Siemens sinamics dcp - 7.8.3 Communication with the SINAMICS DCP; 7.8.3.1 Implicit messaging - cyclic communication as I;O slave

Operation
7.8 Communication via EtherNet/IP (EIP)
SINAMICS DCP
292 Operating Instructions, 09/2019, A5E34382853K
7.8.3 Communication with the SINAMICS DCP
The EtherNet/IP communication with SINAMICS DCP is possible using the following
connection types:
● Implicit (I/O) messaging
for cyclic I/O or process data (setpoints, actual values, control and status words)
● Explicit messaging
for acyclic message requirements
For communication via EtherNet/IP, SINAMICS DCP supports the following CIP objects:
Class code (hex)
Class code
Object name
001 hex
1
Identity Object
004 hex
4
Assembly Object
006 hex
6
Connection Manager Object
0F5 hex 245 TCP/IP Interface Object
1)
0F6 hex
246
Link Object
1)
32C hex 812 Siemens Drive Object
(reading and writing certain device parameters)
401 hex ... 43E hex 1025 - 1086 Parameter Object
(general reading and writing of device parame-
ters)
1)
These objects are part of the EtherNet/IP system management
The communication types and objects that are supported are described in more detail in the
following.
7.8.3.1 Implicit messaging – cyclic communication as I/O slave
Assembly Object (Class Code 4 hex) is used for cyclic communication.
As standard, the SINAMICS DCP as I/O slave exchanges cyclic process data (PZDs) with a
PLC or another control system.
Cyclic information, such as control words, status words, actual values and setpoints, are
called process data.
The following I/O assembly settings must be made (from the PLC perspective):
Assembly
Content
Description
101 Receive data Total length of the receive data in bytes (= 2x
number of receive PZD)
102 Send data Total length of the send data in bytes (= 2x num-
ber of send PZD)
103
Configuration data
Length 0 bytes
In addition, the cycle time of the data transfer - the RPI (Requested Packet Interval) - must
be additionally defined in the PLC. 4 ms is supported as the minimum value.
PZD are transferred as words (16 bit integer).