LG Electronics 120S user manual Speed Control Uniform Speed Operation

Chapter 7 Usage of Various Functions

(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

Speed

Setting speed

Dwell time

Time

On

Speed control command (POSVEL)

On

Deceleration stop command (POSCTR)

Remark

Please refer to the ‘7.3.4 Instruction’ for details.

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