Siemens SINAMICS DCM Operating Instructions Manual page 497

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)
0x01
0x04
0x06
0x32C*
0x401 - 0x43E
"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:
Assembly 102 – send data:
Assembly 103 – configuration data:
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
DC_CTRL (drive)
CU
Sum = length
SINAMICS DCM Control Module
Operating Instructions, 12/2018, A5E34888669A
Class code
1
4
6
7
1025 - 1086
Length depends on the user settings
Length depends on the user settings
Length 0 bytes
Number of words to be sent
10
2
12 words = 24 bytes
Descriptions of functions
Object name
Identity object
Assembly object
Connection Manager object
Drive object
Parameter object (reading/writing a single
parameter value)
Number of words to be received
10
2
12 words = 24 bytes
10.7 EtherNet/IP
495