Description
This function actively reads the value issues a read operation of the specified item . Compared to getting a value, a value read also sends a read request to the field device. An optional delay can also be specified. It is possible to delay thisThe result is received asynchronously from the field and therefore not returned by this function. Only data points related to field level interfaces are supported.
Signature
...
nxa.ReadValue (string, number)
Parameters
| Name | Type | Mandatory/Optional | Description |
|---|---|---|---|
| string | M | itemID of the item that shall be read | |
| number | O | delay in milliseconds (optional) |