Addressing of Siemens PLC S7 200 Digital Input I0.0 to I0.11 Digital Output Q0.0 to Q0.7 Analog Input IW0 Analog Output QW0 Timers T32 to T63 For Timers : Time Delay = Time Base * Preset Time Done Bit : Tx Where X is address of Timer used. Counters C0 to C63 For Counter: Preset is number of Counts. Counter Done Bit : Cx Where X is address of counter used. Integer VW0 to VW1022 Binary V0.0 to V1023.7 Programming Software : Microwin Driver For Programming: PPI Driver. Driver For SCADA Communication : S7200PPI DDE