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E6581222
7
■ Binary mode
(1) In binary mode, the start code is “2FH(/).”
The inverter rejects all data items entered before the “2FH(/).”
If two or more “2FH(/)” are entered, the “2FH(/)” entered last will be judged valid and all “2FH(/)”
entered before will be ignored.
If the “2FH(/)” is not recognized because of a format error or for any other reason, no error code
will be returned since the data is not recognized at all. In such cases, the inverter regards the
data received as a transmission error, rejects it and goes back into a start code wait state.
(2) If an inverter number is added behind the “2FH(/),” communications will take place only in case of
broadcast communication or if the number matches up with that assigned to the inverters. If not,
the inverter will go back into a start code wait state.
(3) The inverter stops receiving data on receipt of a command and the number of bytes of data
specified by the command.
If no command is found in the data received or if the specified number of bytes of data cannot be
received within about 0.5 seconds, the inverter will regard the data received as a transmission er-
ror and go back into a start code wait state.
(4) If no communications take place within the time specified using the timer function, the computer
will assume that a communication error has occurred and trip the inverter. The timer function is
disabled when the inverter is turned on or initialized. For details, see Section 7.3, “Timer func-
tion.”
(5) On executing the command received, the inverter returns data to the computer. For the response
time, see Appendix 2, “Response time.”
■ Note
Communication is not possible for about one second after the power is supplied to the inverter until
the initial setting is completed. If the control power is shut down due to an instantaneous voltage drop,
communication is temporarily interrupted.