A number of standard protocols are implemented and allow data exchange with a wide variety of stations:
ASCII: for linking to non-Siemens systems using simple communication protocols. e. g. protocols with start and end characters or protocols with block check characters. The handshake signals of the interface can be scanned and activated from the user program.
Printer driver: for logging process statuses and events to a printer
3964 (R): for connection to Siemens devices or components from third-party suppliers, via the standardized Siemens 3964 (R) protocol. Also implemented are a 3964(R) driver with default values and a programmable 3964(R) driver.
Parameterization
The CP 340 communications processor is particularly user-friendly and easy to parameterize:
The user specifies module characteristics by way of a parameter assignment tool integrated in STEP 7, e. g.:
which implemented protocol driver is to be used, or
which driver-specific features are to be utilized
Parameterization using the CPU: the PG is simply connected to the CPU. The configuration data is filed in a system data block that is saved in the CPU. When a module is replaced, the new module is thus immediately ready for operation.
Configuration package (on CD): with electronic manual, parameterization screen forms and standard function blocks for communications with the CP
