9 Application Instructions API 150-199 3. SA/SX/SC series MPU do not use this instruction and use special M and special D directly for the timer. a) Special M and special D are applicable when PLC RUN or STOP. b) When M1015 = On, the high speed timer D1015 will be enabled. The minimum timing unit of D1015: 100us. c) Timing range of D1015: K0 ~ K32,767. When the timing reaches K32,767, the next timing will restart from K0. d) When M1015 = Off, D1015 will stop the timing immediately. DVP-PLC Application Manual 9-132