Initialise Linak multi-parallel systems correctly: The comprehensive guide for CBD6S controllers

Brief overview: These instructions explain step by step how to set up, initialise and expand Linak multi-parallel systems (e.g. with CBD6S controllers) correctly. You will learn why the full assignment of all controllers (except the last one), the chronological port assignment, the multi-parallel cable (A1/A2) and the correct handling of the Ini-Lock are crucial for stable, synchronised function.

Why initialisation is so important

Linak multi-parallel systems make it possible to operate several linear actuators (up to 16) synchronously - with high precision and repeat accuracy. In areas such as industry, medical technology, furniture construction, TV lift and lifting bed solutions(motorhomes/camper vans), reliability depends directly on proper initialisation. Errors in this step often lead to malfunctions, uneven movements, emergency shutdowns or increased wear.

What exactly is a Linak multi-parallel system?

A multi-parallel system connects several drives and controllers via a communication network (A1/A2) so that all motors work simultaneously and in a coordinated manner. Typical components:

• CBD6S controllers (master/slave in a network)
• Linear actuators/lifting columns (depending on the application)
• Multi-parallel cable for coupling via A1/A2
• Operating units (manual switch, app, remote control - depending on the system)
• Power supply according to specification

Basic rule no. 1: Full assignment of all control units

All controls must be fully assigned with drives. Only the last control unit in the chain may be partially assigned - and only from port 1 consecutively to port 2 or port 3 (no "gaps").

Example: Three control units with 4 ports each ⇒ Control unit 1: Ports 1-4 occupied; control unit 2: Ports 1-4 occupied; control unit 3 (last): Ports 1-2 (or 1-3) occupied. Any other constellation leads to instability.

Basic rule no. 2: Chronological port assignment

The drives are always connected in port sequence: first port 1, then port 2, port 3, port 4. An unchronological assignment (e.g. port 1 and port 3 without port 2) causes malfunctions or prevents initialisation.

Wiring via A1/A2 and multi-parallel cable

Connect the control units via the multi-parallel ports A1/A2 using the cables provided. Ensure correct connector routing, firm locking and damage-free cable paths. Initialisation can only be successful when the communication is established correctly.

Initialisation: This is how it works reliably

1. Check hardware: All controls (except the last one) fully assigned? Last control unit only port 1→2/3? Ports chronological?
2. Check communication: A1/A2 connection between all control units secure and correct?
3. Power supply: Power supply according to specification, no undervoltage; observe separate fuse protection if necessary.
4. Start initialisation: Initialise system according to manufacturer's instructions (e.g. defined key combination).
5. Repeat: Depending on the size of the system, you may need to carry out the process several times (5-8×) until all controls are properly synchronised.
6. Function test: Perform several full strokes, checking for synchronisation, noise, current consumption and end positions.

Tip: Pause briefly after each initialisation round so that the capacitors/power supply are stable and the bus communication can settle properly.

The Ini-Lock: protection & stumbling block

Many systems use an Ini-Lock, which "locks" the configuration after successful initialisation. This increases stability - but prevents extensions:

• An initialised 4-series system cannot simply be expanded to a 5/6/... system.
• For an extension, the Ini-Lock must be deactivated in the software.
• Only then can you set up a new multi-parallel system (up to 16 drives) and re-initialise it.

Note: If extensions are planned, manage the Ini-Lock specifically - otherwise the software will block the new configuration.

Common errors - and how to avoid them

• Incomplete assignment: A control in the centre is not fully assigned (except the last one). Result: Sync error.
• Unchronological ports: Ports skipped or cross-allocated ⇒ Initialisation fails.
• Incorrect/loose A1/A2 connection: Communication error, bus terminates.
• Ini-Lock active: Extension not possible, although more drives are connected.
• Too few initialisation cycles: 5-8 repetitions are common, especially with large networks.
• Undersized supply: Voltage dips under load lead to incorrect behaviour.

Best practices in practice

• Planning first: Define the required number of drives, controls, cable lengths, mounting points and load cases.
• Check mechanics: Rigid fastenings, low friction and correct parallelism reduce current peaks and false shutdowns.
• Clean electrics: Correct conductor cross-section, proper earthing, defined fuse protection, separate signal lines from the power range.
• Conscious initialisation: Step by step, count cycles, check bus quiescence after each cycle.
• Maintain documentation: Note port assignments, serial numbers, Ini-Lock status, firmware versions, cable routing.

Extensions & upgrades: How to proceed

1. Check the current status: Document the number of drives, assignment, Ini-Lock status, software version.
2. Deactivate Ini-Lock: In the relevant control unit via software.
3. Expand system: Add new drives (ports in chronological order), integrate additional control units if necessary.
4. Link A1/A2: Close multi-parallel bus properly.
5. Reinitialise: Repeat several times until synchronisation is stable.
6. Final test: Observe full strokes, load cases, end positions, temperature/current.

Typical applications

Linak multi-parallel systems show their strengths wherever several drives have to work simultaneously and precisely:

• Industry: Lifting/positioning systems, production lines, test benches.
• Medical: Nursing/surgery/x-ray furniture with multi-axis movement.
• Furniture construction & contract furnishing: Height-adjustable tables, conference furniture, TV lifts.
• Camper & motorhome: Electric lifting beds (lifting columns on side walls, synchronised movement, memory positions).

FAQ - frequently asked questions in compact form

What is the maximum number of drives possible?
Generally up to 16 in a multi-parallel system (depending on the system variant).

Why do I repeat the initialisation several times?
Large groups require several cycles until all controllers "know" the bus status and the end positions properly. 5-8 repetitions are not unusual.

Can I expand a 4-unit system later?
Yes - remove the Ini-Lock in the software, add drives/controllers in accordance with the rules, then re-initialise.

What does "chronological assignment" mean?
Ports of a controller are strictly assigned in the order 1→2→3→4. Only the last controller may be partially assigned (port 1→2/3).

Checklist: Stable start-up

• All controllers (except the last one) fully assigned
• Ports wired chronologically
• A1/A2 correctly and firmly connected
• Ini-Lock for extensions deactivated beforehand
• Initialisation repeated 5-8× (for large systems)
• Supply voltage and fuse protection sufficiently dimensioned
• Mechanical ease of movement & parallelism checked

Conclusion: Stability through clean setup

With the right approach - full assignment, chronological port assignment, correct A1/A2 cabling, conscious Ini-Lock management and multiple initialisation - Linak multi-parallel systems run stably, synchronously and for a long time. If you take these steps to heart, you minimise failures, protect drives and increase process reliability in industrial, commercial, medical and camper applications.