Siemens SIMATIC ET 200SP Manual page 71

Configuring/address space
4.4 Fast Mode
Count direction
You use this parameter to specify the count direction for which the selected functions is
valid:
You can select from the following options:
Count direction
In both directions
Up
Down
The parameter can be configured for the following functions:
● Between comparison value 0 and 1
● At comparison value for a pulse duration
Pulse duration
With the parameter assignment of the pulse duration for the "At comparison value for a pulse
duration" function, you specify how many milliseconds the respective digital output is active.
If you enter "0" and the counter value corresponds to the respective comparison value, the
digital output is active until the next count pulse.
Hysteresis (in increments)
With the parameter assignment of the hysteresis, you specify a range around the
comparison values. Within the hysteresis range, the digital outputs cannot switch again
before the counter value has left this range.
An encoder can stop at a certain position, and slight movements can cause the counter
value to fluctuate around this position. If a comparison value or counting limit is within the
fluctuation range and a hysteresis is not used, the associated digital output will switch on and
off with corresponding frequency. The hysteresis prevents these unwanted switching actions.
Regardless of the hysteresis value, the hysteresis range ends at the low or counting high
limit. If you enter "0", the hysteresis is turned off.
70
Meaning
The comparison and switching of the respective digital output takes
places regardless of the count direction.
The comparison and switching of the respective digital output only
takes place when the counter counts up.
The comparison and switching of the respective digital output only
takes place when the counter counts down.
TM Count 1x24V (6ES7138‑6AA01‑0BA0) technology module
Manual, 07/2019, A5E33002339-AD