Siemens SINAMICS S120, Function Manual

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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.