Static vs dynamic DWS for factory dispatch
Select static or dynamic dimensioning, weighing and scanning from the dispatch workflow. Reject the mixed transaction.
Industry // Logistics & distribution
Request an assessmentMachine vision for distribution centres and dispatch in South Africa
Code readers and cameras where pallets, cartons, totes and parcels change hands: receiving, put-away, packing, sortation and dispatch.
Technical review: Frank GuoReviewed
// Short answer
Machine vision in a distribution centre puts fixed code readers and cameras where goods change hands. At receiving and dispatch they read the SSCC on GS1-128 pallet labels and match it to the warehouse system; on conveyors and at sortation a scan tunnel reads every carton in motion and, with a dimensioner and scale, records size and weight. No-reads go to a manual lane. Reading a barcode does not grade its print quality, and size or weight used for billing may need legal-for-trade approval.
// Where it fits
Check points through a distribution centre
A typical flow for a retail or e-commerce DC; your site may add or skip steps. Each check sits where an unread or wrong label would otherwise travel on.
[Schematic]Goods flow · not to scale
Swipe sideways to see the whole drawing →
[1] Pallet label: SSCC read at receiving and matched to the expected receipt.
[2] Carton or tote ID: read on the conveyor so each item goes to the right location.
[3] Order carton: visible items and the shipping label checked before sealing.
[4] Scan tunnel: every item read in motion, with size and weight where needed.
[5] Pallet to load: pallet labels matched to the load before it leaves the dock.
// Defect risks
What goes wrong at each step
Faults by step, from the supplier’s end of line to the dispatch dock, and the page that covers the check.
| Step | Typical faults | Inspection |
|---|---|---|
| Supplier end of line | Case or pallet labels that do not scan, or carry the wrong content, so goods are held or turned away at the receiving dock | Carton & pallet verification |
| Receiving | Missing, torn or unreadable pallet label; an SSCC the warehouse system does not expect | Carton & pallet verification |
| Put-away and storage | Carton or tote label not read on the conveyor, so the item stops or goes to the wrong location | Choosing a code reader |
| Picking and packing | Shipping label missing, on the wrong carton or out of step with the order; a visible item missing from an open carton | Carton & pallet verification |
| Sortation | No-reads, codes unknown to the warehouse system, two touching items read as one, items out of size | Scan tunnel & dimensioning |
| Dispatch | Pallet label on the wrong pallet, two labels on one pallet that disagree, a pallet staged for the wrong store | Carton & pallet verification |
// Inspections
Checks that apply in logistics and distribution
In a DC the main job is identification: reading the right code on every item and passing it to the warehouse system or sorter. Counting and label checks apply where items are still open or labels are on known faces.
Scan tunnel & dimensioning
Readers around the conveyor read the label on any covered face; a dimensioner and scale add size and weight.
At: induction and sortation
Carton & pallet verification
Case and pallet labels read and matched to the order or load held by the warehouse system.
At: packing and dispatch
Tyre barcode reading
Fixed readers read the label on every tyre on the conveyor and divert no-reads.
At: tyre warehouses and DCs
Barcode verification & grading
Why a reader confirms content while only a verifier grades print quality to GS1 levels.
At: the label printer
// Application map
Distribution inspection scenarios by item
Common items in South African distribution centres and dispatch areas, what a reader or camera checks on each, and the page with the detail. The method in each row is a starting point, confirmed on your own items and labels. Weight for billing, contents of sealed cartons and RFID tags need other equipment.
| Item / position | What is checked | Typical fault caught | Method | Related page |
|---|---|---|---|---|
| Inbound supplier palletsat the receiving dock | SSCC on the pallet label | Missing or unreadable label; an SSCC the warehouse system does not expect | Fixed code reader at a defined pallet stop; the read SSCC is checked against the expected receipt | Carton & pallet verification |
| Cartons on the inbound conveyorat induction, after decanting | Carton barcode on whichever face it is | No-read; label on a face the station does not cover | Logistics readers on several sides of the belt; a line-scan reader across the top | Scan tunnel & dimensioning |
| Plastic toteson the tote conveyor to and from pick stations | Tote ID label on its fixed face | Dirty, scratched or missing tote label; tote sent to the wrong station | One fixed reader aimed at the known label face, triggered per tote | Choosing a code reader |
| Order cartonsafter packing, before sealing | Items visible from above in the open carton; the shipping label | A visible item missing; a label for another order | Overhead camera on the open carton; label read and matched to the order in the warehouse system | Carton & pallet verification |
| Parcels and polybagsat sorter induction | Barcode on any covered face; length, width, height and weight | No-read, two touching items, an item out of size; glare and creases on polybag labels | Scan tunnel with a 3D dimensioner and a scale; soft items measured on samples first | Scan tunnel & dimensioning |
| Mixed store palletsat dispatch, before loading | Pallet labels on the agreed faces; both labels carry the same SSCC | Label on the wrong pallet; two labels that disagree; pallet for the wrong store or load | Readers at a pallet stop, reads matched to the load held by the warehouse system | Carton & pallet verification |
| Tyreson the tyre conveyor in a warehouse or DC | Barcode label on the tyre | No-read, code unknown to the warehouse system, tyre on the wrong lane | Several fixed readers around the tyre; no-reads diverted | Tyre barcode reading |
| Shipping cases from a factoryat the supplier’s end of line, before the DC | Case label decodes with the right content; print quality on samples | Labels that will not scan at the receiving dock | In-line reader on every case; a verifier at the printer for the GS1-128 print grade | Barcode verification & grading |
// South Africa
South African DCs and the GS1 logistic label
Where goods are identified, what the GS1 rules require on case and pallet labels, and which parts a reader can check.
Retail goods in South Africa move through large central distribution centres. The Shoprite Group reports 29 distribution centres with over 900 000 m² under roof, and its Riverfields DC in Gauteng serves over 500 stores (Shoprite fact sheet). In a DC of that kind every pallet, carton and tote is identified by barcode several times between receiving and dispatch, so a label that will not scan costs time at each step.
No South African rule requires a camera or a scan tunnel in a DC. The rules that matter are the GS1 standards for logistic labels, which suppliers and DCs work to:
- SSCC: the Serial Shipping Container Code identifies one logistic unit, such as a case or a pallet (GS1 SSCC). It is the single mandatory element on every GS1 logistic label, carried in a GS1-128 barcode (GS1 General Specifications, 2026). It is the number a receiving or dispatch check matches against the warehouse system.
- Minimum print quality: the GS1 General Specifications set 1.5/10/660 for barcodes in general distribution, such as ITF-14 and GS1-128, where grade 1.5 corresponds to ISO grade C (GS1 General Specifications, 2026). Grading to that level needs a verifier; an in-line reader confirms that the code decodes with the right content.
- Label placement: the GS1 Logistic Label Guideline gives placement and verification recommendations for logistic units (GS1 Logistic Label Guideline). For a fixed reader, what matters is that every pallet carries its labels on the same faces.
- Listing: GS1 South Africa tests barcodes to ISO/IEC 15416 and states that many retailers require its barcode test report when a product is listed (GS1 South Africa).
Size and weight used for billing
A dimensioner and a scale record size and weight against each code. Where measured weight or volume is used to charge a customer, legal metrology may require approved, legal-for-trade equipment. addaScan does not claim that approval for any device on this site; confirm it before dimension or weight data is used for billing.
Sources for this section
- Shoprite Holdings fact sheet: supply chain and the Riverfields DC (company fact sheet, checked 2026-10-02)
- GS1: Serial Shipping Container Code (SSCC) (standards body page, checked 2026-09-24)
- GS1 General Specifications 2026: logistic label (SSCC, GS1-128) and minimum symbol quality (standard, read 2026-09-25)
- GS1 Logistic Label Guideline (standards body page, checked 2026-09-24)
- GS1 South Africa: barcode verification service (read 2026-09-25)
// Integration
Conditions specific to distribution centres
These decide whether every item is read once, by the right station, and whether the warehouse system can act on it.
Singulation
One item at a time
Each read, measurement and weight must belong to one item, so items need a gap between them. A tunnel can flag two touching items; it cannot separate them.
We askHow items are inducted and spaced
Label faces
Where labels may be
The more faces a label may be on, the more readers are needed. A label on the bottom needs a reader under a split belt.
We askWhich faces carry labels today
Item mix
Cartons, totes, polybags, tyres
Board, plastic film and rubber each reflect light differently; film glare and creased labels are the usual no-reads. Soft items are measured on samples first.
We askItem types and packaging
Systems
Warehouse system and sorter
HIKROBOT lists SmartSDK, TCP, serial and FTP for its ID6000 and ID7000 logistics readers, not PROFINET or EtherNet/IP. Results go over TCP; a gateway is added for a PLC.
We askWMS and sorter supplier, message format
Dock conditions
Daylight, dust and traffic
Open dock doors change the light through the day, and forklifts pass close to pallet stops. Readers sit in guarded frames with their own lighting.
We askDock layout and pallet stop positions
Billing data
Size and weight
If size or weight will be used to charge customers, legal-for-trade approval may apply and must be settled first. For internal checks it is not needed.
We askWhat the size and weight data is for
// Limits
What vision does not do in a DC
We agree these boundaries before a project starts.
Needs another method
- Print quality grading. Reading confirms content; a GS1 print grade needs a verifier at the printer.
- Contents of sealed cartons. Count while the carton is open, or weigh it.
- RFID tracking. RFID tags on pallets and assets are a different technology, handled by addanode.
- Picking and handling. We do not supply robot picking, palletisers, AMRs, conveyors or sorters.
Works reliably when
- Items are singulated. A gap between items, with a trigger for each one.
- Labels sit on agreed faces. Fewer allowed faces means fewer readers.
- No-reads go to manual. If a station is down, items go to manual handling, not onward unscanned.
// Samples & acceptance
What to send for a sample test
We test your own items and labels before proposing a station; quantities and shipping are agreed first. The same items later define acceptance.
Sample preparation guideReal items
Cartons, totes, polybags or pallets from your normal flow, with their labels as printed.
Hard cases
Torn, creased, faded or film-covered labels, and labels on odd faces, each marked.
Label and data
Label templates, barcode types, and example records of what the warehouse system expects.
Acceptance
No-reads, wrong routes and size or weight mismatches against reference items, counted over an agreed run; challenge items must reach the manual lane.
// Manual inspection
Why manual inspection struggles on these lines
Conditions on distribution centres that make checking by eye unreliable over a full shift.
- Speed. Conveyors and sorters move items faster than labels can be read by eye, and handheld scanning slows the flow.
- Many label formats. Labels from many suppliers, in different layouts and positions, make it hard to check by eye that the right code is on the right item.
- Glare on film. Stretch-wrapped pallets and polybags reflect light, so labels under film are hard to read at a glance.
- Dock conditions. Daylight through open doors and forklift traffic make close checks at the pallet hurried.
- Shift fatigue. Night shifts and repetitive scanning lead to skipped scans and pallets matched to the wrong load.
These are reasons to automate the checks that are defined and visible, and to keep people for judgement and for fixing causes. The guide to manual or automated camera inspection compares the two.
// Line solutions
Line solutions for logistics and distribution
Complete stations for lines in this industry, each with the HIKROBOT hardware, installation and an indicative installed budget for a typical application in rand, excluding VAT. All line solutions →
| Line solution | Faults it catches | HIKROBOT configuration | Indicative budget (excl. VAT) |
|---|---|---|---|
| Scan tunnel | Unscanned and no-read items, codes unknown to the WMS, touching items | ID7000 + ID6000 tunnel, dimensioner and scale, WMS over TCP | R 1 210 000 – R 4 150 000 |
| Pallet identification | Missing, unreadable or mismatched SSCC labels; pallets not on the load | ID5000X or ID6000 readers on two sides, WMS match, hold | R 280 000 – R 1 180 000 |
// FAQ
Logistics and distribution inspection questions
What does machine vision do in a distribution centre?
Mostly it identifies things. Fixed code readers read the barcode on pallets, cartons, totes and parcels where they change hands, at receiving, on conveyors, at sortation and at dispatch, and send each read to the warehouse system or sorter. Cameras add checks such as an open order carton before sealing, and a 3D dimensioner adds size. Anything that cannot be read goes to a manual lane.
What is the difference between a scan tunnel and a barcode verifier?
A scan tunnel reads the code on every moving item and passes the content on; it cannot say whether the print meets the GS1 quality level. A verifier grades a label’s print quality on samples, usually where the label is printed. A DC needs reading; a supplier who wants to avoid rejected deliveries needs both.
Can a camera check SSCC pallet labels before dispatch?
Yes, when pallets stop at a defined position and the labels are on agreed faces. The reader decodes the SSCC, the warehouse system compares it with the pallet expected on that load, and the pallet is held on a mismatch or no-read. Labels placed anywhere on a wrapped pallet are not read reliably.
Why do supplier cartons get turned away at a DC, and can vision help?
Usually because a case or pallet label is missing, carries the wrong content or will not scan. An in-line reader at the supplier’s end of line catches labels that do not decode or carry the wrong content before they ship. Print quality against the GS1 minimum is checked with a verifier, and GS1 South Africa states that many retailers require its barcode test report when a product is listed.
Can dimension and weight data be used to bill customers?
Only after you have confirmed the equipment is approved for that use. Where measured weight or volume is used to charge a customer, legal metrology may require legal-for-trade equipment. We do not claim that approval for any device on this site. For internal use, such as checking carton sizes or planning loads, approval is not the question.
Do the logistics code readers connect to PROFINET or EtherNet/IP?
Not directly. HIKROBOT lists SmartSDK, TCP, serial and FTP for its ID6000 and ID7000 logistics readers, with UDP on the ID7000. Results normally go to the warehouse system or sorter over TCP; where a PLC needs them, a gateway is used.
Can a camera count the items inside a sealed carton or a wrapped pallet?
No. A camera cannot see through board or opaque film, and only the outer faces of a built pallet are visible. Check items while the carton is open, or weigh it; check cases before they are stacked.
Does addaScan supply RFID pallet tracking or robot picking?
No. addaScan reads printed barcodes and labels and checks what is visible to a camera. RFID tagging of pallets and assets is a different technology, handled by our parent company addanode. We do not supply robot picking, palletisers, AMRs, conveyors or sorters; we fit readers and cameras to the equipment you have.
Related:
Sources
- HIKROBOT MV-ID6120PM-00C-NNG logistics code reader (ID6000) (vendor product page, checked 2026-10-02; protocols listed)
- HIKROBOT MV-ID7080EM-35F-WHA 8K line-scan logistics code reader (ID7000) (vendor product page, checked 2026-10-02; protocols listed)
// Logistics & distribution
Request an assessment for your DC or dispatch area
Tell us the items, where the labels are, how items are inducted and which system expects the data. We will say which checks apply and what a sample test needs.