OVERVIEW
1.2.OVERVIEW
1.2.1.INTRODUCTION TO F650 AND F600 FAMILY OF RELAYS
This platform of relays has been designed to meet the goals that are appearing nowadays in the environment of new substations. Historically, protection, control and metering functions have been performed by electromechanical elements at the beginning, then static devices, and finally by digital equipment able to integrate all these functions in a single device, called IED (Intelligent Electronic Device).
Due to the huge number of signals to be controlled and monitored nowadays in a substation environment, there is a new need for a great number of digital inputs and outputs to retrieve states and to signal or perform all different operations. CIO units respond to this need, allowing connection to F650 and F600 IEDs, and increasing the number of available inputs and outputs depending on the connected equipment.
1.2.2. HARDWARE ARCHITECTURE
CIO units incorporate a series of interconnected modules to operate. These modules are a power supply and input/output boards.
BUS
CIO
Contact Inputs
Contact Outputs
FIGURE 1-3 HARDWARE ARCHITECTURE
As shown on the diagram above, Contact Inputs/Outputs are signals associated to physical input/output contacts in the relay, and their status is sent/received through the CAN BUS of the associated equipment, F600 or F650.
This CAN connection to the master unit can be made through fiber optic cable or through copper cable.
CIO units can incorporate up to two I/O boards, each of which must have a unique address in the system. For this purpose, there is a switch at the rear of the unit with 16 positions (0 to F), that allows indicating the address for board H. The address of board J is fixed to “board H address + 1”.
1.2.3. SOFTWARE ARCHITECTURE
Each I/O board includes a microprocessor that manages communication with the master unit, as well as sampling and activation of the corresponding inputs and outputs.
The firmware (software embedded in the boards) has been designed using object oriented programming techniques (ODD/OOP). These techniques are based on the use of objects and classes, and provide the software architecture with the same characteristics as the hardware architecture, i.e., modularity and flexibility.
CIO Remote CAN Digital I/O Module | 7 |
