Refer to section 11.3.3 for more information regarding programmable pointer registers and their configuration.
10.7 Register Access Notes
This section contains some helpful notes and reminders that further detail the interface unit and drives’ behavior.
•Remember that drive registers and Modbus registers are offset by 1. Accessing the lowest valid Modbus register (0x0001) will access drive register 0x0000.
•The data values written to ASD registers that are configured as scan registers are not checked for range. Therefore, if a value outside the valid range of adjustment for a “write” scan register is written, the write will be acknowledged by the
•All register writes use the drive’s RAM / EEPROM data write (“W”) command except for those registers configured to be “write” scan registers, which use the drive’s RAM data write (“P”) command. For all writes that target the drive’s EEPROM, be sure to follow Toshiba’s guidelines regarding the number of times a specific register can be written without risk of EEPROM damage.
•For those drive families which do not have an explicit FREQUENCY MODE SELECTION or COMMAND MODE SELECTION parameter setting corresponding to the common serial channel (i.e. S7 and S9), remember that bits #14 and #15 of the communication command register (drive register 0xFA00) must be set to enable network frequency and network commands, respectively.
•For safety, when a new “write” scan register is entered, the
•Attempting to access a programmable pointer register that has not been configured with a register value (i.e. the “Points To…” field shows up blank on the configuration web page) will result in a Modbus 02 exception (ILLEGAL DATA ADDRESS).
31