ProSoft Technology PLX8X-MNET-61850 - Manual (Page 51)

PLX8x-MNET-61850 ♦ Communication Gateway ProSoft 61850 Configuration Manager
Modbus TCP/IP to IEC 61850 User Manual
ProSoft Technology, Inc. Page 51 of 228
May 14, 2014
PLC Map View
Right-click on the Quantum, Premium, or M340 icon and choose PLC M AP V IEW .
The Map View window gives you information about all of the tags mapped to this
PLC. The fields are:
 Direction
 PLC Start MB Address
 PLX Start MB Address
 Tag Name
 Size
From this window, you can E XPORT THE P ROCESSOR F ILES or P RINT this list.
D IRECTION : This shows "MNET" with an arrow. It indicates in which direction the
data will move.

"MNET →", indicates the data is moving from the gateway’s MNET Client to a
remote Modbus TCP/IP server device (usually a Modicon PLC or PAC). This
is IEC 61850 data being read from the IED and pushed from the gateway to
the Modbus device.
 "MNET ←" indicates the data is moving from a remote Modbus TCP/IP Client
device to the gateway’s MNET server. This is mapped to IEC 61850 writable
data. The Modbus device (usually a Modicon PLC or PAC) writes the data to
the gateway, and the gateway writes it to the IED.
PLC S TART MB A DDRESS : This is the PLC address in the PLC that this data will
reside. This is derived, and based upon the address configured in the "Modbus
TCP/IP Device Configuration" window, PLC Read Start Register (%MW) or PLC
Write Start Register (%MW) field. In Unity Pro addressing, "%MW1" means the
same as Modbus 40,001 or 400,001 in common Modbus addressing.