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Figure 66: Controller Tags for I/O Access
We can directly interact with these tags in order to control and monitor the
drive. In Figure 66, we can see that the first 16-bit word of output data
(ASD_G9ETH:O.Data[0]) has been set to a hexadecimal value of 0xC400.
Referring back to Figure 36, we can see that the first element of the consumed
register configuration references register 1007, which is the drive’s option board
Command 1 register. A value of 0xC400, therefore, means that the frequency
priority, command priority, and run bits have been turned ON.
Similarly, we can see that the second 16-bit word of output data
(ASD_G9ETH:O.Data[1]) has been set to a decimal value of 1234. Once again
referring back to Figure 36, we can see that the second element of the
consumed register configuration references register 1008, which is the drive’s
option board frequency command register. A value of 1234, therefore, equates
to a frequency command of 12.34Hz.
The input data from the drive shows similar expected results. Values of 0x6404
and 1234 corresponding to registers 1402 (inverter status 1) and 1401 (output
frequency), respectively, are consistent with the drive running at the parameters
commanded by the output tag.