Scaime eNod4-B - Filters; 12.1 Principles; 12.3 Settings Description

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User manual SCAIME: NU-soft-eNod4B-E-0716_236704-C.doc
12 FILTERS
Name
Modbus address
CANopen
index/sub-index
Profibus Cyclic IN/OUT
Acyclic
DPV1
slot/index
Type
Access
A/D conversion rate
0x0036
0x4000 / 0x00
R : 0x0240
W: 0x0241
0x04 / 0x00
Uint
RW
filters activation
0x0037 LSB
0x4001 / 0x01
(byte)
R : 0x0242
W: 0x0243
0x04 / 0x01
Byte
RW
Low-pass order
0x0037 MSB
0x4001 / 0x02
(byte)
Byte
Low-pass cut-off frequency
0x0038
0x4001 / 0x03
R : 0x0244
W: 0x0245
0x04 / 0x02
Uint
RW
Band-stop high cut-off frequency
0x0039
0x4001 / 0x04
R : 0x0246
W: 0x0247
0x04 / 0x03
Uint
RW
Band-stop low cut-off frequency
0x003A
0x4001 / 0x05
R : 0x0248
W: 0x0249
0x04 / 0x04
Uint
RW
Average weight filter depth
0x0058
0x4001 / 0x06
R : 0x0274
W: 0x0275
0x07 / 0x00
Uint
RW
Average process data filter depth
0x0059
0x4703 / 0x09
R : 0x0278
W: 0x0279
0x07 / 0x02
Uint
RW
12.1 Principles
eNod4 contains 4 filtering layers that are user-configurable :
• filtering related to the A/D conversion rate (with rejection of the mains frequency)
• a low-pass Bessel-type filter
• a band-stop filter
• a Moving average weight filter
Except for the A/D conversion rate that is always enabled, none of these filters is mandatory. However, to perform
accurate measurements we recommend setting a combination of filters. eNodView software may be helpful in
designing the best filter configuration for the application.
12.2 Settings list
Here is the list of the settings that have an impact on the filters configuration:
12.3 Settings description
12.3.1 A/D conversion rate
It contains a code which represents the A/D conversion rate and the rejection. See table below: