Specifications

SIMATIC Instructions
9-170
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
Table 9-21 Rising/Falling Edge Interrupts Supported
I/O Interrupts
S7-200 CPU
I/O Points I0.0 to I0.3
The high-speed counter interrupts allow you to respond to conditions such as the
current value reaching the preset value, a change in counting direction that might
correspond to a reversal in the direction in which a shaft is turning, or an external
reset of the counter. Each of these high-speed counter events allows action to be
taken in real time in response to high-speed events that cannot be controlled at
programmable logic controller scan speeds.
The pulse train output interrupts provide immediate notification of completion of
outputting the prescribed number of pulses. A typical use of pulse train outputs is
stepper motor control.
You can enable each of the above interrupts by attaching an interrupt routine to the
related I/O event.