Контроллер DSE-7320 привожу выписку из его инструкции по Modbus
To use GENCOMM you will need to be familiar with the following principles, in addition to these items being supported by your modbus master system :
Half duplex, two wire twisted pair transmission lines
Hexadecimal and decimal conversion
Binary conversion and bit analysis
Signed and unsigned numbering
16 bit and 32 bit numbering
• ADDRESSING THE MODULEDSE controllers support the full modbus address range (0-65535 decimal, 0000-FFFFhexadecimal) therefore to address every register in the DSE module, the Modbus Master systemmust also support this address range.All DSE modbus registers are classified as Holding Registers. They can only be read usingmodbus function code 3 (Read Multiple Registers).
• 40000 suffixSome modbus masters use a suffix to the address as a way of specifying the function code to usefor the query.For example 41,029 is used to instruct the master to query address 1029 using function code 3.Some modbus masters also require you to add ‘1’ as previously described.This means that in many cases the master can read only up to DSE register 9999 (49999 is lastregister that will be read using function code 3).These modbus masters are therefore limited and cannot read the full list of registers from the DSEmodule.
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