Differences

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--- en:hw:04-extensions-communication-hidden [2020/07/28 09:06]
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+++ en:hw:04-extensions-communication-hidden [2022/09/29 09:44] (current)
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-The extension module and the control system communicate via the RS485 serial line using Modbus RTU protocol. For all devices to communicate you need to configure matching communication parameters for each of them. However, each module must have its own unique Modbus address within the bus. Modules can be configured using blue-white ([[#hw_configuration_using_dip_switches|HW configuration]]) switches placed next to the power connectors, or alternatively next to the RS485 on some models. Another option is configuration via Modbus registers ([[#sw_configuration_via_modbus_rtu|SW configuration]]). Configuration via DIP switches offers enough options for most applications, while configuration via Modbus registers provides broader possibilities (wider range of addresses and bitrates).
+Modules can be configured using blue-white ([[#hw_configuration_using_dip_switches|HW configuration]]) switches placed next to the power connectors, or alternatively next to the RS485 on some models. Another option is configuration via Modbus registers ([[#sw_configuration_via_modbus_rtu|SW configuration]]). Configuration via DIP switches offers enough options for most applications, while configuration via Modbus registers provides broader possibilities (wider range of addresses and bitrates).
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   * **Parity:** None
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 ***SW configuration** of the module is used only when all address switches are set to 0 (OFF). Switch states are used only during the module's startup (connecting the power supply, SW reset, Master Watchdog).
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