Additional Functions - Siemens SIMATIC ET 200SP Manual

Product overview
2.2 Functions
2.2.5

Additional functions

Hardware interrupts
The technology module can trigger a hardware interrupt in the CPU, for example, if a
compare event occurs, in the event of overflow or underflow, in the event of a zero crossing
of the counter and/or of a change of count direction (direction reversal). You can specify
which events (Page 39) are to trigger a hardware interrupt during operation.
Diagnostic interrupt
The technology module can trigger a diagnostic interrupt in the event of a missing supply
voltage or an error at the digital outputs, for example. Select the diagnostic interrupts
(Page 37) in the device configuration freely.
Input filter
To suppress interference, you can configure an input filter for the 24 V encoder inputs and
for the digital inputs.
Distributed application
You can use the technology module in a distributed system by means of an interface module
in the ET 200SP distributed I/O device. The following applications are possible:
● Distributed operation in an S7-1500 system
● Distributed operation in an S7-1200 system
● Distributed operation in an S7-300/400 system
● Distributed operation in a third-party system
Isochronous mode
The technology module supports the system function "Isochronous mode". This system
function enables counter values and measured values to be acquired in a defined system
cycle.
In isochronous mode, the cycle of the user program, the transmission of the input signals
and processing in the technology module are synchronized. The output signals switch
immediately if the relevant comparison condition is met. A change in the state of a digital
input immediately affects the planned reaction of the technology module and changes the
status bit of the digital input in the feedback interface (Page 29).
Data processing
The data that was transmitted to the technology module in the current bus cycle via the
control interface takes effect when it is processed in the internal technology module cycle.
The counter value and the measured value as well as status bits are captured at time T
made available in the feedback interface for retrieval in the current bus cycle.
In isochronous mode, there is always data consistency across all bytes in the feedback
interface.
16
Technology Module TM Count 1x24V (6ES7138‑6AA00‑0BA0)
Manual, 10/2013, A5E33002339-AA
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