Mitsubishi Electric A800 Plus Series Function Manual page 71

Dancer feedback speed control details
Line speed command (m/min)
Acceleration/deceleration
reference line speed command
Line speed command value
• The acceleration/deceleration time for the line speed command can be switched using the Acceleration/deceleration time
selection signals for line speed command (X105 and X106). For the X105 and X106 signals, assign the function by setting
"105 (X105)" or "106 (X106)" in any of Pr.178 to Pr.189 (input terminal function selection).
Signal state
X105 signal X106 signal
OFF OFF
ON OFF
─ ON
NOTE
• Normally set "0" in Pr.7 Acceleration time and Pr.8 Deceleration time.
Line speed command acceleration/deceleration signal (Pr.621, Y237
signal, Y238 signal)
• The Y237 signal is output while the line speed command value increases.
• The Y238 signal is output while the line speed command value decreases.
• When using the Y237 and Y238 signals, refer to the following and assign the functions by Pr.190 to Pr.196 (output
terminal function selection).
Output signal
Positive logic
Y237 237
Y238 238
Line speed command (m/min)
Line speed command value
NOTE
• When the line speed signal value fluctuates while analog input, etc. is used for the command, the Y237/Y238 signal may
repeat ON/OFF. Pr.621 Allowable deviation from target line speed can be used to prevent the repetitive ON/OFF
operation.
• When the command value for the target line speed and the setting in Pr.622 Line speed command for starting are close to
each other, the line speed increases and decreases repeatedly and the Y237/Y238 signal may repeat ON/OFF.
70
DANCER FEEDBACK SPEED CONTROL
(Pr.393)
Acceleration time
for line speed command
Pr.394 (Pr.100, Pr.102)
Acceleration/deceleration time
First acceleration/deceleration time
Second acceleration/deceleration time
Third acceleration/deceleration time
Pr.190 to Pr.196 setting
Negative logic
337
338
Pr.621
Pr.621
Y237
ON
Y238
Line speed command value
in consideration of
acceleration/deceleration
Deceleration time
for line speed command
Pr.395 (Pr.101, Pr.103)
Acceleration/deceleration time
setting parameter
Pr.394/Pr.395
Pr.100/Pr.101
Pr.102/Pr.103
Line speed command value
in consideration of
acceleration/deceleration
Pr.621
ON
Time
Time