YASKAWA T1000A - Page 160

5.4 d: Reference Settings
160 YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
n 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.
n
Switching Between Torque and Speed Control
A digital output 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 switching delay 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.
Figure 5.42
Figure 5.42 Speed/Torque Control Switching Time
n d5-01: Torque Control Selection
Setting 0: Disabled
Speed Control will be active. Also use this setting when H1- = 71 (Speed/Torque Control Switch).
Generated Torque
(d5-08 = 1)
<1>
Application Example
Winder
Unwinder
<1> The value of delta n in the drawings depends on the ASR setting in parameters C5-.
No. Parameter Name Setting Range Default
d5-01 Torque Control Selection 0 or 1 0
Operating Conditions
Speed
Torque
Δn
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed
Limit Bias
d5-05
Speed
Limit
Δn
Speed
Torque
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed Limit
Bias d5-05
Speed
Limit
Δn
Δn
Δn
Speed
Torque
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed Limit
Bias d5-05
Speed Limit
Δn
Speed
Torque
Torque
Limit
Internal
Torque
Reference
0
Torque
Limit
Speed
Limit
Speed
Limit Bias
d5-05
Δn
Δn
M
Torque Torque
Line Direction
Line Direction
M
Speed Speed
M
M
Torque
Line Direction
Line Direction
Speed Torque Speed
d5-06
Speed/Torque control
input (H1- = 71)
Run command
OFF
ON OFF
ON
d5-06
OFF
ON
Operation Mode
Speed Control Torque Control Speed Control Torque Control
Frequency refernce
signal or d5-04
Speed Ref. Speed Limit Speed Ref. Speed Limit
Torque LimitTorque Limit Torque Reference Torque Reference
Speed Control
d5-06
Speed Ref.
Torque Limit
Torque reference signal/
Torque limit