Data Used For Control; Follow Up Function - Mitsubishi Electric MELSEC Q Series User Manual

10 FUNCTION DETAILS

10.1.2 Data used for control

Symbol
Input/output
⎯
signal
Control data Cd.30

10.1.3 Follow up function

POINT
• If the servomotor is rotated by external force during the servo OFF status, the
follow up processing is executed.
• An "error code 1702" will occur and the operation does not start, if the OPR
control, positioning control or manual control is started in servo OFF,.
• An "error code 1703" will occur and the servo OFF can be executed after sudden
stop. If the servo OFF is executed in the positioning, The positioning interrupted
by servo OFF cannot be resumed even if the servo OFF is executed again.
• When the servo OFF is executed to all axes, "All axis servo ON signal [Y1]" is
applied even if all axis servo ON command is turned ON to OFF with "
Each axis servo OFF" set "0".
Set the following data for the servo ON/OFF.
Refer to Section "5.1 Specifications of Input/Output Signals" and Section 6.3 to 6.8 for
the buffer memory address and details.
Items
All axis servo ON signal [Y1]
Each axis servo OFF
If the servomotor is rotated by external force during the servo OFF status, the follow
up processing is executed.
The follow up processing monitors the number of motor rotations (real current value)
with the servo OFF and reflects the value in the "Current feed value ".
Therefore, even if the servomotor rotates while the servo OFF, the servomotor will not
just rotate for the quantify of droop pulses the next time the servo turns ON but
positioning can be performed from the stop position.
POINT
• The follow up processing is executed if "QD74MH and the servo amplifier is
turned ON" and "servo OFF" regardless of the presence of the absolute position
system.
The servo for all servo amplifiers connected to the QD74MH is turned
ON or OFF.
Execute the servo ON/OFF for each axis.
10 - 2
MELSEC-Q
Cd.30
Details