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5.4 d: Reference Settings
240
YASKAWA ELECTRIC
SIEP C710636 02B YASKAWA U1000 Technical Manual
■
Speed Limitation and Speed Limit Bias
The speed limit setting is read from the input selected in parameter d5-03. A bias can be added to this speed limit using
parameter d5-05 while parameter d5-08 determines how the speed limit bias is applied.
explains the relation
between these settings.
Table 5.20 Speed Limit, Speed Bias and Speed Limit Priority Selection
■
Indicating Operation at the Speed Limit
A digital output can be programmed to close when the drives is operating at or beyond the speed limit (H2-
= 32).
Use this output to notify a PLC or some other control device of abnormal operating conditions.
■
Switching Between Torque and Speed Control
A digital input can be used to switch Torque Control and Speed Control (H1-
= 71). When switching from Speed
Control to Torque Control, the torque limit becomes the torque reference and the speed reference becomes the speed
limit. This change is reversed when switching back to Speed Control.
If required by the application, a delay time can be set up using parameter d5-06. The reference values (torque reference/
speed limit in Torque Control or speed reference/torque limit in Speed Control) are held during this switch delay time. Be
sure to change the reference values from the controller within this delay time.
Note: 1.
The speed/torque control switchover time d5-06 is not applied when the Stop command is entered. Here the operation switches
immediately to speed control and the drive decelerates to stop at the torque limit.
2.
Set d5-01 to 0 when switching between Torque Control and Speed Control. An oPE15 alarm will be triggered if parameter d5-01 is
set to 1 while H1-
is set to 71 at the same time.
<1> The value of delta n in the drawings depends on the ASR setting in parameters C5-
.
Operating Conditions
Run Command
Forward
Reverse
Forward
Reverse
Forward
Reverse
Forward
Reverse
Torque Reference
Direction
Positive (Forward) Negative (Reverse) Negative (Reverse) Positive (Forward) Positive (Forward) Negative (Reverse) Negative (Reverse) Positive (Forward)
Speed Limit
Direction
Positive (Forward) Negative (Reverse) Negative (Reverse) Positive (Forward) Positive (Forward) Negative (Reverse) Negative (Reverse) Positive (Forward)
Rotation Direction
Forward
Reverse
Forward
Reverse
Bidirectional Speed
Limit Bias
(d5-08 = 0)
Unidirectional
Speed Limit Bias
(d5-08 = 1)
Application Example
Winder
Unwinder
Speed
Torque
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed
Limit
Δ
n
Speed Limit
Bias d5-05
Speed Limit
Bias d5-05
Speed
Torque
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed
Limit
Δ
n
Speed Limit
Bias d5-05
Speed Limit
Bias d5-05
Δ
n
Speed
Torque
d5-05
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed Limit
Δ
n
Speed Limit
Bias d5-05
Speed
Torque
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed
Limit
Speed
Limit Bias
d5-05
Δ
n
Δ
n
Speed
Limit Bias
d5-05
Speed
Torque
Δ
n
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed
Limit Bias
d5-05
Speed
Limit
Δ
n
Speed
Torque
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed Limit
Bias d5-05
Speed
Limit
Δ
n
Δ
n
Δ
n
Speed
Torque
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed Limit
Bias d5-05
Speed Limit
Δ
n
Speed
Torque
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed
Limit
Speed
Limit Bias
d5-05
Δ
n
Δ
n
M
Torque
Torque
Line Direction
Line Direction
M
Speed
Speed
M
M
Torque
Line Direction
Line Direction
Speed
Torque Speed
SIEP_C710636_02B_1_0.book 240 ページ 2015年11月25日 水曜日 午後4時56分