PROFIBUS DP

Access to process data

The CP 5614 A3 is operated as a PROFIBUS DP master and DP slave module that stores the process image (input/output and diagnostic data) in the dual-port RAM. High-performance data transfer to and from the PROFIBUS slaves is performed autonomously by the hardware of the CP 5614 A3. The user accesses the dual-port RAM directly.

The process data of the slaves is always consistent, i.e. the user receives the data of a slave from one and the same DP cycle.

Parallel operation of the HARDNET-PB DP software (DP master) and DP-Base software (DP master, DP slave) is not possible.

Example configuration of CP 5614 A3 as DP master and DP slave

Event filter mechanism

The user receives up-to-date data over two access mechanisms:

• Cyclic polling of the DP slaves (high loading for host CPU)
• Notification through event/filter mode on changing the input data of a slave (minimal loading for host CPU)

Both alternatives can be combined. This allows users to optimize use of the PC for their applications.

The event/filter mechanism can be used additionally for

• Notification by means of an interrupt of the diagnostic alarms from slaves
• During operation with constant bus cycle time, signaling by means of interrupt:
  • Start DP cycle
  • End cyclic data communication with DP slaves

FastLogic

FastLogic means that the CP 5614 A3 can react autonomously to 4 plant statuses. This results in a short response time and independence from the host application, e.g. fast shutdown of devices.

DP programming interface

The DP master programming interfaces of the CP 5613 A3 and CP 5614 A3 are identical.

The DP programming interface of the CP 5614 A3 features the following functions:

• DP slave
• DP master Class 1 including acyclic DP expansions
• DP master Class 2 including acyclic DP expansions

The process data is accessed directly through the dual-port RAM. The DP RAM interface not only offers fast access as DP master/slave but also a basis for porting to other operating system environments (e.g. VXWorks, QNX, RMOS, RTX).

Administrative function calls (initialization and management services as well as diagnostic functions) are provided through a DP master and DP slave library (DP_BASE.DLL and DPS_BASE.DLL).

A transfer mechanism (PC application) can be activated in the software as a linking component for data transfer between the master and slave interface.

Defined I/O data can be transferred in this manner between the master interface and the slave interface.

The two connected PROFIBUS networks can be operated with different PROFIBUS bus parameters because they are independent of each other.

HARDNET-PB DP Development Kit

The HARDNET-PB DP Development Kit provides access to the functions DP master Class 1 and DP slave (incl. acyclic DP expansions)

The HARDNET-PB DP Development Kit is used to integrate the CP 5613 A3 and CP 5614 A3 communications processors into any operating system environment. The kit contains the necessary source code, including the descriptions in PDF format, and can be downloaded free of charge from the Internet.

Access to process data with HARDNET-PB DP

HARDNET-PB DP is available to permit compatibility with older applications that were created with the DP-Lib interface.

Parallel operation of the DP-Base and HARDNET-PB DP software is not possible.

Software for PG/OP communication

This software supports programming of the SIMATIC S7 controllers over PROFIBUS in combination with STEP 7. PG/OP communication is already available after the CP 5614 A3 (DP-Base) has been installed. No additional software packages are required.

Open communication (SEND/RECEIVE) based on the FDL interface

SEND/RECEIVE (FDL interface) is already available following installation of the CP 5614 A3 (DP-Base) and provides services for data transfer, diagnostics and management. No additional software packages are required.

Software for S7 communication (HARDNET-PB S7)

SIMATIC S7 system components communicate with each other using S7 communication functions. The S7 programming interface provides programming device/PC user programs with access to SIMATIC S7 system components. This provides easy, flexible access to the data of the SIMATIC S7 controller.

The following services are available with S7 communication:

Administrative services

• Connection management
• Mini database
• Trace

Data transfer services

• Read/write variables
• BSEND/BRECEIVE (up to 64 KB per task)

User interfaces

• OPC interface

The OPC server included in the respective software package can be used as the standard programming interface for the PROFIBUS DP (DP master and DP slave), open communication, S7 communication and PROFIBUS FMS protocols for linking automation technology applications to OPC-capable Windows applications (Office, HMI systems, etc.).

Configuration

• The S7 communication, open communication, DP protocol (DP-V0/DP-V1/DP-V2) protocols are configured in STEP 7 or NCM PC.
• A configuration tool is included in the scope of delivery of the PROFIBUS software packages.

Diagnostics

Comprehensive diagnostic tools are available (for installation, start-up and operation) for the module itself and for the PROFIBUS DP network. These tools can be used for quick and easy start-up of a PROFIBUS DP network with a CP 5614 A3.

Configuration example for CP 5614 A3