Not all Modicon programmable logic controllers behave/support the same function codes. The following table illustrates the differences:
|
Function Type |
Function |
184/384 |
484 |
584 |
984 |
Quantum |
VersaPoint |
VersaMax |
|
Read Coil Status |
1 |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Read Input Status |
2 |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Read Holding Reg. |
3 |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Read Input Reg. |
4 |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Force Single Coil. |
5 |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Force Single Hold Reg. |
6 |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Force Multiple Coil Reg. |
15 |
Yes |
No |
Yes |
Yes |
Yes |
No |
No |
|
Force Multiple Holding Reg. |
16 |
Yes |
No |
Yes |
Yes |
Yes |
Yes |
Yes |
|
Program General Reg. |
13 |
Yes |
No |
Yes |
Yes |
Yes |
No |
No |
|
Poll General Reg. |
14 |
Yes |
No |
Yes |
Yes |
Yes |
No |
No |
|
|
Supported Modbus TCP/IP Devices. |
