
6.5 An order of command handshake
Command code
Command parameter
Request flag
End flag
Error status
Response data
(1) Application side : Check that request flag and end flag keep off, then write command code.
If necessary, parameter data should be written at same time. Then set the request flag turned
on. It does not matter that the writing of command code and turning on of request flag are
operated at the same scan.
(2) Converter side : If request flag turn on, the converter reads the contents of command and
operates it. After operation of command, converter sends on error status and receive data,
makes end flag turned on.
(3) Application side : Wait till end flag turn on. After turn on, read the error status. If no error
occurred and response data is included, read it. After operation, make request flag turned off.
(4) Converter side : After request flag turned off, the converter makes end flag turned off.
Execution of command
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DESCRIPTION DESIG. DATE
FANUC I/O Link-AS-i Converter
Connecting manual
-80906E