ramp Rate
Set how quickly the set point ramps. Set the time units for the rate with Ramp Scale.
Range: 0 to 99,999 ºF or units / minute or hour
0 to 55,555 ºC
Idle Set Point
Set a set point value that is triggered when an event signal to the IDLE receiver is active. See
Use Idle Set Point Active Level below.
Range: Minimum Set Point to Maximum Set Point
Use Idle Set Point Active Level
Choose the signal value at the IDLE receiver which causes the loop to use the Idle Set Point.
Options:
• High: the idle set point is used when the signal is on
• Low: the idle set point is used when the signal is off
Remote Set Point
Choose whether or not the loop controls at the remote set point. The remote set point is re-
ceived on the control loop’s RSP input.
Options:
• No: the loop does not use the remote set point for control
• Yes: the loop uses the remote set point for control
Note:
Either the Remote Set Point parameter or the REN input can cause the remote set point
to override the loop’s set point.
Remote Set Point Type
Choose whether the remote set point received at input RSP overrides the Manual Power or
the Set Point when the remote set point feature is enabled by either the Remote Set Point
parameter or the REN input.
Options:
• Manual: the remote set point is in percent power where -100% is full cooling, 0% is no
output and 100% is full heating and overrides the Manual Power when enabled
• Auto: the remote set point is in the units of the PV input and overrides the Set Point
when enabled

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