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feat: Added support for UINT16 in hex encoding. #23

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Merged
paulorb merged 1 commit into from
Oct 9, 2025
Merged

feat: Added support for UINT16 in hex encoding. #23

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57 changes: 57 additions & 0 deletions examples/test-simulation.xml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,57 @@
<?xml version="1.0" encoding="UTF-8"?>
<device ip="0.0.0.0" port="5002">
<configuration initializeUndefinedRegisters="true" initialValue="0">
<registers>
<!-- BOOL: True -->
<register addressType="HOLDING_REGISTER" address="0" datatype="UINT16" symbol="bool_val">0x0001</register>
<!-- BYTE: 42 -->
<register addressType="HOLDING_REGISTER" address="1" datatype="UINT16" symbol="byte_val">0x002A</register>
<!-- WORD: 42424 -->
<register addressType="HOLDING_REGISTER" address="2" datatype="UINT16" symbol="word_val">0xA5B8</register>
<!-- DWORD: 4242442424 -->
<register addressType="HOLDING_REGISTER" address="3" datatype="UINT16" symbol="dword_val_1">0xFCDE</register>
<register addressType="HOLDING_REGISTER" address="4" datatype="UINT16" symbol="dword_val_2">0x88B8</register>
<!-- LWORD: 4242442424242424242 -->
<register addressType="HOLDING_REGISTER" address="5" datatype="UINT16" symbol="lword_val_1">0x3AE0</register>
<register addressType="HOLDING_REGISTER" address="6" datatype="UINT16" symbol="lword_val_2">0x2EE8</register>
<register addressType="HOLDING_REGISTER" address="7" datatype="UINT16" symbol="lword_val_3">0x4D04</register>
<register addressType="HOLDING_REGISTER" address="8" datatype="UINT16" symbol="lword_val_4">0x49B2</register>

<!-- Signed/unsigned integers -->
<!-- SINT: -42 -->
<register addressType="HOLDING_REGISTER" address="9" datatype="UINT16" symbol="sint_val">0xFFD6</register>
<!-- USINT: 42 -->
<register addressType="HOLDING_REGISTER" address="10" datatype="UINT16" symbol="usint_val">0x002A</register>
<!-- INT: -2424 -->
<register addressType="HOLDING_REGISTER" address="11" datatype="UINT16" symbol="int_val">0xF688</register>
<!-- UINT: 42424 -->
<register addressType="HOLDING_REGISTER" address="12" datatype="UINT16" symbol="uint_val">0xA5B8</register>
<!-- DINT: -242442424 -->
<register addressType="HOLDING_REGISTER" address="13" datatype="UINT16" symbol="dint_val_1">0xF18C</register>
<register addressType="HOLDING_REGISTER" address="14" datatype="UINT16" symbol="dint_val_2">0xF18C</register>
<!-- UDINT: 4242442424 -->
<register addressType="HOLDING_REGISTER" address="15" datatype="UINT16" symbol="udint_val_1">0xFCDE</register>
<register addressType="HOLDING_REGISTER" address="16" datatype="UINT16" symbol="udint_val_2">0x88B8</register>
<!-- LINT: -4242442424242424242 -->
<register addressType="HOLDING_REGISTER" address="17" datatype="UINT16" symbol="lint_val_1">0xC51F</register>
<register addressType="HOLDING_REGISTER" address="18" datatype="UINT16" symbol="lint_val_2">0xD117</register>
<register addressType="HOLDING_REGISTER" address="19" datatype="UINT16" symbol="lint_val_3">0xB2FB</register>
<register addressType="HOLDING_REGISTER" address="20" datatype="UINT16" symbol="lint_val_4">0xB64E</register>
<!-- ULINT: 4242442424242424242 -->
<register addressType="HOLDING_REGISTER" address="21" datatype="UINT16" symbol="ulint_val_1">0x3AE0</register>
<register addressType="HOLDING_REGISTER" address="22" datatype="UINT16" symbol="ulint_val_2">0x2EE8</register>
<register addressType="HOLDING_REGISTER" address="23" datatype="UINT16" symbol="ulint_val_3">0x4D04</register>
<register addressType="HOLDING_REGISTER" address="24" datatype="UINT16" symbol="ulint_val_4">0x49B2</register>

<!-- Floating point values - also start at 0 -->
<!-- REAL: 3.141593 -->
<register addressType="HOLDING_REGISTER" address="25" datatype="UINT16" symbol="real_val_1">0x4049</register>
<register addressType="HOLDING_REGISTER" address="26" datatype="UINT16" symbol="real_val_2">0x0FDC</register>
<!-- LREAL: 2.71828182846 -->
<register addressType="HOLDING_REGISTER" address="27" datatype="UINT16" symbol="lreal_val_1">0x4005</register>
<register addressType="HOLDING_REGISTER" address="28" datatype="UINT16" symbol="lreal_val_2">0xBF0A</register>
<register addressType="HOLDING_REGISTER" address="29" datatype="UINT16" symbol="lreal_val_3">0x8B14</register>
<register addressType="HOLDING_REGISTER" address="30" datatype="UINT16" symbol="lreal_val_4">0x5FCF</register>
</registers>
</configuration>
</device>
11 changes: 8 additions & 3 deletions src/main/kotlin/PlcMemory.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -26,11 +26,16 @@ class PlcMemory(configurationParser: ConfigurationParser) : IModbusServerEventL
holdingRegister[register.address.toInt()] = lowWord.toShort()
holdingRegister[register.address.toInt() + 1] = highWord.toShort()
}else if(register.datatype == "UINT16"){
holdingRegister[register.address.toInt()] = register.value.toUShort().toShort()
// Check if the value starts with "0x", if it does, interpret it as Hex value.
if(register.value.startsWith("0x", ignoreCase = true)){
val hex = register.value.substring(2)
val parsed = hex.toUInt(16).toInt() and 0xFFFF
holdingRegister[register.address.toInt()] = parsed.toShort()
} else {
holdingRegister[register.address.toInt()] = register.value.toUShort().toShort()
}
}else
holdingRegister[register.address.toInt()] = register.value.toShort()


}
AddressType.COIL -> coils[register.address.toInt()] = (register.value.toInt() == 1)
AddressType.DISCRETE_INPUT -> inputStatus[register.address.toInt()] = (register.value.toInt() == 1)
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