Function and data blocks for SIEMENS S7 Page 71
PROFIBUS-Manual Servo positioning controller DIS-2 48/10 FB Version 2.0
13 Function and data blocks for
SIEMENS S7
13.1 Overview
Special function blocks have been written for DIS-2 48/10 FB servo positioning controllers and
Siemens PLC systems (SIMATIC-S7 control systems). These functions blocks facilitate the integration
of the servo positioning controllers into a PLC program with PROFIBUS functionality. The various
function and data blocks (FD, DB) are assigned to one of the operating modes.
To make the use of the function blocks clearer, example programs were written.
This chapter is intended to familiarise the user quickly with the functions of the inputs and
outputs and the use of the FBs and DBs within the S7 environment. However, this
chapter does not replace the previous chapters of the PROFIBUS-DP Product
Manual.
The available example programs are only examples and explain the fundamental methods for using
the function and data blocks.
When the example programs are used in customer-specific applications, the user has to check
whether all function- and safety-relevant requirements have been fulfilled.
Information
Specific function and data blocks have been developed for the DIS-2 48/10 FB servo
positioning controllers. These function and data blocks are integrated in example
programs and can be downloaded free of charge under www.metronix.de.
If one switches between the operating modes, one also has to switch between two function blocks. If
the controller enabling shall remain active during switching between two function blocks, it might be
necessary to modify the function blocks accordingly. Please contact the technical support department.
Attention
To switch from one operating mode to another, the current FB has to be deactivated and
an FB of another operating mode has to be activated. As a result, the controller enabling
might be deactivated.
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