[Feature Request]: Modbus: WORD, DWORD and LWORD array support

[IsmoLeszczynski]

What would you like to happen?

While having a look at the MSpec for Modbus, I noted that for some reason the WORD-variants of data types don't have List variants, unlike every other data type.

plc4x/protocols/modbus/src/main/resources/protocols/modbus/modbus.mspec

Lines 339 to 347 in a7ab2cf

	['WORD' WORD
	[simple uint 16 value]
	]
	['DWORD' DWORD
	[simple uint 32 value]
	]
	['LWORD' LWORD
	[simple uint 64 value]
	]

Is there any reason for this, or could they just be added to the MSpec? I ran in to this when implementing reading of single bits from multiple registers - my implementation used WORD with array dimensions as the data type for the ModbusTag when reading the registers, and I noticed that I only ever got a single register as the result. The immediate fix was to change to INT, but I don't see why the WORD variants wouldn't have array support as well.

Programming Languages

• plc4j
• plc4go
• plc4c
• plc4net

Protocols

• AB-Ethernet
• ADS /AMS
• BACnet/IP
• CANopen
• DeltaV
• DF1
• EtherNet/IP
• Firmata
• KNXnet/IP
• Modbus
• OPC-UA
• S7