Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 308 / 727

(D) Operation command and frequency command
PARAMETERS
307
5
GROUP
D
[Explanation of terms in table]
External (EXT) : Commands from external terminal are only valid.
NET : Commands via communication are only valid.
Combined : Command from both external terminal and communication is valid.
― : Command from either of external terminal and communication is invalid.
Compensation : Commands are valid only from external terminal signals when Pr.28 Multi-speed input compensation
selection = "1".
NOTE
• The command source of communication follows the Pr.550 and Pr.551 settings.
• The Pr.338 and Pr.339 settings can be changed while the inverter is running when Pr.77 = "2". Note that the setting change
is applied after the inverter has stopped. Until the inverter has stopped, communication operation command source and
communication speed command source before the setting change are valid.
 Command source switchover via external terminals (X67)
• In the Network operation mode, the start command source and speed command source can be switched over by the
command source switchover signal (X67). This can be used to control signal inputs from both the external terminals and via
communication.
• For the X67 signal, set "67" to any of Pr.178 to Pr.189 (Input terminal function selection) to assign the function to a
control terminal.
• When the X67 signal is OFF, the start command source and speed command source are given via control terminals.
NOTE
• The ON/OFF state of the X67 signal is applied only during a stop. When the terminals are switched during operation, the ON/
OFF state is applied after a stop.
• When the X67 is OFF, a reset via communication is disabled.
• Changing the terminal assignment using
Pr.178 to Pr.189 (Input terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
 Precautions for electronic bypass sequence function
• The response time of the inverter to the signals depends on the command source, NET or External.
After the communication with the inverter is established, the motor operation is performed according to the command via
NET. The commercial power supply operation with the motor is performed when the MRS signal turns ON before the
communication is established. It is recommended to turn the MRS signal ON after the communication is established.
Example: the response time of the inverter to the signals in the Network operation mode (power-ON). The command source
is External for the MRS signal and NET for the STF (STR) and CS signals.
??????? Parameters referred to
Pr.28 Multi-speed input compensation selection page 314
Pr.59 Remote function selection page 279
Pr.79 Operation mode selection page 291
X67 signal state Start command source Speed command source
Signal not assigned
According to Pr.338 According to Pr.339
ON
OFF
Commands from external terminals are only valid.
MRS(External)
STF(NET)
CS(NET)
Power supply
Communication status
Commercial
power supply
operation
Inverter operation
Until the communication with the inverter is established
From when the communication is established until the inverter receives a command
ON
ON
ON
ON
ON