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Last modified by writer on 2023/09/08 18:36
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1 ===== number, bool ReadModbusRegister(string name) =====
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3 Getting Modbus-register value.
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5 Options:
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7 * string name – the register name configured in the Modbus setup menu.
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9 Return values:
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11 * value – Modbus-register value. Returns the last successfully read value from the cache, refreshed at 100ms intervals (the frequency of updates may vary depending on certain conditions). Returns 0 if the value has never been successfully read;
12 * is_online – boolean value that determines whether the last attempt to read the value of the Modbus register was successful.
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14 ===== number, bool ReadModbusRegisterUpdated(string name) =====
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16 Getting Modbus-register value without cash. The register value is requested every time the command is invoked.
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18 Options:
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20 * string name – the register name configured in the Modbus setup menu.
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22 Return values:
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24 * value – Modbus-register value;
25 * is_online – boolean value that determines whether the last attempt to read the value of the Modbus register was successful.
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27 ===== bool WriteModbusRegister(string name, number value) =====
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29 Setting Modbus-register value.
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31 Options:
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33 * string name – register name configured in the Modbus setup menu;
34 * number value – the register value to be set (16-bit integer).
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36 Return value:
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38 * true – if the setting of the Modbus register value is successful.
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40 ===== number1, ... , numberN, bool ReadModbusMultipleRegistersUpdated(string name, number count) =====
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42 Getting values of several Modbus registers in a row without using a cache.
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44 Options:
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46 * string name – register name configures in the Modbus setup menu;
47 * number count – number of requested registers.
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49 Return values:
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51 * value1, ... , valueN – Modbus-register values;
52 * is_online – boolean value that determines whether the last attempt to read the value of the Modbus register was successful.
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54 ===== bool WriteModbusMultipleRegisters(string name, number count, number value1, ... , number valueN) =====
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56 Setting of several Modbus registers in a row.
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58 Options:
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60 * string name – register name configured in the Modbus setup menu;
61 * number count – number of registers to write;
62 * number value1, ... , number valueN – the register value to be set (16-bit integer).
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64 Return value:
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66 * true – if the setting of the Modbus register value is successful.