Descriptions of functions
10.7 EtherNet/IP
SINAMICS DCM DC Converter
Operating Instructions, 12/2018, A5E34763375A
527
10.7.2.2
Communication with the SINAMICS DCM
The Ethernet/IP communication with the SINAMICS DCM is possible with two CIP types:
●
IMPLICIT: For cyclic I/O data (setpoints, actual values, control and status words)
●
EXPLICIT: For acyclic message requests ("explicit messaging")
The following CIP / messaging classes are available for the SINAMICS DCM:
Class code (hex)
Class code
Object name
0x01
1
Identity object
0x04
4
Assembly object
0x06
6
Connection Manager object
0x32C*
7
Drive object
0x401 - 0x43E
1025 - 1086
Parameter object (reading/writing a single
parameter value)
Implicit messaging – Cyclic communication as I/O slave
The cyclic communication is represented by Class 4 and the assembly object structure.
As standard, the SINAMICS DCM as I/O slave exchanges cyclic process data (PZDs) with a
PLC or another control system.
Process data is the cyclic information such as control and status words as well as actual
values and setpoints.
The following I/O assembly settings are to be made (from PLC perspective).
4 ms is supported as the minimum value for RPI (Requested Packet Interval).
Assembly 101 – Receive data:
Length depends on the user settings
Assembly 102 – Send data:
Length depends on the user settings
Assembly 103 – Configuration data:
Length 0 bytes
16-bit integer is used as the data type.
The data length is the sum of the number of words transferred from each drive object.
Example 1:
DO
Number of words to be sent
Number of words to be received
DC_CTRL (drive)
10
10
CU
2
2
Sum = length
12 words = 24 bytes
12 words = 24 bytes
