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Modbus

Older machines connected through Modbus.

Plenty of good machines only speak Modbus. The edge gateway in your factory reads their registers and turns them into counts, stops and measurements in Frontlink, without replacing the machine or its control.

Modbus and Frontlink.

Modbus is one of the oldest and most widely used industrial protocols, found in PLCs, drives, meters and older machines. The Frontlink edge gateway reads Modbus TCP over the network, or Modbus RTU over a serial connection.

Registers, coils and inputs are mapped to counts, machine states and measurements, so machines that are decades old deliver the same data as new ones, without replacing their control.

Direction
Read
Data exchanged
Counters, run and stop signals, speeds, temperatures and energy use
How it connects
Modbus TCP or RTU through the edge gateway
Access
Network or serial access to the device
Typical setup time
About a day per machine type, with the register list

What moves between them.

  1. Counts from the PLC

    The counter register becomes output on the running order, per shift and per batch.

  2. Running or standing still

    Status signals show when a machine stops, so downtime is measured instead of estimated.

  3. Settings and measurements

    Temperatures, speeds and set points are read and stored with the batch.

How we connect it.

  1. We check the machine with you

    We look at the PLC, the register list and how it is wired, often in one visit.

  2. The gateway reads, it does not write

    Frontlink only reads registers. The machine's own control is not changed.

  3. Modbus TCP or RTU

    Over the network, or through a serial connection for older machines.

Frequently asked questions.

Do we need the machine builder?

Sometimes, for the register list. Often it is in the manual or the PLC program already.

Can Frontlink control the machine?

No. Frontlink reads what the machine does. Control stays with the machine and the operator.

Can Frontlink read energy meters?

Yes. Many energy meters speak Modbus, so energy use per order or batch can be recorded.

Is the gateway reachable from the internet?

No. It only connects outward to Frontlink, over an encrypted connection.

Using something else? Tell us.

In a 30-minute call we look at your systems and machines and tell you which connections make sense to start with.

Book a call