Devices, labels and equipment
OPC UA servers with DigiOS.
Values from any OPC UA server reach the floor view, and DigiOS writes back only the destinations and acknowledgments you list.
What moves each way
OPC UA servers
- Node values: Into DigiOS
- Writes: Out of DigiOS
- Method calls: Out of DigiOS
- Server status: Into DigiOS
DigiOS
| What | Direction | Documents and data | When |
|---|---|---|---|
| Node values | In | Values of the nodes you choose, sent as they change | As each value changes |
| Writes | Out | A value written to a node, such as a target or a recipe number | When the floor releases the work |
| Method calls | Out | A call to a method the server offers, with its arguments | When the floor asks |
| Server status | In | Whether the server is up and the quality of each value | Continuously |
On your floor
Line 27 running1 stopped1 backed upOPC UAMQTTModbus TCPYour warehouse · current to 10:42:07
- Pack stationsStation 2 has no packer
- InfeedPhoto-eye clear
- Scanner S2Read C-77120
- ScaleStable at 3.12 kg
- SorterDiverter 2 released
- Lane 1 StandardOpen
- Lane 2 ExpressOpenC-77120
- Lane 3 BulkyFull sensor on
- Lane 4 RecheckOpen
Pack stations · StoppedStation 2 has no packer. Holding up SO-48231 (Wrenfield Home) and SO-48236 (Maplecote Foods).
Lane 3 Bulky · Backed upFull sensor on. Clear 4 pallets of bulky parcels.
| Carton | Order | Client | Weight | Divert decision | State |
|---|---|---|---|---|---|
| C-77118 | SO-48206 | Ravenscar Outdoor | 1.84 kg | Lane 1: standard service | Sorted to lane 1 |
| C-77120 | SO-48213 | Wrenfield Home | 3.12 kg | Lane 2: express service | Sorted to lane 2 |
| C-77121 | SO-48217 | Maplecote Foods | 4.40 kg | Lane 1: standard service | Next on the belt |
| C-77122 | SO-48220 | Ravenscar Outdoor | 2.05 kg | Lane 4: 0.37 kg off, recheck | To recheck |
| Segment | State | Signal | Orders and loads |
|---|---|---|---|
| Pack stations | Stopped | Station 2 has no packer | Holding up SO-48231 (Wrenfield Home) and SO-48236 (Maplecote Foods) |
| Infeed | Running | Photo-eye clear | 6 cartons waiting |
| Scanner S2 | Running | Read C-77120 | SO-48213 |
| Scale | Running | Stable at 3.12 kg | Expected 3.10 kg |
| Sorter | Running | Diverter 2 released | Lanes 1 to 4 |
| Lane 1 Standard | Running | Open | UPS pickup · door 6 · 16:30 |
| Lane 2 Express | Running | Open | SO-48213 · Wrenfield Home |
| Lane 3 Bulky | Backed up | Full sensor on | Clear 4 pallets of bulky parcels |
| Lane 4 Recheck | Running | Open | SO-48220 · weight off by 0.37 kg |
How DigiOS works with OPC UA servers
DigiOS acts as an OPC UA client from the edge gateway in your building. It browses the server's nodes, subscribes to the ones you pick, and writes values or calls methods where you allow. Security follows the server's own policy, with a certificate trusted on both sides.
- Where it stands
- Designed1 Nov 2026
- About OPC UA servers
- OPC UA is a vendor-neutral standard for exchanging industrial data, with servers built into many controllers and gateways.
- Your account
- The devices, printers and controllers stay yours, on your network. DigiOS reaches them through an edge unit in your building, or from the browser.
- If a document is rejected
- A scan, a label or a command that fails shows on the device and in the exceptions list with its reason, and nothing is sent again on a guess.
Questions about OPC UA servers
Does the machine have to be new?
No. Many older machines gain an OPC UA server through a gateway or a software add-on, and DigiOS talks to that.
Does OPC UA work with robots?
Yes, where a robot's controller offers an OPC UA server. For fleets of mobile robots, VDA 5050 is the usual interface.
How are values named?
By the node names the server publishes. We agree the list with you, and the names show on the screens people use.
Related systems
Rockwell Automation and Allen-Bradley PLCs over EtherNet/IPWork out to the controller's tags. Line and machine state back.Siemens PLCs over PROFINET and S7Work out to the controller's data blocks. Line and machine state back.MQTT and Sparkplug BMachine data in from an MQTT broker. Commands out to edge nodes and devices.
Ask about OPC UA servers.
Tell us what you run and what you want OPC UA servers to do. A person answers in writing.