9-67
ET 200U Distributed I/O Station
EWA 4NEB 812 6087–02b
The CP 521 BASIC communications module is a powerful I/O module with
its own central processor.
A separate manual is available for the CP 521 BASIC. It can be ordered un-
der the order number 6ES5 989–0UW21.
The following is an overview of the module’s mode of operation.
The CP 521 BASIC is available with a special COM software package which
is required for BASIC program generation and archiving (FLOPPY,
EPROM).
The implementation of a BASIC interpreter in the CP 521 BASIC enables
you to generate and run BASIC programmers which can exchange data with
the CPU and an I/O device connected. Programming of the BASIC interpre-
ter is carried out with a programmer via the COM software or at a terminal.
The BASIC programs are stored on a battery–backed RAM on the module or
on a memory submodule which can be plugged in.
The programmer or terminal is connected with the CP 521 BASIC via a serial
interface. A TTY current interface or a V.24 (RS 232C) voltage interface
(parameterizable) are available for a programmer or a terminal. To print out
listings or messages, connect a printer to the unidirectional V.24 (RS 232C)
interface of the module.
Parameterization (matching) of the I/O interface can be modified via a BA-
SIC command or in the BASIC program.
The module has an integrated real–time clock which can be backed up by a
battery if the module is de–energized. The clock data can be used, for exam-
ple, in the unidirectional data exchange for logging of process states and pro-
cess disturbances.
As other I/O modules, the CP 521 BASIC is mounted on the bus unit.
The module can be plugged in only at slots 0 to 7.
The module has no connection to the terminal block.
The printer is connected to the module with a 25–pin sub D connector.
The CP 521 BASIC is addressed like a 4–channel analog module.
Function
Installation
Addressing
Function Modules
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