Siemens SINAMICS S120 - Example 1: Read Parameters

Communication
11.1 Communication according to PROFIdrive
Drive functions
760 Function Manual, 11/2017, 6SL3097-4AB00-0BP5
11.1.4.4
Example 1: read parameters
Requirements
● The PROFIdrive controller has been commissioned and is fully operational.
● PROFIdrive communication between the controller and the device is operational.
● The controller can read and write data sets in conformance with PROFINET/PROFIBUS.
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.
2. Invoke the request.
3. Evaluate the response.
Create the request
Parameter request
Offset
Request header
Request reference = 25 hex
Request ID = 01 hex
0 + 1
Axis = 02 hex
Number of parameters = 01 hex
2 + 3
Parameter address
Attribute = 10 hex
Number of elements = 08 hex
4 + 5
Parameter no. = 945 dec 6
Subindex = 0 dec
8
Information about the parameter request:
● Request reference:
The value is selected at random from the valid value range. The request reference
establishes the relationship between request and response.
● Request ID:
01 hex → This identifier is required for a read request.
● Axis:
02 hex → Drive 2, fault buffer with drive- and device-specific faults.
● Number of parameters:
01 hex → One parameter is read.
● Attribute:
10 hex → The parameter values are read.