2 Functions of Devices in DVP-PLC SA/SX/SC series MPU: DVP-PLC Application Manual 2-2 Type Device Item Range Function Relay (bit) X External input relay X0 ~ X177, 128 points, octal Total 256 points Corresponds to external input points Y External output relay Y0 ~ Y177, 128 points, octal Corresponds to external output points M Auxiliary Relay General purpose M0 ~ M511, 512 points (*1) Total 4,096 points The contact can be On/Off in the program.
Latched* M512 ~ M999, 488 points (*3) M2000 ~ M4095, 2,096 points (*3) Special purpose M1000 ~ M1999, 1,000 points (some are latched) T Timer 100ms T0 ~ T199, 200 points (*1) T192 ~ T199 for subroutine T250 ~ T255, 6 accumulative points (*4) Total 256 points Timer indicated by TMR instruction. If timing reaches its target, the T contact of the same No. will be On. 10ms T200 ~ T239, 40 points (*1) T240 ~ T245, 6 accumulative points (*4) 1ms T246 ~ T249, 4 accumulative points (*4) C Counter 16-bit counting up C0 ~ C95, 96 points (*1) C96 ~ C199, 104 points (*3) Total 235 points Counter indicated by CNT (DCNT) instruction. If counting reaches its target, the C contact of the same No.
will be On. 32-bit counting up/down C200 ~ C215, 16 points (*1) C216 ~ C234, 19 points (*3) For SA/SX, 32-bit high-speed counter C235 ~ C244, 1-phase 1 input, 9 points (*3) C246 ~ C249, 1-phase 2 inputs, 3 points (*3) C251 ~ C254, 2-phase 2 inputs, 4 points (*3) Total 16 points For SC, 32-bit high-speed counter C235 ~ C245, 1-phase 1 input, 11 points (*3) C246 ~ C250, 1-phase 2 inputs, 4 points (*3) C251 ~ C255, 2-phase 2 inputs, 4 points (*3) Total 19 points S Step point Initial step S0 ~ S9, 10 points (*1) Total 1,024 points Used for SFC.
Zero return S10 ~ S19, 10 points (used with IST instruction) (*1) General purpose S20 ~ S511, 492 points (*1) Latched* S512 ~ S895, 384 points (*3) Alarm S896 ~ S1023, 128 points (*3) Register (word data) T Present value of timer T0 ~ T255, 256 points When the timing reaches the target, the contact of the timer will be On. C Present value of counter C0 ~ C199, 16-bit counter, 200 points C200 ~ C254, 32-bit counter, 50 points (SC: 53 points) When the counting reaches the target, the contact of the counter will be On. D Data register General purpose D0 ~ D199, 200 points (*1) D5000~D9999, 5,000 points (*1) (Only supported by SX v.3.0 and above) Total 5,000 points (SX v.3.0 and above:
10,000 points) Memory area for data storage; E, F can be used for index indication. Latched* D200 ~ D999, 800 points (*3) D2000 ~ D4999, 3,000 points (*3) Special purpose D1000 ~ D1999, 1,000 points Index indication E0 ~ E3, F0 ~ F3, 8 points (*1) N/A File register K0 ~ K1,599 (1,600 points) (*4) Expanded register for data storage.