7 Application Instructions API 50-99 The example program of the instruction delay: M1002 M0 T0 D1 D0 > D1 D0 D1 D0 = M10 D0 D1 > M12 M0 Application 2 Speed control system and pressure control system work individually (use diagram of Example 2). Purpose: After the speed control operates in open loop for a period of time, adding into it the pressure control system (PID instruction) for close loop control. Explanation: Since the speed and pressure control systems are not interrelated, we have to structure an open loop for speed control first following by a close loop pressure control.
If you fear that the control instruction of the pressure control system changes too fast, you can consider adding the instruction delay illustrated in Application 1 into the control. See the control diagram below. 0 M3 M2 = On 255 Speed instruction D40 + D32 D1116 Speed converted to voltage AC motor drive D30 D31 + 0rpm 3,000rpm MV converted to accel/decel value D1 SV D0 M0 = On PV MV D5 Pressure instruction Delay (optional) PID D1110 Pressure meter M1 = On DVP-PLC APPLICATION MANUAL 7-143 002 MOV K10 D3 TMR T0 D3 RST T0 MOV K50 D2 MOV K-50 D2 MOV K0 D2 ADD D2 D1 D1 CMP D2 K0 M10 MOV D0 D1 MOV D0 D1 PID D1 D1116 D10 D5