C.7 Mailbox FunctionsThis section defines the APOGEE FLN points that read and write drive parameters.u Reading a Drive ParameterTwo points are defined for reading any drive parameter:• #70 Specifies the parameter to be read from• #71 Reports the value of the parameter specified in Point #70When this point is read, it retrieves data from the parameter and sends it to the controllerExample: Writing a value of 387 (183H) to Point #70 specifies drive parameter b1-04. Reading Point #71 returns the currentsetting of parameter b1-04 to the controller.u Writing to a Drive ParameterTwo points are defined for writing to any drive parameter:• #72 Specifies the parameter to be written to• #73 Entry location of the value to be written to the parameter specified in Point #72When 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 thedata to be taken by the drive. The behavior of the write is the same as with the HOA keypad. If the drive is running, there area limited number of drive parameters that can be written to.Example: Writing a value of 387 (183H) to Point #72 specifies drive parameter b1-04. Writing a value of 1 to Point #73 enablesthe drive for reverse run.C.7 Mailbox Functions280 YASKAWA SIEP YAIZ1U 03B YASKAWA AC Drive – Z1000 Programming Manual
