PLX51-PBM
Operation
PROFIBUS DPV0/DPV1 Master or Slave to EtherNet/IP™ or Modbus® Gateway
User Manual
ProSoft Technology, Inc.
Page 140 of 196
Modbus Auxiliary Map
The Modbus Auxiliary Map can be used to read or write Modbus data from the local
PLX51-PBM to a remote Modbus Slave. This will be enabled when
Enable Modbus
Auxiliary Mapping
has been enabled in the Modbus tab and configured for Modbus
Master. Up to 20 Modbus Slaves can be connected and up to 200 mapped items can
be configured.
IMPORTANT: When Modbus Auxiliary Mapping is enabled, the automatic polling of referenced Modbus
registers is disabled. It is the user’s responsibility to ensure that all the required PROFIBUS control and
data registers are collected from the appropriate remote Modbus slave devices.
5.3
EtherNet/IP Explicit Messaging Operation
When the PLX51-PBM has been setup for EtherNet/IP Explicit Messaging
communication it will exchange data with remote EtherNet/IP devices using either
connected Class 3 messaging or Unconnected Messaging (UCMM). This will allow
the user to exchange data between a EtherNet/IP device and a Profibus DP Master.
IMPORTANT: EtherNet/IP Explicit Messaging is only allowed when the PLX51-PBM is operating as a
Profibus Slave.
The user can map up to 10Kbytes of EtherNet/IP data to the PLX51-PBM module
which can then be mapped to DPV0 communication data for any of the configured
DP Slaves.
Each EtherNet/IP device configured can also provide communication status which
can be mapped to DPV0 data to inform the DP Master that the PLX51-PBM (in slave
mode) has lost communication with a specific EtherNet/IP device. The user will need
to enter the location in the Data Table where the communication status for the device
can be found (as shown below).
Figure 5.18
– EtherNet/IP Explicit Messaging Communication Status
Communication Status per EtherNet/IP device
Bit 0 - (1) Device online / (0) Device offline.
Bit 1 to 7
– Reserved.
