Precautions For Inverter Operation - YASKAWA SVC User Manual

10.3 Precautions for Inverter Operation

10.3

Precautions for Inverter Operation

This section provides precautions for Inverter operation.
Term
Operation When the CPU Stops
If CPU STOP is executed from the MP3000 while Inverter operation is in progress, the SVC
Function Module will force the Inverter to stop operation.
Even if the Forward RUN or Reverse RUN bit was set to 1 (ON) by the application, the bit will be
forced to 0 (OFF).
Bit 0 (Operation Ready) in IW
when it has stopped, click the Setting Parameter Tab to change the tab page, set Command

(OW
ting (OW
Timing of Changes to MECHATROLINK Allocations
Changes to settings made in the MECHATROLINK Detail Definition Dialog Box for the SVC
Function Module cannot be saved while Inverter operation is in progress. Save changes made
on the MECHATROLINK Detail Definition Dialog Box while the Inverter is stopped.
Timing of Changes to Fixed Parameters
The fixed parameters cannot be saved while Inverter operation is in progress. Save the fixed
parameters while the Inverter is stopped.
Switching between Motion Commands While the Command
Control Inverter Drive is Being Executed
If the Inverter Drive Control command in Command (OW08) is changed to another com-
mand while Inverter operation is in progress, the Inverter will maintain the last command status
of the Inverter Drive Control command and motor operation will continue. Note that switching
the command to NOP (No Command) also will not stop the motor.
Refer to the following section for the motor stopping methods.
Motor Stopping and Restarting Methods on page 10-15
Also, if you change the command, I/O between the SVC Function Module and Inverter will stop.
When that occurs, the monitor parameter data on the MPE720 will no longer be the most
recent data. If you change to any command other than the Transmission Reference command,
the Run status monitor information will be valid.
10-14
Inverter operation in progress:Either of the following bits in the M-III Inverter Command Status
(IL2A) monitoring parameter is 1 (ON): Bit 0 (Forward Operation) or Bit 1 (Reverse Opera-
tion). Even if the motor is stopped, Inverter operation is considered to be in progress if either of
these bits is ON.
Inverter operation stopped:Both of the following bits in the M-III Inverter Command Status
(IL2A) monitoring parameter are 0 (OFF): Bit 0 (Forward Operation) and Bit 1 (Reverse
Operation).

08) to No Command and then change bit D (Drive Permission) of Run Command Set-

00) to 1 (ON).
00 (Run Status) will also change to 0 (OFF). To start the CPU