Device-specific system items
- Last UpdatedAug 19, 2024
- 1 minute read
The following system items refer to specific information regarding the data source(s) Gateway Communication Driver is connected to.
|
System Item Name |
Type/Access Rights |
Description |
Values |
|---|---|---|---|
|
$SYS$Status |
Boolean/ Read |
Binary status indication of the connection state to the device (hierarchy level) the item is attached to. The device group (OPC access path/topic) does not affect the value. The status can be good even if individual items have errors. |
RANGE: 0, 1 1: Gateway connection to the data source is intact. 0: Error communicating with the data source. |
|
$SYS$ErrorCode |
Longint/ Read |
Detailed error code of the communications state to the data source. The device group (OPC access path/topic) does not affect the value. |
>= 0: Good status (0 is the default state – connected. >0: is some state like: connecting, initializing, etc. <0: Error status (value indicates the error). |
|
$SYS$ErrorText |
String/ Read |
Detailed error string of the communications state of the data source. The device group (OPC access path/topic) does not affect the value. |
Descriptive text for the communications state corresponding to the error code. |
|
$SYS$StoreSettings |
Integer/ Read Write |
Not used. |
Caution: For all three device-specific system items, status is always good for an ArchestrA data source.