PLX3x Series ♦ Multi-Protocol Gateways MBS Protocol
User Manual
ProSoft Technology, Inc. Page 115 of 215
January 25, 2018
7 MBS Protocol
In This Chapter
MBS Functional Overview ................................................................... 115
MBS Configuration .............................................................................. 119
MBS Diagnostics ................................................................................. 127
MBS Reference ................................................................................... 134
7.1 MBS Functional Overview
You can use the the PLX3x gateway Modbus Serial (MBS) protocol for both
master and slave connections. Each of the gateway serial port(s) is individually
configurable to communicate to separate networks.
As a master, you can specify a command list of up to 100 entries. The
gateway stores the write command data in the gateway's lower memory. This
is also where the gateway stores data from read commands from other
devices. See MBS Internal Database (page 117) for more information.
As a slave, data in the lower memory of the gateway's internal database is
accessible for read and write operations by a remote Modbus master.
The following illustration shows the functionality of the Modbus TCP/IP protocol:
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