Operation Manual EMGZ490A
30.08.2019
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7
PROFINET Communication
With the acyclic data exchange one can set parameters, configure or read status
information. This is accomplished with Read-/Write-frames via standard IT services
using UDP / IP.
7.1
General Function
The Read-/Write-instructions can be triggered if a connection between controller and IO-
device was established; say a "Connect" was done.
Fig. 5: Read- / Write-cycle
The computer with the corresponding application can now request a read or write cycle
to the data model of the controller. The controller will execute the read-/write-
instruction via PROFINET and send back the status or the data to the computer.
7.2
Services and Protocols
The EMGZ490A is certified in accordance with the PROFINET standard version 2.2
Conformance Class B and can be loaded according to PROFINET Netload Test1, Netload-
Class 1.
The following services and protocols are used:
•
PROFINET IO with RT communication
•
Cyclic I/O
•
Parameters
•
Network diagnostics via IP (SNMP)
•
Topology information (LLDP) with LLDP-MIB
Likewise, all other services which are required for PROFINET are admitted. In addition,
other services may be used, provided that they do not exceed the network load for
normal operation specified in Netload Class 1.
