Rockwell Automation 1746-NI16V SLC 500 Analog Input Modules User Manual - Manual (Page 53)

Publication 1746-UM001A-US-P
Channel Configuration, Data, and Status 5-5
The filter frequency affects the noise rejection characteristics. A lower
filter frequency increases noise rejection, and a higher filter frequency
decreases noise rejection. Select a filter frequency considering
acceptable noise and step response time. See “Channel Filter
Frequency Selection” on page 4-9 for more information on filter
frequency.
Select Calibration Mode (Bits 11 through 9)
To enter the calibration routine, set bit 9 to 1. You must perform the
low calibration first and then the high calibration to successfully
calibrate the module.
Low Calibration
Short channel input to analog common terminal. Then, set bit 10 of
the channel to be calibrated to 1. Clear bit 10 when completed.
High Calibration
Apply +10.25V dc ± 200 µV or +21 mA ± 200 nA between channel
input and analog common. Then, set bit 11 of the channel to be
calibrated to 1. Clear bits 11 and 9 when completed.
A/D
Groups Channels in
A/D Group How to select Filter Frequencies for the different A/D
Groups
Group 1 Channel 0
Channel 1
Channel 2
Channel 3
Filter selection for all the channels in group 1 is done in the
configuration word for channel 0. Even if channel 0 is disabled, the
filter setting needs to be selected in channel 0 for the rest of the
channels in group 1. Setting the filter in channels 1-3 will not
select a filter, rather the default filter is selected.
Group 2 Channel 4
Channel 5
Channel 6
Channel 7
Filter selection for all the channels in group 2 is done in the
configuration word for channel 4. Even if channel 4 is disabled, the
filter setting needs to be selected in channel 4 for the rest of the
channels in group 2. Setting the filter in channels 5-7 will not
select a filter, rather the default filter is selected.
Group 3 Channel 8
Channel 9
Channel 10
Channel 11
Filter selection for all the channels in Group 3 is done in the
configuration word for channel 8. Even if channel 8 is disabled, the
filter setting needs to be selected in channel 8 for the rest of the
channels in group 3. Setting the filter in channels 9-11 will not
select a filter, rather the default filter is selected.
Group 4 Channel 12
Channel 13
Channel 14
Channel 15
Filter selection for all the channels in Group 4 is done in the
configuration word for channel 12. Even if channel 12 is disabled,
the filter setting needs to be selected in channel 12 for the rest of
the channels in group 4. Setting the filter in channels 13-15 will
not select a filter, rather the default filter is selected.