Bachelorthesis/Modbus/include/ModbusCommonStructs.cin

/*@!Encoding:1252*/
variables
{
	// A normal Modbus Application Header. Every Modbus Packet begins with these 7 (+FuncCode) Bytes
	struct ModbusApHeader
	{
		word TxID;
		word Protocol;
		word Length;
		byte UnitID;
		byte FuncCode;
	};
	// Read Data from the host. We only need the start address and the number of bits/registers we want to read
	struct ModbusReqRead
	{
		struct ModbusApHeader Header;
		word Address;
		word Count;
	};
	// Write a single value to a bit/register
	struct ModbusReqWriteSingle
	{
		struct ModbusApHeader Header;
		word Address;
		word Value;
	};
	// Write several values to a bit/register starting with Address
	struct ModbusReqWriteBits
	{
		struct ModbusApHeader Header;
		word Address;
		word Count;
		byte ByteCount;
		byte Data[246];		// Max length: 1968 bits
	};
	// Write several values to bits starting with Address
	struct ModbusReqWriteRegisters
	{
		struct ModbusApHeader Header;
		word Address;
		word Count;
		byte ByteCount;
		int Data[123];		// Max length: 123 registers
	};

	// Receive several bit values
	struct ModbusResReceiveBits
	{
		struct ModbusApHeader Header;
		byte ByteCount;
		byte Data[250];		// Max length: 2000 bits
	};
	// Receive several register values
	struct ModbusResReceiveRegisters
	{
		struct ModbusApHeader Header;
		byte ByteCount;
		int Data[125];		// Max length: 125 registers
	};
	// Confirm the write of a single bit/register
	struct ModbusResConfirmSingle
	{
		struct ModbusApHeader Header;
		word Address;
		int Value;
	};
	// Confirm the write of several bits/registers
	struct ModbusResConfirmMultiple
	{
		struct ModbusApHeader Header;
		word Address;
		word Count;
	};
}