Efficient Networks S120 Determining the drive object numbers, Task description, Basic procedure

Communication PROFIBUS DP/PROFINET IO 10.1 Communications according to PROFIdrive

10.1.4.3Determining the drive object numbers

Further information about the drive system (e.g. drive object numbers) can be determined as follows using parameters p0101, r0102, and p0107/r0107:

1.The value of parameter r0102 ("Number of drive objects") for drive object/axis 1 is read via a read request.

Drive object 1 is the Control Unit (CU), which is a minimum requirement for each drive system.

2.Depending on the result of the initial read request, further read requests for drive object 1 are used to read the indices for parameter p0101 ("Drive object numbers"), as specified by parameter r0102.

Example:

If the number of drive objects is "5", the values for indices 0 to 4 for parameter p0101 are read. Of course, the relevant indexes can also be read at once.

Note

The first two points provide you with the following information:

•How many drive objects exist in the drive system?

•The numbers of the existing drive objects

3.Following this, parameter r0107/p0107 ("Drive object type") is read for each drive object/axis (indicated by the drive object number).

Depending on the drive object, parameter 107 can be either an adjustable or visualization parameter.

The value in parameter r0107/p0107 indicates the drive object type. The coding for the drive object type is specified in the parameter list.

4.From here, refer to the parameter list for each drive object.

10.1.4.4Example 1: read parameters

Prerequisites

1.The PROFIdrive controller has been commissioned and is fully operational.

2.PROFIdrive communication between the controller and the device is operational.

3.The controller can read and write data sets in conformance with PROFIdrive DPV1.

Task description

Following the occurrence of at least one fault (ZSW1.3 = "1") on drive 2 (also drive object number 2), the active fault codes must be read from the fault buffer r0945[0] ... r0945[7].

The request is to be handled using a request and response data block.

Basic procedure

1. Create a request to read the parameters.

Drive Functions	399
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4