Hengstler Signo 721.2 User Manual page 119

Display 2nd row:
Counter and control
inputs:
Input logic:
Reset/Set:
Formula: PSC = Desired (nominal) display / number of pulses
Example: Flowmeter 173 pulses per100 liters; display in liters
PSC = 100 / 173 = 0,5780
Example: 1 pulse per cm; display in inch
PSC = 1 / 2,54 = 0,3937
In display mode, the second display line is not used. In the programming mode the function
codes, presets, correction values, prescaler or signal times, which are programmed in the
first display line, are shown in the 2nd display line.
The counter is fitted with 3 counter and control inputs and, in addition, with an application
input (see below). These inputs are assigned various counter or control functions by means
of function code settings.
The input logic can be programmed to NPN or PNP, each at the
8V-level or TTL level; see Technical Data for the switching threshold.
Manual setting via keys (lockable)
Electronic setting via control input (and/or application input)
Automatic programming after reaching the main Preset
Depending on the function code the counter is:
1.) Reset: reset to 0
P 2 is the main Preset (preselect) value
During unidirectional counting the counter will add up
5 Describtion of the counter
119