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en:sw:01-mervis:connecting-to-unipi-extension-hidden [2020/06/16 07:33] avsetula |
en:sw:01-mervis:connecting-to-unipi-extension-hidden [2021/08/05 12:30] (current) avsetula |
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| The Unipi extensions are a convenient way how to extend the number of inputs and outputs at one location or make accessible at another one. | The Unipi extensions are a convenient way how to extend the number of inputs and outputs at one location or make accessible at another one. | ||
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| + | The communication between controller and extension is via RS485 ports. The extension acts as a Modbus slave, which has extended support in the Mervis. | ||
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| ;;# | ;;# | ||
| + | <html><span class="dev-tag dev-patron">Patron</span></html> \\ | ||
| + | <html><span class="dev-tag dev-neuron">Neuron</span></html> \\ | ||
| + | <html><span class="dev-tag dev-gate">Gate</span></html> \\ | ||
| <html><span class="dev-tag dev-axon">Axon</span></html> \\ | <html><span class="dev-tag dev-axon">Axon</span></html> \\ | ||
| - | <html><span class="dev-tag dev-neuron">Neuron</span></html> \\ | ||
| <html><span class="dev-tag dev-extens">Extension</span></html> | <html><span class="dev-tag dev-extens">Extension</span></html> | ||
| ;;# | ;;# | ||
| </WRAP> | </WRAP> | ||
| </WRAP> | </WRAP> | ||
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| - | The communication between controller and extension is via RS485 ports. The extension acts as a Modbus slave, which has extended support in the Mervis. | ||
| ===== HW connection ===== | ===== HW connection ===== | ||
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| {{:cs:sw:01-mervis:connecting-the-unipi-extension-01-hw-connection.png|}} | {{:cs:sw:01-mervis:connecting-the-unipi-extension-01-hw-connection.png|}} | ||
| - | For communication to work, you have to have identical serial port parameters on both sides - speed, data bits, stop bits and parity. Also, each extension unit has to have unique Modbus address. You can set those in two ways: by HW DIP switches or in the Mervis. | + | ===== Module addressing and communication parameters ===== |
| - | + | {{page>en:hw:04-extensions-communication-hidden}} | |
| - | ==== DIP switches ==== | + | |
| - | DIP switches are small levers with two positions - up or down. If the lever is pushed down, its specific function is enabled. | + | |
| - | + | ||
| - | {{:cs:sw:01-mervis:dipswitch.png|}} | + | |
| - | + | ||
| - | On all Extension models, the DIP switches allow for configuring bitrate, parity and address. | + | |
| - | + | ||
| - | <html><span class="kbBlueText">The RS485-END</span></html>, placed next to RS-485 connectors, is intended for attaching or unattaching an internal 120Ω resistor between RS485-A and RS485-B ports for a proper termination of the RS-485 bus. The resistor needs to be attached if the said module is the last device on the bus - this instruction applies mostly for large serial buses several hundred meters long. | + | |
| - | + | ||
| - | <html><span class="kbBlueText">Switches 1 to 3</span></html> serve for device addressing in a binary format, and can be used to set an address within 0-7 range. | + | |
| - | + | ||
| - | ^ Address ^ DIP no.1 ^ DIP no. 2 ^ DIP no. 3 ^ | + | |
| - | | 0 | OFF | OFF | OFF | | + | |
| - | | 1 | ON | OFF | OFF | | + | |
| - | | 2 | OFF | ON | OFF | | + | |
| - | | 3 | ON | ON | OFF | | + | |
| - | | 4 | OFF | OFF | ON | | + | |
| - | | 5 | ON | OFF | ON | | + | |
| - | | 6 | OFF | ON | ON | | + | |
| - | | 7 | ON | ON | ON | | + | |
| - | + | ||
| - | <html><span class="kbBlueText">DIP switch 4</span></html> configures the serial bus' bitrate. There are two bitrates available - **19200 bps** (''OFF'' position) and **9600 bps** (''ON'' position. | + | |
| - | + | ||
| - | <html><span class="kbBlueText">DIP switch 5</span></html> serves for switching between **even** parity (''OFF'' position) or **no** parity (''ON'' position). | + | |
| - | + | ||
| - | ==== Software settings ==== | + | |
| - | The connection parameters can be also set in Mervis. The HW settings take precedence, so to SW settings take place **you have to set the address to 0**. The rest will be described [[#reconfiguration_of_the_unipi_extension|later]] in this tutorial. | + | |
| ===== Using Unipi extension in the Mervis ===== | ===== Using Unipi extension in the Mervis ===== | ||
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| {{ :en:sw:01-mervis:connecting-the-unipi-extension-08-switch-to-commisioning.png?direct |}} | {{ :en:sw:01-mervis:connecting-the-unipi-extension-08-switch-to-commisioning.png?direct |}} | ||
| - | Next dialogue will ask you for the range of Modbus ID's the autodetect will look for. You can leave the default 1 - 15. | + | Next dialogue will ask you for the range of Modbus ID's the autodetect will look for. You can leave the default 1-15. |
| {{ :en:sw:01-mervis:connecting-the-unipi-extension-09-id-range.png?direct |}} | {{ :en:sw:01-mervis:connecting-the-unipi-extension-09-id-range.png?direct |}} | ||
