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Last modified by writer on 2022/08/18 15:25
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1 You will need a frequency converter (hereinafter referred to as the FC) with support for Modbus RTU control, such as Toshiba VF-S11, to control the spindle via Modbus via the PLCM-B1-G2 expansion board.
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3 Modbus spindle control setting procedure:
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5 1. Set FC to the control mode using the Modbus RTU protocol (RS-485) and remember the COM port settings in FC (count of bits per second, data bits, parity and stop bits).
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7 Example for Toshiba VF-S11.
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9 |=(% style="text-align: center; width: 150px;" %)Function code|=(% style="text-align: center; width: 100px;" %)Value|=(% style="text-align:center" %)Description
10 |(% style="width:150px" %)F800|(% style="width:100px" %)3|Transfer rate: 9600 bits per sec
11 |(% style="width:150px" %)F801|(% style="width:100px" %)1|Parity check enabled
12 |(% style="width:150px" %)F802|(% style="width:100px" %)1|Device number on the bus
13 |(% style="width:150px" %)F829|(% style="width:100px" %)1|Communication Protocol: Modbus RTU
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15 (% style="margin-left: 30.0px;" %)
16 2. Connect FC to the PLCM-B1-G2 expansion board via RS-485 interface.
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18 (% style="margin-left: 30.0px;" %)
19 3. Purchase the "[[MODBUS protocol support>>url:http://pumotix.ru/#soft||shape="rect"]]" option or activate a trial period for this option in the menu "Configuration" → "License Manager" → "Common".
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21 (% style="margin-left: 30.0px;" %)
22 4. Enable and configure Modbus in the menu "Configuration" → "Modbus Setup".
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24 Create new Modbus-master. Number of COM port is PLCM. The rest of the settings should be exactly the same as in the FC (in the screenshot, an example of a standard configuration of the COM port of Toshiba VF-S11).
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26 [[image:modbus_master_en.png||alt="master_plcm.png" data-xwiki-image-style-alignment="center" height="300" width="367"]]
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28 You need to add registers to control the FC and read statuses from FC. For example you need to configure registers named **SpindleMode**, **SpindleRPM** and **SpindleStatus**.
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30 We recommend using exactly these names, since in the future, registers will be accessed from background operations by their names.
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32 (% class="non-break" %)
33 |=(% style="text-align: center;" %)Name|=(% style="text-align: center;" %)Master|=(% style="text-align: center;" %)Address|=(% style="text-align: center;" %)Register|=(% style="text-align: center;" %)Register type
34 |SpindleMode|PLCM|1|64000|Output
35 |SpindleRPM|PLCM|1|64001|Output
36 |SpindleStatus|PLCM|1|64769|Input
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38 {{success}}
39 Register numbers must be specified as decimal values.
40 {{/success}}
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42 {{warning}}
43 These values ​​can be indicated in HEX (hexadecimal) in the instructions for the frequency converter. For example, 0x1001, 0x1002.
44 {{/warning}}
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46 (% style="margin-left: 30.0px;" %)
47 5. Create new background operation (macro) through [[the macro manager>>doc:Руководство пользователя.Описание M-кодов.Управление макросами и фоновыми операциями.WebHome]].
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49 The main task of the background macro is to monitor the current state and spindle speed and send the values to the frequency converter via Modbus.
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51 An example of background operation **modbus_spindle.bm** for ModBus spindle control via FC Toshiba VF-S11 posted in attachment. This file must be added to background operations list.
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53 **[[Download background operation>>attach:modbus_spindle.zip]]**
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55 {{warning}}
56 Access to Modbus registers from macros is done by the name of the Modbus register case sensitive! For example **SpindleRPM** and **SpindleRpm** are different registers.
57 {{/warning}}
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59 (% style="margin-left: 30.0px;" %)
60 6. Enable the background operation. Make sure that the operation has started and is working properly. This will be indicated by the green indicator to the right of the operation name.
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62 [[image:Macros_Manager_wndw.png||alt="2021-11-29 14_18_03-Управление макросами.png" data-xwiki-image-style-alignment="center" height="500" width="681"]]
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64 The spindle should now turn on and off if everything is configured correctly. The spindle speed accordingly must also change at the FC when it changing in PUMOTIX.