Process Controllers

General Information

Introduction

The F120 single loop controller and F124 ratio controller are part of the Fluidwell process controller family and has been designed to offer outstanding control performance and provide a reliable solution for a wide variety of control applications; such as in chemical processing, plastic manufacturing and the aggregates and cement industry. Both controllers accept most inputs from flowmeters and have a 4 - 20mA output for controlling a valve or pump.

There is a bumpless transfer between the control modes. Another important feature is the safety mode, where a contact input closure will set the control output to a predetermined safety value. After releasing the contact, the former value and function will be reinstalled.

The F-series product range is the alternative for local control loops!

Functions

The following features are available in het process controller models range. A more detailed description of each controller and it’s typical features can be found in the products datasheet.

•

flow rate controller (single loop) / monitor - model F120

•

ratio controller (cascade A/B) / monitor - model F124

•

level / pump controller - model F074

Configuration menu

All configuration settings are accessed via a simple operator menu which can be passcode protected to prevent unauthorized access. Each setting is clearly indicated with an alphanumerical description, therefore avoiding confusing abbreviations and baffling codes. There are no sensitive DIP-switches or trimmers, you simply select "Flowmeter" as main function, after which you can select "NPN pulse" or "span" etc. Once familiar with one F-Series product, you will be able to program all models in the series without a manual. All settings are safely stored in EEPROM memory. The clear and easy structured configuration menu is one of the most appreciated features of the F-Series.

Signal input type

For the process controllers, there is currently only one signal input type available:

•

Pulse signals for flow measurement: sine wave (coil) low sensitivity (80mVp-p), sine wave high sensitivity (20mVp-p), Namur, NPN, PNP, reed-switch or active pulses. For most signals a low pass filter can be enabled to ignore pulse bounce. The sine wave input can even be supplied with 10mV or 5mVp-p sensitivity (option ZF and ZG).

•

Analog signal (0)4 – 20mA for flow measurement. The input signal can be tuned within this range (e.g. from 4.0mA to 10.0mA). To avoid incorrect signal processing at minimum signal, a low cut-off filter is available.

•

Analog signal: 0 – 10V DC. The input signal can be tuned within this range (e.g. from 2.0 to 5.0V DC). A low cut-off filter is available here too, to avoid counting at minimum signal.

Data protection

All settings and totals are stored in EEPROM memory ensuring that no information is lost in the event of power failure or battery exchange.

On models containing totalizer functionality, to reset total, the CLEAR key must be pressed twice to avoid undesired initialization. Accumulated total cannot be reset to zero. The configuration menu and alarm values can be passcode protected to prevent unauthorized access.

Flow controllers

F120

Flow rate controller with analog control output and high / low alarms

Ratio controllers

F124

Ratio controller with analog control output and high / low alarms

Level controllers

F074

Level / pump controller with one control output