Mailbox function points, Reading a drive parameter, Writing to a drive parameter – Yaskawa P7 Metasys N2 User Manual
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Mailbox Function 5-3
Mailbox Function Points
Reading a Drive Parameter
Two points are defined for reading any drive parameter:
AO 30 Specifies the parameter to be read from the P7U drive
AI 38
Reports the value of the parameter specified in AO 30
When this point is read, it retrieves data from the parameter and sends it to the controller
Example:
Writing a value of 387 (183 hex) to AO 30 specifies drive parameter b1-04. Reading AI 38 returns the current setting of
parameter b1-04 to the controller
Writing to a Drive Parameter
Two points are defined for writing to any drive parameter:
AO 31 Specifies the parameter to be written to
AO 32 Entry location of the value to be written to the parameter specified in AO 31. When this point is written to, it will write
the value to the drive. An ENTER or ACCEPT command does not need to be sent for the data to be taken by the drive. The
behavior of the write is the same as with the digital operator. If the drive is running, there are a limited number of drive
parameters that can be written to.
Example:
Writing a value of 387 (183 hex) to AO 31 specifies drive parameter b1-04. Writing a value of 1 to AO 32 enables the drive for
reverse run.