Then LION fieldbus concept¶

LION is a joint venture between DAVITOR AB and Naronic AB

The concept consists of the following parts:

• Field bus specification
• Hardware form factor
• Source code

The bus is fundamentally an i2c bus and the IO-modules along the bus is slaves controlled by one master.

Highlights¶

• All slaves share same i2c address independent of the number of slaves. This lowers the complexity in the Master code when the whole bus looks like a singe i2c slave device independent of the number of modules.
• Data points as channels.
  Currently supported channel types in the standard:
  • AL - Alert Channel. Special event channel to read when then ALERT line goes low.
  • AI - Analog Input
  • AO - Analog Output
  • DI - Digital Input
  • DO - Digital Output
  • SI - Input Stream. Forwards log text or serial data etc. to Master.
  • DA - Dali lightning control
• A dedicated ALERT line telling the master to read the alert channel
• Supports firmware boot loading of the slave modules over the filed bus.

• Config - This is a daisy changed link that goes through all slave modules. This line is used when performing channel setup but also when there is a need for stepping the bus for single modules access. Typically for maintenance, firmware upgrade etc.
• Alert - Goes low if a slave module needs to tell the master to read data.
• Clock - Clock signal
• Data - Data signal
• Power - The power supply for the slave module bus circuitry. Typically 3.3v.
• High Power - Typically 12v-24v that can be used when there is high power consumers internally or external from the module. Eg. motors, solenoids and lightning.
• Reset - When held low all modules bus chip will be rebooted.
• GND - Common ground for both Power and High Power lines.

The channel concept in LION¶

All data points on a LION bus has a channel number assignment within it's channel type context.
Eg. If the device has three modules with 4 DO points each the total number of DO channels are 12. After the initial (usual factory preset) channel assignment process is done the master will only work with channels, not modules and points.

Bus modes and adresses¶

The LION Bus operates in three modes.

• Data (0x28) - Normal operational mode
• Config (0x2C) - Halted operation while each module are acceded individually.
• Bootloader (0x33) - I used when modules need firmware upgrade

LION Tool¶

A java software called LionTool can be downloaded to handle all operation needed for test and maintain the bus. The software act as the Master and supports all three bus modes.
LionTool uses same java driver to become a LION master as the DTXr.

To install you can download from davitor repository by

wget --user admin --password **** https://artifacts.davitor.com/repository/davitor-mvn-release/com/davitor/multigrator/lion/1.7/lion-1.7-app.zip

Consult DAVITOR for correct version first

Unzip and run as

• For channel assignment add the -a option
  

  sudo java -jar lion-1.7.jar -a
  

• For test mode
  sudo java -jar lion-1.7.jar