SPLatco Knowledge Base

PresetMultRegs – 16, SlaveAddr, RegAddr16, ItemCount, SPAddr16, SPMode

A ModBus Master script command

When processed this command will result in the SPLat master sending out a ModBus function 6 query (Force multiple holding registers), then wait for the response.

Parameters are:

ItemBit LengthDescription
SlaveAddr8An 8-bit slave address
RegAddr1616The 16-bit, 0-based address of a holding register (4xxxx reference) in the slave.
ItemCount8An 8-bit count of how many 16-bit registers are to be written in the slave. The minimum is 1. The maximum is determined by available communications buffer size (documented elsewhere). ItemCount contiguous items will be written.
SPAddr1616A 16-bit RAM address within the SPLat master’s RAM.
NumberFormat8Specifies the number format sent from the slave, either byte (8 bits), word (16 bits, standard) or float together with the endianness of the value.