Make oversampling setting

1. The terminal supports oversampling factors from 8-fold to 10,000-fold for both inputs and both outputs.
Conditions: The oversampling factor must be the same for both channels and for input and output.

Fig.190: DC/oversampling setting

Note: the oversampling factor must be selected at the EtherCAT cycle time so that the divisor in [1 ns] remains an integer.

2. Examples:

• Cycle 100 µs, OVS = 32 → 3.125 µs = OK
• Cycle 666.6 µs, OVS = 32→ 20.0909... µs = NOK
  
  TwinCAT usually does not display non-executable constellations (here: OVS = 32) at all:

Fig.191: Suitable representation Oversampling factor

3. For linking with the PLC a byte array is suitable. For example, a byte array of size 1250 for OVS = 10,000:

The linking in TwinCAT 3 can take place, for example, under the selection of "Matching Size":

Fig.192: Linking by "Matching Size" variable type

It should be noted that the byte sequence corresponds to the ascending array index in terms of time and the bits of a byte are output from right to left, i.e. from the least significant (.0) to the most significant (.7) bit: the byte 2#10100001 would therefore be visible on the oscilloscope (1 V/digit, 1 µs/digit, time axis from left to right) as 10000101 (blue line):

Fig.193: Oscilloscope display