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55 lines
1.5 KiB
55 lines
1.5 KiB
<?php
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require_once dirname(__FILE__) . './Phpmodbus/ModbusMasterUdp.php';
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// Create Modbus object
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$modbus = new ModbusMasterUdp("192.168.1.99");
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// FC 3
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// read 10 words (20 bytes) from device ID=0, address=12288
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$recData = $modbus->readMultipleRegisters(0, 12288, 10);
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if(!$recData) {
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// Print error information if any
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echo "</br>Error:</br>" . $modbus->errstr . "</br>";
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exit;
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}
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// Received data
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echo "<h1>Received Data</h1>";
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print_r($recData);
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// Conversion
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echo "<h2>32 bits types</h2>";
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// Chunk the data array to set of 4 bytes
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$values = array_chunk($recData, 4);
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// Get float from REAL interpretation
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echo "<h3>REAL to Float</h3>";
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foreach($values as $bytes)
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echo PhpType::bytes2float($bytes) . "</br>";
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// Get integer from DINT interpretation
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echo "<h3>DINT to integer </h3>";
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foreach($values as $bytes)
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echo PhpType::bytes2signedInt($bytes) . "</br>";
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// Get integer of float from DINT interpretation
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echo "<h3>DWORD to integer (or float) </h3>";
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foreach($values as $bytes)
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echo PhpType::bytes2unsignedInt($bytes) . "</br>";
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echo "<h2>16 bit types</h2>";
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// Chunk the data array to set of 4 bytes
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$values = array_chunk($recData, 2);
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// Get signed integer from INT interpretation
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echo "<h3>INT to integer </h3>";
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foreach($values as $bytes)
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echo PhpType::bytes2signedInt($bytes) . "</br>";
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// Get unsigned integer from WORD interpretation
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echo "<h3>WORD to integer </h3>";
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foreach($values as $bytes)
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echo PhpType::bytes2unsignedInt($bytes) . "</br>";
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?>
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