Flexible System Controller

The FSC-120 is a general purpose programmable logic controller that is programmed with Function Block logic. A single FSC can be used to control a process, or multiple FSC’s can be networked together for coordinated distributed control.

Features
Node Net Operation
Easy Programmability
Address Selection
Modbus RS-485 Communication

Advantages
Reduced Field Wiring
Reduced Per Project Programming
Color Touchscreen HMI
Building Automation System Interface

Used in:
Automatic Fuel Oil Transfer Pump Set
Waterproof Light Oil Pump And Motor Assemblies
Fuel Oil Transfer Pump and Day Tank Set

  • Overview and Features
  • Application
  • Documents
Overview and Features

The FSC-120 is a general purpose programmable logic controller that is programmed with function block logic. A single FSC can be used to control a single device or process, or multiple FSC’s can be networked together for coordinated distributed control of larger systems.

A single FSC controller, or node, contains:
24 Digital Inputs
10 Relay Outputs
8 Analog Inputs
3 Analog Outputs

Up to ten FSC nodes can be linked together using the hardened, redundant, isolated, masterless Preferred NodeNet communication network. Both networks communicate continuously. If one network goes down (broken wire, shorted terminal, etc.) the other network communicates with no loss of function. Additionally, if any node fails, all other nodes continue to function.

Network communication between nodes eliminates the need to run numerous line and low voltage wires between devices or control panels.

Each FSC node can be equipped with a four inch color touchscreen HMI for setup and operator interface.

 

Node Net Operation
The FSC has redundant NodeNet Communication Ports (A & B) that continuously communicate between all FSC controllers wired in parallel (up to 10 FSC’s maximum). All of the information from all of the FSC’s will travel through both cables to all of the nodes. Both cables are always active and are electrically isolated at each node.

Easy Programmability
The FSC features a USB programming port for writing configurations to the controller with the FSC Edit software. The FSC can also be programmed using the available SD card slot (no laptop required).

Address Selection
The FSC has a 10 position address dial which can manually address each FSC. To select an address, turn the dial until the arrow is pointing to the address to be used. The first FSC in line shall always be set at address zero (factory default), and addresses must be in consecutive order without skipping numbers.

Modbus RS-485 Communication
The FSC communicates to the OIT the messages and statuses of the FSC via RS-485. Additionally, the FSC controller can communicate via Modbus to building automation systems or energy management systems.

Application

The most common application of the FSC is to monitor and control emergency
generator fuel oil supply pumping and storage systems.
Applications include:

  • Duplex transfer pumping skids
  • Day tank level control
  • Distribution piping Leak Detection
  • Multiple Main Tank motorized selector valve control
  • Main Tank filtration, water separation, and chemical injection
  • Tank truck off-loading pumps
  • Boiler burner oil pumping skids

Instruction Manual Scope:
This manual describes the FSC-120 controller hardware.
The application specific control logic is described elsewhere.
The FSC_Draw personal computer based logic creation/editing software
is described elsewhere.

Documents

Flexible System Controller (FSC) Specification

Flexible System Controller (FSC) Cutsheet

FSC Draw Program

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