Multiple Web Width Measurement — Industrial Ethernet — SCU6x

✓ What You'll Achieve

After completing this guide, wired to your SCU6x controller with per-lane width data for up to 64 lanes available over Industrial Ethernet for your PLC.

Estimated time: ~3–4 hours (includes overlap teaching)

☐ What You Need

SCU6x Ethernet

• ODC Family sensor — select size so sensing range covers all lanes plus wander margin
• SCU6x controller (with Industrial Ethernet option)
• Quick Disconnect Sensor Cable - 3m (10 ft) (U2-01975)
• 24 V DC Input Power Cable for SCU6x or 1DC - 5m (21218x-5m)
• M12 to RJ45S, Shielded Cable - 9.8ft/3m (21222-3m)
• 24 VDC power supply
• For two sensors: second ODC Family sensor + second sensor cable (U2-01975)

Prerequisites

• Machine accessible and safe to work on
• 24 VDC power available at the installation location
• Sensor mounting location identified — plan where to install one or two sensors within the machine frame for optimal coverage of all lanes
• For Ethernet paths: Ethernet network ready (switch port available, IP address planned)
• For Digital Monitoring path: stacklight, alarm, or PLC digital input wired and ready
• Strips or lanes running (or available to run) for initial setup and teaching
• For two-sensor overlap setup: a single strip of known width, wide enough to span the overlap zone between the two sensors

SCU6x Output Options

SCU6x models differ by output: DIO provides a combined GO/NO-GO pass/fail across all lanes, C(x)D provides per-lane data over Industrial Ethernet, and C(x)DIO provides both. (SCU6x has no analog output.)

1 Install the Sensor

Multiple web width measurement uses free span mounting (web unsupported between rollers). Install the sensor so that the length of the sensor is parallel to the cross-machine direction (the width direction of the web). All strips and gaps must be visible within the sensor field of view.

Two Sensor Setup (SCU6x Only)

• Mount both sensors side by side so their combined fields of view cover all lanes
• Overlap the fields of view — the two sensors must have an overlapping region so no edge falls in a dead zone between them
• Mount both with the same camera (physical) orientation, but set their electronic orientation oppositely — one sensor referencing the left edge of the span, the other the right
• The sensors do not physically overlap — they are mounted side by side, but their sensing ranges overlap
• Not available for 1DC — use SCU6x with two ODC sensors for wide lane spans

Reference Documents

• Sensor Installation Recommendations (inspection applications)

2 Wire the System

Sensor connects via Quick Disconnect cable. Ethernet via M12 D-coded connector.

1. Sensor: Connect Quick Disconnect Sensor Cable (U2-01975) from ODC sensor to SCU6x port S1
2. For two sensors: connect second Quick Disconnect Sensor Cable (U2-01975) to SCU6x port S2
3. Power: Connect 24 V DC Input Power Cable for SCU6x or 1DC (21218x-5m) to SCU6x port Z2
4. Ethernet: Connect M12 to RJ45S, Shielded Cable (21222-3m) from SCU6x port P1 to PLC or network switch

3 Configure & Verify

The SCU6x and 1DC share the same controller firmware with a dedicated multiple web width measurement mode that auto-detects lanes and computes per-lane widths.

Common Configuration Mistakes

• Gaps between strips too small — controller cannot distinguish adjacent lanes (see Install for the minimum gap).
• Forgetting to press Apply after changing parameters
• Confusing teach overlap with teach correction — they are separate operations
• Overlap teaching sample doesn't span correctly — one edge must be in sensor 1 only, other edge in sensor 2 only
• Not re-teaching overlap after moving sensors — width readings drift for lanes in the overlap zone

View full configuration documentation

4 PLC Integration

Per-lane width data is available in dedicated Ethernet registers (identical register layout on SCU6x and 1DC) — no PLC-side computation needed.

• Per-lane width values in application page 100–132
• Includes lane count, per-lane width, per-lane fault/status, and overall width (outermost left edge to outermost right edge)
• All width values include overlap correction (two sensors) and teach correction (if taught)
• Up to 64 lanes per controller — each lane occupies a fixed number of registers
• Rockwell customers: map multi-web registers manually using the register map. A dedicated multi-web AOI is planned for a future release.

📄 The register map, EDS file (EtherNet/IP), and Add-on Instruction (AOI) for Studio 5000 are in the Your Products section above — grouped on the product card with everything else you need to download.