CP143 TCP/IP firmware
CP143
H1 / TCP/IP manual
4-14
Rev. 00/07
4.3 CP143 TCP/IP firmware
Fig. 4-5 shows the structure of the CP143 TCP/IP firmware. This figure contains those components
that interact to provide the functionality of the CP.
4.3.1 Components
The individual components communicate via the operating system functions of a real-time kernel
(RTK). In addition to this, class libraries have been defined which provide a defined CALL
interface.
4.3.1.1 Interface
The interface between the PLC and the CP is provided by a dual-port-RAM that has been divided
into four equal segments, so-called tiles. In a multi-processor PLC every CPU may communicate
independently with the CP143 TCP/IP by means of one of these four tiles.
The handler modules send-request and receive-request have been implemented by the use of
interrupts (interrupt handler) and by exchanging data via the dual-port-Ram.
4.3.1.2 TCP/IP application
The TCP/IP-application is the protocol controller for the functions defined for the CP.
4.3.1.3 TCP/IP-Interface
The TCP/IP-API-calls are available as a class library and they define the interface for the protocol
stack.
Содержание CP143 TCP/IP
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