Table 7.1 (continued) 48 Name of the mode Input functions Principle of operation Illustration • if the setpoints have different signs (the first is greater than zero, and the second is smaller), then counter resets after reaching each setpoints t1, t3 – moments of the decrease in the value of the counting register (the appearance of the pulse at the counting input 2); t2 – moment of switching of output 2 in case of coincidence of values of the counting register and setpoint 2; t4 – moment of switching of output 1 in case of coincidence of values of the counting register and setpoint 1 Reversing count (inP = 5) Input 1 - count Input 2 - change counting direction (reverse) Input 3 - reset After the power is on, the device is in the "count-up" mode by default.
For reversing count it is necessary to apply signal to input 2. Thus there are two counting inputs: pulses on Input 1, lead to an increase in the value of the counter, the counting direction is changed cyclically with each incoming pulse on Input 2. In this case, two setpoints are used (after reaching each of them, the corresponding output switches):