Beckhoff EL37x2 XFC oversampling analog input
The EL37x2 family of input slaves are oversampling slaves capable of
sampling an analog input faster than the model's sample time.
Supported slaves are:
- EL3702: +-10V voltage input
- EL3742: 0..20mA current input
The channels are presented as a vector for further processing.
Apart from the common slave options, the
following options configure the slave:
1 Ch. only
Only use first input channel (reduces EtherCAT frame size)
Oversampling configuration
Oversampling is configured by the ratio of CycleTimeSync1 to
CycleTimeSync0, where CycleTimeSync1 is an integer multiple (=
oversampling factor) of CycleTimeSync0. Moreover, CycleTimeSync1 is
the block's sample time.
This is automatically taken care of when choosing one of the
predefined oversampling modes. By choosing Custom, the values
can be set by the user, taking meticulous care not to choose any
incorrect modes.
Specifically, the overampling factor is set by the (negative) value of
CycleTimeSync0:Factor, while keeping CycleTimeSync0,
CycleTimeSync1 and ShiftTimeSync1 at zero and
CycleTimeSync1:Factor at -1.
The user should only try his luck on ShiftTimeSync0 and
ShiftTimeSync0:Factor