Comparison between AC500 and AC31/S90 MODBUS addresses

The following table shows the addresses for AC500 controllers and its predecessor AC31/S90:

Address

HEX

FCT

HEX

AC1131 operand

FCT

HEX

AC500 operand
Bit accesses
0000 … 0FFF 01, 02 %IX0.0 … %IX255.15 01, 02, 05, 07, 0F %MX0.0.0 … %MX0.511.7
0000   %IX0.0   %MX0.0.0
0001 %IX0.1 %MX0.0.1
0002 %IX0.2 %MX0.0.2
0010 %IX1.0 %MX0.2.0
0FFF %IX255.15 %MX0.511.7
1000 … 1FFF 01, 02, 05, 0F %QX0.0 … %QX255.15 01, 02, 05, 07, 0F %MX0.512.0 … %MX0.1023.7
1000   %QX0.0   %MX0.512.0
1001 %QX0.1 %MX0.512.1
1002 %QX0.2 %MX0.512.2
1010 %QX1.0 %MX0.514.0
1FFF %QX255.15 %MX0.1023.7
2000 … 2FFF 01, 02, 05, 07, 0F %MX0.0 … %MX255.15 01, 02, 05, 07, 0F %MX0.1024.0 … %MX0.1535.7
2000   %MX0.0   %MX0.1024.0
2001 %MX0.1 %MX0.1024.1
2002 %MX0.2 %MX0.1024.2
2010 %MX1.0 %MX0.1026.0
2FFF %MX255.15 %MX0.1535.7
3000 … 3FFF 01, 02, 05, 07, 0F %MX5000.0 … %MX5255.15 01, 02, 05, 07, 0F %MX0.1536.0 … %MX0.2047.7
3000   %MX5000.0   %MX0.1536.0
3001 %MX5000.1 %MX0.1536.1
3002 %MX5000.2 %MX0.1536.2
3010 %MX5001.0 %MX0.1538.0
3FFF %MX5255.15 %MX0.2047.7
4000 … FFFF   No access 01, 02, 05, 07, 0F %MX0.2048.0 … %MX0.8191.7
Word accesses
0000 … 0CFF 03, 04 %IW1000.0 … %IW1207.15 03, 04, 06, 10 %MW0.0 … %MW0.3327
0D00 … 0FFF 03, 04 No access 03, 04, 06, 10 %MW0.3328 … %MW0.4095
1000 … 1CFF 03, 04, 06, 10 %QW1000.0 … %QW1207.15 03, 04, 06, 10 %MW0.4096 … %MW0.7423
1D00 … 1FFF   No access 03, 04, 06, 10 %MW0.7424 … %MW0.8191
2000 … 2FFF 03, 04, 06, 10 %MW1000.0 … %MW1255.15 03, 04, 06, 10 %MW0.8192 … %MW0.12287
3000 … 359F 03, 04, 06, 10 %MW3000.0 … %MW3089.15 03, 04, 06, 10 %MW0.12288 … %MW0.13727
35A0 … 3FFF   No access 03, 04, 06, 10 %MW0.13728 … %MW0.16383
4000 … 47FF  

%MW2000.0.0 … %MW2063.15.1

No access

03, 04, 06, 10 %MW0.16384 … %MW18431
4800 … 4FFF   No access 03, 04, 06, 10 %MW0.18432 … %MW0.20479
5000 … 517F  

%MW4000.0.0 … %MW4023.15.1

No access

03, 04, 06, 10 %MW0.20480 … %MW0.21247
5180 … FFFF   No access 03, 04, 06, 10 %MW0.21248 … %MW1.32767
Double word accesses
0000 … 3FFF   No access 03, 04, 06, 10 %MD0.0 … %MD0.8191
4000 … 47FF 03, 04, 06, 10 %MD2000.0 … %MD2063.15 03, 04, 06, 10 %MD0.8192 … %MD0.9215
4800 … 4FFF   No access 03, 04, 06, 10 %MD0.9216 … %MD0.10239
5000 … 537F 03, 04, 06, 10 %MD4000.0 … %MD4023.15 03, 04, 06, 10 %MD0.1240 … %MD0.10815
5480 … FFFF   No access 03, 04, 06, 10 %MD0.10816 … %MD1.16383