Table 4.4.: Modbus data types
Modbus Type | Server Data Type |
| Size | Access Rights |
discrete input | bool |
| fixed | Read-Only |
coil | bool |
| fixed | Read-Write |
input register | uint16 |
| fixed | Read-Only |
input register | int16 |
| fixed | Read-Only |
Table 4.4.: Modbus data types
Modbus Type | Server Data Type | Size | Access Rights |
input register | uint32 | fixed | Read-Only |
input register | int32 | fixed | Read-Only |
input register | float | fixed | Read-Only |
input register | double | fixed | Read-Only |
input register | bool | fixed | Read-Only |
input register | time | fixed | Read-Only |
input register | string | 1 – 246 | Read-Only |
input register | wstring | 1 – 123 | Read-Only |
holding register | uint16 | fixed | Read-Write |
holding register | int16 | fixed | Read-Write |
holding register | uint32 | fixed | Read-Write |
holding register | int32 | fixed | Read-Write |
holding register | float | fixed | Read-Write |
holding register | double | fixed | Read-Write |
holding register | bool | fixed | Read-Write |
holding register | time | fixed | Read-Write |
holding register | string | 1 – 246 | Read-Write |
holding register | wstring | 1 – 123 | Read-Write |