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Figure 49: Modbus TCP Register Remap Configuration
As an example, the configuration shown in Figure 49 reveals that a total of six
inverter registers have been remapped: register 1007 (command 1 word) has been
remapped to register 2001, register 1024 (command 2 word) has been remapped to
register 2002, register 1034 (torque command) has been remapped to register 2003,
register 1302 (inverter status 1) has been remapped to register 2004, register 1319
(torque) has been remapped to register 2005, and register 1306 (output voltage) has
been remapped to register 2006. With this configuration, it is now possible to
efficiently interact with these six non-contiguous inverter registers via just two
Modbus “read/write multiple registers” transactions. Writing to the command 1 word,
command 2 word and torque command can be accomplished with a single “write
multiple registers” transaction by writing a quantity of three registers starting at
register 2001. Similarly, reading the inverter status 1 word, torque and output
voltage (in that order) can be accomplished with a single “read multiple registers”
transaction by reading a quantity of three registers starting at register 2004.
10.10.4 Submitting Changes
Whenever the Modbus configuration has been
changed, the “submit” button located on the
right-hand portion of the web page must be
clicked in order to write these settings to the
interface card’s filesystem. Refer to Figure 50.
Note that because these configuration
elements are read from the filesystem only
when the interface card boots up, the act of
submitting configuration changes will also reset
the interface card. Please allow 30 seconds
for the interface card to reboot, at which time it
will then be operating with the recently-
submitted configuration.
Figure 50: Submit Configuration
Changes