From the manufacturer manual
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Generator controllers
DSE7320 MKII
140 registers
The DSE7320 MKII is an automatic mains (utility) failure control module with RS232 and RS485 Modbus RTU ports. DSE's operator manual says the module register table is available on request, so this map uses DSE's GenComm register standard (document SP-228, titled DSE7310 GENCOMM), which defines the registers by page. It covers communications status, generating set status, basic, extended and derived instrumentation, accumulated counters, system control keys, identity strings and the named alarm conditions. The document is shared by many DSE families and does not list per model which registers the DSE7320 MKII implements, so unimplemented registers return the sentinel values described in the document. The document never names the DSE7320 MKII: the rows are chosen from its allocations headed 72xx/73xx and 72xx/73xx/61xx/74xx MKII (page 154), the generic 8xxx/7xxx/6xxx allocation (pages 6 and 7) and the all-product tables, and applying them to the 7320 MKII is an inference from those family headings. Register values for read-only flags on registers 256, 259 and 264 follow the document's note for 72xx/73xx modules. Identity strings are listed as read only, but the document says they may be read/write or read only depending on the product.
All register maps · Modbus Poll