An input ramp limit can only be set in connection with a filter. In this case, the input ramp limit is set before the filter.
The difference of the input value deviation is checked for exceeding the specified limit.
If so, the updated input value equals the old value ± the limit value.
The input ram limit serves to suppress disturbing pulses (spikes).
Possible limit values: see bits 4–6 in the following table.
Depending on the filter stage, the input value is valuated more or less highly.
Formula for the evaluation of the input value: valuenew = valueold - (valueold/filter stage) + (input value/filter stage)
Possible filter stages: see bits 0–2 in the following table.
|
Bit |
Description |
|---|---|
|
0–2 |
The following bits are used to define the filter stage. 000 = Filter disabled 001 = Filter stage 2 010 = Filter stage 4 011 = Filter stage 8 100 = Filter stage 16 101 = Filter stage 32 110 = Filter stage 64 111 = Filter stage 128 |
|
3 |
0 |
|
4–6 |
The following bits are used to define the input ramp limit. 000 = No limitation 001 = Limit value 0x3fff 010 = Limit value 0x1fff 011 = Limit value 0x0fff 100 = Limit value 0x07ff 101 = Limit value 0x03ff 110 = Limit value 0x01ff 111 = Limit value 0x00ff |
|
7 |
0 |