SEW MOVITRAC modbus control

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This is a simple controller for SEW MOVITRAC motor controllers.

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Instructions

Read section 10 of the controller's documentation (that's the "installation" chapter).

Configure the controller. Minimum initial configuration:

• P1-10: nominal motor speed in r/min.

• P1-01: max motor speed

• P1-02: min motor speed

• P1-07: motor voltage (V)

• P1-08: motor current (1/10 A)

• P1-09: motor AC frequency (50Hz)

• P4-01: control mode. See the documentation. You probably want 2.

• P1-12: 7 (Modbus)

• P1-15: 201 (extended control)

• P5-03: 0-4 (Baud rate, 9600 … 115200)

• P5-04: 0-3 (parity: no/no2/odd/even)

• P5-06: timeout in 1/10 sec, zero to disable (this is NOT recommended!)

• P5-09: 1 (speed as percentage of max)

Check that the motor can turn freely without injuring somebody or breaking something. Check again.

Now connect the emergency switch. See section 6.3.2 in the documentation. DO NOT proceed if this switch is not installed correctly.

The controller should now auto-tune its motor parameters. This process takes up to two minutes and may engage the motor. You can also trigger this process manually by setting P4-02 to 1.

Write a config file along these lines::

link:
  root: !P moat.com.example
dev:
  sew:
    power: !P moat.sew.power
    state: !P moat.sew.state
    mqtt:
      will:
        topic: !P moat.sew.state
        message: null
    modbus:
      port: "/dev/ttyUSB0"
      serial:
        rate: 19200
        parity: N
      unit: 1

Run "moat -c CONFIG dev sew run".

You now can operate the motor. Send a percentage to the topic moat.sew.power. You probably should use QOS=1.

MoaT-Link messages are sent as CBOR-encoded data, under the topic configured in link.root. If you need them as ASCII or JSON, set up a MoaT-Link MQTT gateway.

TODO

• Add more control.