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Last modified by writer on 2023/02/20 13:47
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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 Sunfar E500, 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 Sunfar E500.
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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" %)F0.00|(% style="width:100px" %)2|Frequency reference source - external data transfer
11 |(% style="width:150px" %)F0.02|(% style="width:100px" %)0002|Trigger channel selection - serial data port
12 |(% style="width:150px" %)F4.00|(% style="width:100px" %)0114|Data transfer settings - speed selection: 9600 bps, parity check, Modbus data transfer protocol
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14 (% style="margin-left: 30.0px;" %)
15 2. Connect FC to the PLCM-B1-G2 expansion board via RS-485 interface.
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17 (% style="margin-left: 30.0px;" %)
18 3. Purchase the "[[MODBUS protocol support>>http://pumotix.ru/#soft]]" option or activate a trial period for this option in the menu "Configuration" → "License Manager" → "Common".
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20 (% style="margin-left: 30.0px;" %)
21 4. Enable and configure Modbus in the menu "Configuration" → "Modbus Setup".
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23 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 Sunfar E500).
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25 [[image:modbus_master_en.png||alt="master_plcm.png" data-xwiki-image-style-alignment="center" height="300" width="367"]]
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27 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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29 We recommend using exactly these names, since in the future, registers will be accessed from background operations by their names.
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31 (% style="text-align:center" %)
32 [[image:Modbus_Settings_example_E500.png||alt="registers_plcm.png" data-xwiki-image-style-alignment="center" height="444" width="1000"]]
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34 {{success}}
35 Register numbers must be specified as decimal values.
36 {{/success}}
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38 {{warning}}
39 These values ​​can be indicated in HEX (hexadecimal) in the instructions for the frequency converter. For example, 0x1001, 0x1002
40 {{/warning}}
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43 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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45 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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47 An example of [[background operation>>doc:Руководство пользователя.Описание фоновых операций.Создание фоновой операции.WebHome]] **modbus_spindle.bm** for ModBus spindle control posted in attachment. This file must be added to background operations list.
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49 **[[Download background operation>>attach:modbus_spindle (1).bm]]**
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51 {{warning}}
52 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.
53 {{/warning}}
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55 (% style="margin-left: 30.0px;" %)
56 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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58 (% style="text-align:center" %)
59 [[image:Macros_Manager_wndw.png||alt="2021-11-29 14_18_03-Управление макросами.png" data-xwiki-image-style-alignment="center" height="400" width="544"]]
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61 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.