Comparison Of Modbus Tcp Addresses And Iec 61131-3 Addresses; Word Access - WAGO 750 Series Manual

78 • Fieldbus Controller 750-841
Data Exchange

3.1.6.6.2 Comparison of MODBUS TCP Addresses and IEC 61131-3 Addresses

3.1.6.6.2.1 Word Access

Method
FC3
- Read Multiple Register
FC4
– Read Holding Register
FC16
– Write Multiple Register
MODBUS Addresses
decimal hexadecimal
0... 0x0000 –
255 0x00FF
256... 0x0100 –
511 0x01FF
512 ... 0x0200 –
767 0x02FF
768 ... 0x0300 –
1023 0x03FF
illegal Address 0x0400 –
0x0FFF
4096... 0x1000 –
8191 0x1FFF
8192 ... 0x2000 -
12287 0x2FFF
12288... 0x3000 -
13385 0x3FFF
24576 ... 0x6000-
25340 0x62FC
28672 ... 0x7000-
29436 0x72FC
0... 0x0000 –
255 0x00FF
256... 0x0100 –
511 0x01FF
512... 0x0200 –
767 0x02FF
768 ... 0x0300 –
1023 0x03FF
illegal Address 0x0400 –
0x0FFF
4096... 0x1000 –
8191 0x1FFF
illegal Address 0x2000 -
0x2FFF
12288... 0x3000 -
13385 0x3FFF
24576 ... 0x6000-
25340 0x62FC
28672 ... 0x7000-
29436 0x72FC
IEC1131 Addresses
%IW0...
%IW255
%QW256...
%QW511
%QW0...
%QW255
%IW256...
%IW511
not supported
not supported
not supported
%MW0...
%MW4095
%IW512...
%IW1275
%QW512...
%QW1275
%QW0...
%QW255
%IW256...
%IW511
%QW0...
%QW255
%IW256...
%IW511
not supported
not supported
not supported
%MW0...
%MW4095
%QW512...
%QW1275
%QW512...
%QW1275
WAGO-I/O-SYSTEM 750
Description
phys. Inputs (1)
PFC OUT variables
phys. Outputs (1)
PFC IN variables
Configuration register
Firmware register
Flags range (default:
8kByte, size changeable)
phys. Inputs (2)
phys. Outputs (2)
phys. Outputs (1)
PFC IN variables
phys. Outputs (1)
PFC IN variables
Configuration register
Firmware register
Flags range (default:
8kByte, size changeable)
phys. Outputs (2)
phys.. Outputs (2)
ETHERNET TCP/IP