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Data read or written is saved in the destination device in registers
identified by a specific ModBus address (variable from 1 to
65535). Each ModBus address can correspond to a register (word
area of memory) or a single bit of a register (particular bit of an
area of memory).
Refer to the following figure for the list of possible operations in a
ModBus communication: reading and writing of a word or bit,
single or multiple.
9.2.1 ModBus RTU Master
The protocol ModBus Master can be configured only for the port
EXP1.
With this configuration the TD240 will have control of the transit of
the data of the corresponding port. For each of the two ports, there
can be active up to 256 frames (active packets) at the same time.
Each frame corresponds to an instruction of direct communication:
Summary of Contents for TD240 series
Page 1: ...Manuale operatore...
Page 2: ...2...
Page 6: ...6 3 Mechanical dimensions and installation...
Page 24: ...24 7 1 Starter Kit Connection of the terminal to the PC...
Page 27: ...27 7 2 1 Creation of a new project...
Page 89: ...89 11 Notes Updates...
Page 90: ...90...
Page 91: ...91...