Additional Functions - Siemens SIMATIC S7-1500 Manual

2.2.5

Additional functions

Synchronization for incremental and pulse encoder
You can configure the edge of an external reference signal that loads the counter with the
specified start value. The following external signals can trigger a synchronization:
● Rising or falling edge of a digital input
● Rising edge of signal N at the encoder input
● Rising edge of signal N at the encoder input depending on the level of the assigned digital
input
The "Frequency of synchronization" parameter specifies whether the function is executed at
each configured edge or only once after each enable.
Hysteresis
You can specify a hysteresis for the comparison values within which a digital output will be
prevented from switching again.
Diagnostic interrupt
The technology module can trigger diagnostic interrupts. You enable the diagnostic
interrupts in the device configuration.
Input filter
To suppress interference, you can configure an input filter for the RS422/TTL encoder inputs
and for the digital inputs.
Isochronous mode
The technology module supports the "Isochronous mode" system function. This system
function enables position, counter and measured values to be acquired in a defined system
cycle.
Technology module TM PosInput 2 (6ES7551-1AB00-0AB0)
Manual, 06/2018, A5E03982218-AB
Product overview
2.2 Functions
19