Kendrion Kuhnke Automation GmbH
Counter/Posi2, Counter2
49
11/25/2016
4.13.3 Function
The module Counter2 has 2 identical channels.
Each channel has terminals for 1 encoder and 4 digital inputs and 1 digital
output.
The Counter/Posi2 module has 1 additional analog output.
There are structured groups of variables for:
1. Controlling and watching the entire module:
•
Modul Kontrolle/Modul Status (Module control/Module status)
2. Controlling and watching of Counter 1 resp. 2:
•
Optionen/Kontrolle/Status/Fehler (Options/Control/Status/Errors)
3. Counter values of Counter 1 resp. 2:
•
Sollwerte/Istwerte (Set values/Current values)
4. State of the digital IOs of Counter 1 resp. 2:
•
Digitale Ausgänge/Digitale Eingänge/Eingangsflanken-
Zeitstempel/Ausgangsverzögerung
(Digital Outputs/Digital Inputs/Input change time stamp/ output delay)
Principle of Kontrolle (Control) and Status:
If a control bit is set (=TRUE), the module will operate the corresponding
function due to the rising edge of the bit.
The module indicates the execution of the function by setting the
corresponding status bit (=TRUE). When the control bit is reset (=FALSE)
the module will also reset the status bit (=FALSE).
In the following the functions of the counter module are described by
counter 1. For counter 2 the data are valid accordingly.
4.13.3.1 Frame- or DC-synchronous mode
Dependent on whether Distributed Clocks (DC) are used or not, the module
adjusts itself independently on the suitable mode of operation. The module is
preset on Frame synchronous mode. With the receipt of the first DC
telegram the module is changed over to DC-synchronous mode and
maintains this mode of operation up to next switching off.
4.13.3.1.1 Frame-synchronous
The EtherCAT master sends EtherCAT frames with the output data for the
module. With the arrival of such frame the output data are taken over and
processed by the module. The module places its input data into the
EtherCAT frame, so that the master can receive it.
4.13.3.1.2 DC-synchronous
If the module is adjusted to DC-synchronous mode, it produces interrupts
according to the rules of the Distributed Clocks DC. The EtherCAT master
sends also here EtherCAT Frames away with the output data for the module.
With the arrival of such frames the output data of the module are taken over
however then processed only if a DC interrupt has occurred. With the DC
interrupt the module places its input data into a buffer, from which they are
transported with the next EtherCAT Frame to the master.
