7 Application Instructions API 50-99 8. Pulse frequency detection for all series: 9. This instruction is mainly used for obtaining a proportional value of rotation speed. The result D and rotation speed will be in proportion. The following equation is for obtaining the rotation speed of motor. N: Rotation speed n: The number of pulses produced per rotation N= ( ) ( ) rpm 10 Ч nt 0 D 60 3 t: Detecting time designated in S 2 (ms) 10. The X input point designated by this instruction cannot be used again as the pulse input terminal of the high speed counter or as an external interruption signal. 11.
When M1036 in SC (V1.4 and above) series MPU is enabled, SPD instruction can detect the speeds at X0 ~ X5 at the same time with a total bandwidth of 40kHz. See 2.11 for more details for how to use M1036. 12. There is no limitation on the times of using this instruction in the program, but only one instruction will be 13. When SPD instruction is enabled and M1100 = On, SPD instruction will perform a sampling at the moment when executed at a time. M1100 goes from Off to On and stop the sampling. If you wish to resume the sampling, you have to turn Off M1100 and re-enable SPD instruction. Program Example: 1.
When X7 = On, D2 will calculate the high-speed pulses input by X1 and stop the calculation automatically after 1,000ms. The result will be stored in D0. 2. When the 1,000ms counting is completed, D2 will be cleared to 0. When X7 is On again, D2 will start the calculation again. X7 DVP-PLC APPLICATION MANUAL 7-26 MPU Max.
frequency ES/EX/SS (V5.7 and later versions) X1 (20kHz), X2 (10kHz) SA/SX/SC X0/X1 (4kHz), X1 (20kHz), X2 (10kHz) EH/EH2/SV X0 (200kHz), X1 (200kHz), X2 (10kHz), X3 (10kHz) EH3/SV2 X0/X1 (200kHz), X1 (200kHz), X2 ~ X3 (10kHz), X4/X5 (200kHz), X5 (20kHz), X6 ~ X7 (10kHz), X10/X11 (200kHz), X11 (20kHz), X12 ~ X13 (10kHz), X14/X15 (200kHz), X15 (20kHz), X16 ~ X17 (10kHz) SPD X1 K1000 D0