Builds the reply a device sends to a read-holding-registers request.
This is the answering half of readHoldingRegisters, so a client can be written and tested against what a device sends without a device on the line.
The unit address the reply comes from.
The register values the device reports, in address order.
The frame the device would send.
If there are no values, or more than one frame can carry.
Builds the reply a device sends to a read-holding-registers request.
This is the answering half of readHoldingRegisters, so a client can be written and tested against what a device sends without a device on the line.