Specifications

SINEC L1 Section 4

The operating terminals allow for a simple connection to the Siemens S95 - S155

programmable controllers thus making the operating terminals the perfect man-

machine-interface for your Siemens PLC.

With the programmable controllers 95U, 100U (CPU 103) and 155U, the operating

terminal can be connected to the PU interface of the PLC. An additional communi-

cations module is not necessary.

With the programmable controllers 115U, 135U and 155U, a connection is possible

via a CP530 communications processor.

In either case, the operating terminal is the master of the bus.

The software components of the system are fully adapted to the parameters and

marginal conditions of the SINEC L1 protocol.

This offers the user the following advantages:

- Random write and read access to any data within the PLC. Data of existing PLC

programs can be displayed and modiﬁed directly in the operating terminal. It is

not necessary to adapt the PLC program to the operating terminal in any re-

spect, since it is not required that communications data be stored in a speciﬁed

address area or data type area.

- The operating terminal automatically polls the freely deﬁnable data areas for

cyclic data.

- Use of a PU multiplexer allows simultaneous connection of the operating termi-

nal and a hand-held programming unit (PU).

- Only a minimum of conﬁguration is required for the installation of the supplied

function blocks into the PLC.

- Minimal increase of the cycle time of the PLC.

- The protocol provides error control. Transmission errors are detected and, if

possible, eliminated by repeating the transmission. A noise-immune interface

hardware in accordance with the 20 mA current loop interface standard permits

the application even in a harsh industrial environment.

- The parameters of the interface SER1 are assigned in the programming soft-

ware in a protocol-speciﬁc manner and are stored in the application description.

Modifying of the parameters is possible in the setup mask or in each other I/O-

mask of the terminal at any time.

- The programming system provides a maximum of support to the operator in

programming the operating terminal. The deﬁnitions (abbreviations) used here

are identical with the deﬁnitions used within the PLC program.