Mix 02
Kendrion Kuhnke Automation GmbH
298
17 May 2021
Reading are or are not added to the process image, depending on what the oversampling parameter is set
to. The default is 5.
This setting refreshes the entire set of analogue values in the process images after 5 ms (check how the
counter in the StateWord increments). The readings taken every 1 ms are entered in variables
AnalogInx_Sample0..4 (x=0..3).
Lower oversampling parameter settings refresh the process image more often and the unused sample
values are left blank.
Oversampling parameter = 1 refreshes the process image after 1 millisecond already.
Values will be entered in Sample0 only. Samples 1..4 are left blank.
Information
Refreshing of the EtherCAT master's analogue values:
Take account of the EtherCAT cycle to assess whether the EtherCAT master's values are up-to-
date. Ideal EtherCAT cycles for this module are 1 ms to 5 ms long.
Information
Consistent analogue values:
The module provide consistent sets of analogue values. Note that analysing the master's sample
values must also be consistent.
Information
Quality of analogue values:
Best results are obtained by connecting the shield of the signal cables to operative earth.
Low Voltage
Low CPU or load voltage turns off the outputs, sets bits 3 or 4 of Inputs, StateWord and makes LED IO of the
module flash (2x).
Use Outputs, ControlWord bit0 to reset the error when the voltage has returned to the admissible range (24V
-20%..+25%). This also re-enables the outputs.
Short Circuit
A thermal fuse at the output driver protects the outputs. When the current exceeds the admissible range, the
associated output turns off, bits 3 of Inputs, StateWord are set and LED IO of the module flashes (1x).
Use Outputs, ControlWord bit0 to reset the error after removing the short circuit.
