48
CHAPTER 7 – Programmation
SMT-BD2/m
The sequences linkage allows to create speed profiles.
Remark: "Next" = -1 corresponds to an empty field on the PC software.
4.4
-
TORQUE
SEQUENCE
A torque sequence is defined by:
- the speed set point
- the acceleration time (define the time with regard to the maximum speed parameter value, when the
speed set point is lower than the maximum speed, the acceleration time is proportionally reduced)
- the torque set point
- the torque holding time (delay).
Torque sequence execution:
In the torque control sequence, the motor is running at the speed set point value until the current raises up to the
limit value defined in percentage of the
Maximum current
parameter value. The motor running direction depends
on the sign of the speed set point. When the current limitation is reached, the amplifier is holding this current
during the time interval defined by the
Delay time
parameter. If the
Delay time
exceeds 16000 ms, the torque
holding time is infinite. In this case the sequence can be left by a stop condition.
The
Hold
triggering condition allows the outputs activation when the current limit is reached.
Sequence 1
Speed = 1500
Tacc = 2000
Time = 0
Tdec = 0
Next = 2
Sequence 2
Speed = 3000
Tacc = 3000
Time = 0
Tdec = 0
Next = 3
Sequence 3
Speed = 2000
Tacc = 3000
Time = 0
Tdec = 1500
Next = -1
Speed
Current
Acceleration (programmed time)
Torque holding (programmed delay)
Motor running (programmed speed)
Torque holding (programmed current)
Current limitation
(motor shaft locked)
