PLX51-PBM Setup
PROFIBUS DPV0/DPV1 Master or Slave to EtherNet/IP™ or Modbus® Gateway User Manual
ProSoft Technology, Inc. Page 94 of 196
3.12.2 DPV1 Class 2 Initialize
To perform a DPV1 Class 2 Read/Write, a DPV1 Class 2 Initialize message must first
be sent to the DPV1 Slave to begin the communication connection. The PLX51-PBM
Add-On Instruction (AOI) handles the source/destination address information of the
Initialization request. A detailed description of how the AOI controls the
source/destination address information of the DPV1 Class 2 Initialize request is
provided below. Please see PROFIBUS DP - Master on page 102 for more
information on the DPV1 Class 2 Initialization Request parameters.
Overview
A DPV1 Class 2 Initialize (Init) request can be sent with or without additional source
or destination address information. The additional address information includes the
optional Network/MAC address. The parameters Source Type and Destination Type
indicate the presence of the optional Network/MAC address. The DPV1 Class 2 Init
request UDT provides 6 bytes for the Network address and 10 bytes for the MAC
address, for both the Source and Destination. The Source/Destination Address
Length must represent the total length of the Source/Destination address information
sent within the DPV1 Class 2 Init request.
Source Type = 0 & Destination Type = 0
The Controller Tags for the DPV1 Class 2 Init request are populated with default
values. The Source Type (Source_Type) and Destination Type (Dest_Type) are both
set to 0. Therefore, the Init request will be sent without the optional
Source/Destination Network and MAC Address information.
Figure 3.113 – DPV1 Class 2 Init Request Default Values
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