12. Communication Design Examples 12.5 Communication between PLC and Delta ASD-A Series AC Servo Drive (Speed Control, MODRD/MODRW) AC servo drive control panel Power normal Start normal Speed reached Servo ON Speed switching SON SPD0 SPD1 Wiring for Delta ASD-A Series AC Servo Drive: Power normal Start normal SPD0 SPD1 Control Purpose: z Reading rotation speed of servo motor and storing it in D0 by MODRD instruction. z Controlling the motor to rotate in 2 fixed speeds or specified speed by MODRW instruction together with switches SPD0 and SPD1. z Definitions of the speed switches of AC servo drive:
DVP-PLC Application Examples 12-18 s AC power CN1 VDD COM+ N DI1 0 DI3 1 D14 COM- L1 Delta AC servo drive U L2 ASDA series V R W S T 7 6 24V 17 5 11 4 4.7K 9 4.7K 34 4.7K 8 45 Error counter Electric gear Servo m CN1 24V DO1+ DO1- 24V DO2+ DO2- CN2 Enco CN1 7 DO1+ 6 DO1- 5 DO2+ VDD 17 COM+ DI1 11 9 4.7 4.7 K K DI3 D14 34 8 4.7 K COM- 45 SPD0 SPD1 Function Status Status ON OFF SPD0 ON: selecting the first speed set in P1-09 (determined by the content in D9, fixed as K1500 in this program. The rotation speed of the motor: 1500 r/min. Direction: forward.) OFF ON SPD1 ON: selecting the second speed set in P1-10 (determined by the content in D10, fixed as K-1500 in this program.
The rotation speed of the motor: 1500 r/min. Direction: reverse.) ON ON SPD0 and SPD1 ON: selecting the third speed set in P1-11 (determined by the content in D11. The rotation speed of the motor is specified by user with the content in D11.