Manufacturing › Connected Plant
PLC Tags
A memory address in a machine. The min and max are enforced on THIS side of the network, where the error message can say why.
Where to find it
- Module: Manufacturing
- Group: Equipment
- Section: Connected Plant
- Screen: PLC Tags
Address in the console: /mfg/plc-tags
List · 12 columns · 14 fields on its form · 3 of them required
What the list shows
These are the columns of the list, in the order they are drawn. Any of them can be sorted on, filtered on, hidden, or exported.
| Column | Kind | Field name |
|---|---|---|
| Tag | Code | tag_name |
| Controller | Code | controller_no |
| Address | Code | address |
| Type | Status | data_type |
| Access | Status | access |
| Unit | Code | uom |
| Scale | Number | scale_factor |
| Min | Number | min_value |
| Max | Number | max_value |
| Bindings | Number | bindings |
| Last value | Code | last_value |
| Last read | Date and time | last_read_at |
The form
What is asked for when a record is created here. Required fields are marked; a choice drawn from a configuration list is one an administrator can extend without a release.
| Field | Type | Choices | Notes |
|---|---|---|---|
| Controller required | Choice | Looked up from existing records | |
| Tag name required | Text | ||
| Address required | Text | DB10.DBW4, ns=2;s=Line1.Count, 40001… | |
| Data type | Choice | bool, int, dint, real, lreal, string, word, dword, byte, time | |
| Access | Choice | read, write, read_write | |
| Unit | Text | ||
| Scale factor | Number | ||
| Offset | Number | ||
| Minimum writable | Number | ||
| Maximum writable | Number | ||
| Poll interval (ms) | Number | ||
| Subscribe rather than poll | Yes or no | ||
| Deadband | Number | ||
| Active | Yes or no |
The rules that apply here
Everything on this screen obeys the platform rules rather than rules of its own. The ones worth knowing before you use it:
- Narrowing a list — search, conditions, sort, totals, export and saved views.
- What may be changed — the five grounds a record may not be edited on.
- Companies and business units — what the switcher above this list is doing to it.
- Creating a record — required fields, where choices come from, and how the number is allocated.
- Importing a spreadsheet — this screen accepts one, and it runs through the same rules as typing.