Properties

16 bit word Read-Write Starting address 0x40001 to 0x49999

The HoldingRegister item type has the following properties:

NameDescriptionIDFlags
Offset

The linear transformation addend to use when calculating and item value. (Value = RawValue * Scale + Offset)

5006Persisted
Quality

Item quality - this tells you whether an item currently has a good or bad quality. It might be bad, for example, because it isn't connected or is set to the wrong type.

3ReadOnly
Rawvalue

The raw, untranslated value of the item.

10075Persisted
Rights

Item access rights - this property may be "read", or "read write". This means that the property may only be read from, or also can be written to. For OPC items, this written value will be passed on to the external items this item comes from.

5ReadOnly
Scale

The linear transformation multiplier to use when calculating the item value. (Value = RawValue * Scale + Offset)

5005Persisted
Slaveaddress

The slave address (Unit ID) of the Modbus slave (overrides the module property).

10030Persisted
SrcItemID

The item ID in the source. This is the item ID this item uses to fetch data from the source.

5030Persisted
Time

The date and time when this item was last updated.

4ReadOnly
Type

The item canonical data type - the specific type of this item. Whether it's an integer, string, date, etc.

1ReadOnly
Valuetype

Item canonical datatype in Modbus register. This determines what kind of data this field holds. For example: string, integer, etc.

10045Persisted, Enumerated

See also Predefined Item Properties and OPC DA Properties