|  Overview:
MODBUS
TCP/IP allows the widely used MODBUS protocol to be used over ETHERNET
TCP/IP networks. For Trio users it provides an simple effective
means of transmitting data between a suitable PLC, or PC, and an
MC206, MC224 or Euro205x fitted with an Ethernet daughter board.
Requirements:
MC206X, MC224 or Euro205x Motion Coordinator
System software version
1.6204 or higher
Ethernet daughter board with firmware version 1.0.3.1
or higher.
Modbus
Features Supported:
The
Ethernet Daughter Board listens on the MODBUS port (502), and will
read/write directly from/to the Trio VR global variables when the
MODBUS holding register functions are used,
or read/write from the
Trio IO when the coil & input status functions are used.
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1
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Read
Input Status (reads Trio IO) |
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2
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Read
Coil Status (reads Trio IO) |
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3
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Read
Holding Registers (read Trio global VR variables) |
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5
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Force
Single Coil (write to a Trio Output) |
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6
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Set
Single Holding Register (write to a Trio global VR variable)
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16
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Set
Multiple Holding Registers (write to multiple Trio global
VR variables) |
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Data
can be transferred to/from the global variables in 16 bit signed
integer or 32 bit signed floating point values. Although it should
be borne in mind that floating point formats are not specified by
MODBUS and it is down to each manufacturer how the support is implemented.
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