TSXP673 - Interface Processor - TELEMECANIQUE

The TSX AEM analog input modules form part of the TSX Series 7 range of intelligent I/O modules. These modules are pre-programmed to perform complete processing tasks, such as measurement, communication, positioning, etc., in applications using the TSX 47-20(*), TSX 47-30, TSX 67 or TSX 87 programmable controllers.

These modules incorporate a processor and specialized software which enable them to process the required function independently of the PLC processor. The data exchanges between the PLC and an intelligent I/O module are ensured by with the PLC the full I/O bus interface, which comprises:

• A Discrete interface, which is identical to the interface of the discrete I/O modules and is used to exchange bits (control, monitoring or fault bits). These bits are systematically updated on each scan cycle.

• A Register interface, which is used to exchange words during each scan cycle.
These words are used to transmit commands or to monitor the operation of the module. Their addresses depend on the location of the module in the rack.

Example: for a module in rack 2 and located in slot number 3 of this rack:
• IW23,0 is an input register word,
• OW23,5 is an output register word.
• A Message interface, which is used to exchange word tables. These exchanges are initiated by the user program using Text Blocks. The word tables are used to transmit the specific configuration to the module (number of channels used, etc.), and also for the exchange of large amounts of data.

The use of intelligent I/O modules simplifies the user program and reduces the scan time of the PLC, since the specific function of the module is entirely pre-programmed and is processed independently of the PLC processor and the program scan. The user program simply has to command the module and monitor its operation through the bits, words and function blocks mentioned above, which are common to all PL7-2 and PL7-3 programming languages (Ladder, Literal and Grafcet).