Pulse counter Tachometer 6 Tachometer Function code F33, Display Row 1: 6.1 Tachometer Description (Supplementing the General Description given in Chapter 4) Lock Preset 2 0* P 2 Setting enabled 1 P 2 Setting locked / delayed Operation: A tachometer measures the period (PNP: time from one rising edge to the next one); NPN: time period from a falling edge to the next one), and converts and displays this time in 1/sec or 1/min. Function code F34, Display Row 1: 0* PSC setting enabled Tachometer Mode of Operation: The following modes of tachometer operation can be selected:
Unidirectional counting; Unidirectional counting with directional input; Differential counting, summation (totalizing); Phase discrimination (quad) with single, double or quadruple evaluation; Indication of ratio A/B and Indication of percentage (A-B) /A in % Lock Prescaler setting 1 PSC Setting locked / delayed Function code F35, Display Row 1: Lock Mode 0* 10 seconds delay Decimal point Tachometer mode of operation 0-4 (function code F1) The decimal point only serves for better legibility and does not change the va lue. Tachometer mode of operation 5 + 6 (function code F1) The decimal point is included in the calculation and increases the resolution.
1 Completely locked 2 Lock mode depends on keylock input Output signals Mode of operation: The tachometer uses the following limit values: P 1 and 2 are limit (range) signals Signal 1 is active at the displayed value of Signal 2 is active at the displayed value of > P 2 Signal 0 is active at the displayed value of > P 0; (application output) 54 55