A program including configuration data, symbols, and documentation.
(controller area network) A protocol (ISO 11898) for serial bus networks, designed for the interconnection of smart devices (from multiple manufacturers) in smart systems and for real-time industrial applications. Originally developed for use in automobiles, CAN is now used in a variety of industrial automation control environments.
A network containing logic controllers, SCADA systems, PCs, HMI, switches, ...
Two kinds of topologies are supported:
oflat: all modules and devices in this network belong to same subnet.
o2 levels: the network is split into an operation network and an inter-controller network.
These two networks can be physically independent, but are generally linked by a routing device.
(device type manager) Classified into 2 categories:
oDevice DTMs connect to the field device configuration components.
oCommDTMs connect to the software communication components.
The DTM provides a unified structure for accessing device parameters and configuring, operating, and diagnosing the devices. DTMs can range from a simple graphical user interface for setting device parameters to a highly sophisticated application capable of performing complex real-time calculations for diagnosis and maintenance purposes.
(field device tool) The specification describing the standardized data exchange between the devices and control system or engineering or asset management tools.
A programming unit that has 1 input and returns 1 immediate result. However, unlike FBs, it is directly called with its name (as opposed to through an instance), has no persistent state from one call to the next and can be used as an operand in other programming expressions.
Examples: boolean (AND) operators, calculations, conversions (BYTE_TO_INT)
(input/output)
(identifier/identification)
(international electrotechnical commission) A non-profit and non-governmental international standards organization that prepares and publishes international standards for electrical, electronic, and related technologies.
The protocol that allows communications between many devices connected to the same network.
(Modbus serial line) The implementation of the protocol over a RS-232 or RS-485 serial connection.
(millisecond)
(network management) CANopen protocols that provide services for network initialization, detected error control, and device status control.
(optimized terminal block) Used in the context of STB I/O distributed modules.
(process data object) An unconfirmed broadcast message or sent from a producer device to a consumer device in a CAN-based network. The transmit PDO from the producer device has a specific identifier that corresponds to the receive PDO of the consumer devices.
A convention or standard definition that controls or enables the connection, communication, and data transfer between 2 computing system and devices.
(receive process data object) An unconfirmed broadcast message or sent from a producer device to a consumer device in a CAN-based network. The transmit PDO from the producer device has a specific identifier that corresponds to the receive PDO of the consumer devices.
A command that causes the controller to scan the application program, read the physical inputs, and write to the physical outputs according to solution of the logic of the program.
A function that includes:
oreading inputs and placing the values in memory
oexecuting the application program 1 instruction at a time and storing the results in memory
ousing the results to update outputs
(service data object) A message used by the field bus master to access (read/write) the object directories of network nodes in CAN-based networks. SDO types include service SDOs (SSDOs) and client SDOs (CSDOs).
(transmit process data object) An unconfirmed broadcast message or sent from a producer device to a consumer device in a CAN-based network. The transmit PDO from the producer device has a specific identifier that corresponds to the receive PDO of the consumer devices.
