Tcutilitiesbc9000 - Beckhoff BC9000 Documentation

Bus terminal controller for ethernet

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Programming

TwinCAT PLC Library: Utilities BC

The library contains useful function blocks for the Bus Terminal Controller (BCxxxx). In addition to the RTC

blocks, the library contains a function block for decoding the DCF-77 time signal, along with a number of

conversion functions. Internally, the Bus Terminal controller's system functions are called.

TwinCAT PLC Library: Helper BC

The PlcHelper.lb6 library contains a number of functions which provide direct access to memory areas in the

Bus Terminal Controller's (BCxxxx) PLC runtime system.

TwinCAT PLC Library: ADS BC

The library contains function blocks for acyclic client-server communication between a BC9xxx Bus Terminal

Controller and other ADS devices in the network. The way in which these function blocks operate is not

significantly different from that for the PLC runtime system on the PC.

TwinCAT PLC Library: Event driven BC transmission blocks

The present function blocks simplify event-driven data exchange between the Bus Terminal Controllers and/

or other ADS devices (TwinCAT NC, Bus Terminal Controllers, ...).

The FB_WriteXXXOnDelta() function blocks implement a write procedure when the input signal rises above

or falls below a specified limit value. The frequency with which the input signal is examined can be set.

Event-driven data writing minimizes the loading on the fieldbus. If an error occurs during transmission, the

process is repeated until the connection is established once more. All data types supported in the TwinCAT

PLC are permitted as source and target variables. Symbol names are also supported.

Watchdog function blocks are available to monitor individual communication partners. The device that is to

be monitored cyclically transmits an incrementing counter. A check is made at the receiver to see that the

counter state changes within a specific time.

TwinCAT PLC Library: ModbusTCP BC

The library contains function blocks that permit the exchange of data between the Bus Terminal Controller

(BC9xxx) and a remote partner on the MODBUS/TCP port.

TwinCAT PLC Library: SMTP BC

The library contains useful function blocks for the Bus Terminal Controller (BC9xxx) for use of the SMTP

protocol (Simple Mail Transfer Protocol).

6.9.2