Spectrum Controls 1771sc-IFE32 - Manual (Page 30)

20 PLC-5 TM 32-Channel Analog Input Module
Data Format: Data Format: Data Format: Data Format: Data Format:
You must indicate what format will be used to read data from your module. Typically,
you select BCD with PLC-2 processors, and 2’s complement binary with PLC-3 and
PLC-5 processors. You use BTW words 8-15, bits 0-15 to set the data format.
Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Group
8 Channel 4 Channel 3 Channel 2 Channel 1 Data Format
9 Channel 8 Channel 7 Channel 6 Channel 5 Data Format
10 Channel 12 Channel 11 Channel 10 Channel 9 Data Format
11 Channel 16 Channel 15 Channel 14 Channel 13 Data Format
12 Channel 20 Channel 19 Channel 18 Channel 17 Data Format
13 Channel 24 Channel 23 Channel 22 Channel 21 Data Format
14 Channel 28 Channel 27 Channel 26 Channel 25 Data Format
15 Channel 32 Channel 31 Channel 30 Channel 29 Data Format
Data Format: Comment: Data Format: Comment:
0* Signed 16 bit 3 Unsigned 12 bit
1 Unsigned 16 bit 4 Signed BCD
2 Signed 12 bit 5Unsigned BCD
6 through 15NA
*Within a group of 8 channels (1..8, 9..16, 17..24, or 25..32) all 8 channels must be one
of the valid voltage ranges or all 8 channels must be one of the valid current ranges.
Mixing of voltage and current sources within a group of 8 is not allowed. Also,
differential mode must be specified for two consecutive channels starting with an odd
channel (1&2, 3&4, 5&6, etc).
Input Type/Range must be configured using Binary or Hexidecimal values.
For example: Setting Word 0 to BBBB hex sets channels 1-4 to a +1 to +5V input
range.
Output is scaled to the range limits if no other scaling is applied as follows:
Digital Filtering: Digital Filtering: Digital Filtering: Digital Filtering: Digital Filtering:
The module has hardware-based high frequency filters on all channels to reduce the
effect of electrical noise on the input signal. Software digital filtering is meant to
reduce the effect of process noise on the input signal. Digital filtering is selected
using BTW words 16-19, bits 0-15.
Word/Bit 15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00 Group
16 Chan 8 Chan 7 Chan 6 Chan 5Chan 4 Chan 3 Chan 2 Chan 1 Filter Freq
17 Chan 16 Chan 15Chan 14 Chan 13 Chan 12 Chan 11 Chan 10 Chan 9 Filter Freq
18 Chan 24 Chan 23 Chan 22 Chan 21 Chan 20 Chan 19 Chan 18 Chan 17 Filter Freq
19 Chan 32 Chan 31 Chan 30 Chan 29 Chan 28 Chan 27 Chan 26 Chan 25Filter Freq
The onboard ADC data filters may be selected for the following filter frequencies:
Filter: -3dB
Frequency:
Output Rate: -64.5dB Frequency:
0* 13.65 Hz 350Hz 49Hz (50/60Hz rejection)
1 7.8 Hz 200 Hz 20Hz
2+ 209.6 Hz 800 Hz NA
3 1667 Hz 6400 Hz NA
*Default
+ Filtering is set for a 1msec response, which is 800Hz for the AD7731.