Siemens SINAMICS DCM - Basic Procedure

Descriptions of functions
10.3 Communication according to PROFIdrive
SINAMICS DCM DC Converter
450 Operating Instructions, 12/2018, A5E34763375A
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.
● Number of elements:
08 hex → The actual fault incident with eight faults is to be read.
● Parameter number:
945 dec → p0945 (fault code) is read.
● Subindex:
0 dec → Reading starts at index 0.
Initiate parameter request
If ZSW1.3 = "1" → Initiate parameter request.