ICC

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

50