Chapter 7 Usage of Various Functions
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(2) Speed Control (Uniform Speed Operation)
• This controls the speed by the setting speed until deceleration stop command(POSCTR) is entered after execution by
POSVEL command..
• The speed can be changed by the speed override instruction(POSSOR)
• Speed control contains 2 types of start method : Forward direction start and Reverse direction start.
- Forward direction : when position address is positive number (+) (“0” included)
- Reverse direction : when position address is negative number (-)
Forward direction Reverse direction
Set second operand of POSVEL instruction to 0 Set second operand of POSVEL instruction to 1
• Timing diagram
Please refer to the ‘7.3.4 Instruction’ for details.
Speed
On
Time
On
Setting speed
Dwell time
Deceleration stop command
(POSCTR)
Speed control command
(POSVEL)
Remark