xiii C H A P T E R 8 PLC Timer Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 164 8.1 Timer Instructions ............................................................................ 166 8.2 PLC Timer Instruction Registers..................................................... 168 8.3 Fixed Preset Value Non-Retentive ON-Delay Timer Instructions .... 169 8.4 Variable Preset Value Non-Retentive ON-Delay Timer Instructions......................................................................... 171 8.5 Retentive ON-Delay Timer Instructions .......................................... 173 8.6 OFF-Delay Timer Instructions ......................................................... 175 8.7 Interlocking Timers ........................................................................... 176 8.8 Cascading Timers to Increase the Timing Value ............................ 177 8.9 LogixPro Simulator Examples .......................................................... 178 C H A P T E R 9 PLC Counter Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188 9.1 PLC Counter Instructions ................................................................. 189 9.2 PLC Counter Instruction Registers .................................................. 189 9.3 PLC Count Up Instructions ..............................................................190 9.4 PLC Count Down Instructions ......................................................... 192 9.5 Connecting PLC Counter Instructions ............................................. 193 9.6 Cascading Counters .......................................................................... 195 9.7 Creating PLC Ladder Logic Diagrams with Counters and Timers ....196 9.8 LogixPro Simulator Examples ..........................................................196 C H A P T E R 10 PLC Math Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .208 10.1 Addition............................................................................................209 10.2 Subtraction....................................................................................... 211 10.3 Multiplication................................................................................... 213 10.4 Division ............................................................................................ 215 10.5 Advanced Math Instructions .......................................................... 216 10.6 LogixPro Simulator Examples........................................................ 218 C H A P T E R 11 PLC Compare, Jump, and MCR Instructions . . . . . . . . . . . . . . . 224 11.1 Compare Instructions ......................................................................226 11.2 Unconditional Jump ........................................................................229 11.3 Conditional Jump ............................................................................230 11.4 Master Control Reset (MCR)........................................................... 231 11.5 LogixPro Simulator Examples........................................................232 8 9 1 0 11