Modbus address table
A range of maximum 64 kB is allowed for the access via Modbus to the addressable flag area (%M area). Thus, the complete address range 0000hex up to 7FFFhex is available for Modbus.
The availability of the segments depends on the CPU. The size of the %M area can be found in the technical data of the CPUs and in the target system settings.
Inputs and outputs cannot be directly accessed using Modbus.
Following values apply:
|
PM5012-x-ETH |
PM5032-x-ETH |
PM5052-x-ETH |
PM5072-T-2ETH(W) |
PM5082-T-2ETH |
|
|---|---|---|---|---|---|
|
Size of the %M area |
4 kB |
16 kB |
16 kB |
64 kB |
64 kB |
|
Modbus address range (Word accesses) |
|||||
|
HEX |
0000 … 07FF |
0000 … 1FFF |
0000 … 1FFF |
0000 … 7FFF |
0000 … 7FFF |
|
DEC |
0000 … 2047 |
0000 … 8191 |
0000 … 8191 |
0000 … 32767 |
0000 … 32767 |
|
Byte |
%MB0 … %MB4097 |
%MB0 … %MB16382 |
%MB0 … %MB16382 |
%MB0 … %MB65534 |
%MB0 … %MB65534 |
|
Word |
%MW0 … %MW2047 |
%MW0 … %MW8191 |
%MW0 … %MW8191 |
%MW0 … %MW32767 |
%MW0 … %MW32767 |