Reading and Writing Device Data
The following tables show how to generally access data of the devices connected to port one to port four of the
length of the input and output data telegrams from it.
The tables in this document show the mapping of the most common input, output and diagnosis data, that can be accessed
very fast with one single read or write command.
In the following tables the same data types are shown in the same color for an easier identification.
Individual data access by device
This method makes it possible to individually access data from a connected device via single registers or groups of registers
organized in words.
Address for data access to device
connected to port
Data Length Access
1 2 3 4
Diagnosis data of
connected device
Read
Digital Inputs (DI)
Read
Write, Read
Analog Inputs (AI) Read
Write, Read
*) Actual number of registers (length) depends on the connected device.
The following table shows the data which can be accessed using bit access requests.
Address for data access to device
connected to port
Data Length Access
1 2 3 4
Digital Inputs (DI)
bitwise access
Read Coils,
Read Multiple Coils
Write Coils,
Write Multiple Coils
Read Coils,
Read Multiple Coils
*) Actual number of bits depends on the connected device.
19 UNIVERSAL MOTOR CONTROLLER UMC100.3 | MTQ22-FBP.0 MODBUS TCP MANUAL
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