Rockwell Automation 1771-N SERIES High Resolution Analog Module User Manual User Manual
Page 57
4–17
Configuring the Module
Publication 1771ĆUM127B-EN-P - December 2002
Bit/Word Description of Output Configuration Words 3 and 4
Word
Decimal Bit
(Octal Bit)
Definition
Word 3
Bit 00
Verify. If this bit is set to 1, the module will compare its current
programming with the programming downloaded in the BTW. If
they are the same, it will verify good; if they are different, the
module will verify bad. In no case will any programming data in
the BTW be applied to the module.
Bit 01
Temperature scale. 0 = Celsius, 1 = Fahrenheit
Bit 02
BCD select.
1 = all values in BCD format.
0 = all values in 2's complement binary
Bits 03Ć14
(03Ć16)
Not used. Always 0
Bit 15 (17)
CJ alarm enable. A value of 1 enables over and underrange
indication for the cold junction channel. If the module does not
have a cold junction channel, this bit is 0.
Word 4
Bits 00Ć15
(00Ć17)
Real time sample. Sample time in milliseconds. 0 = off.
RTS minimum is 100msec (counts = 100). Maximum 10
seconds in binary; 9.999 seconds in BCD.
Output Programming
The next group of six words contain channel-specific parameters.
This includes low and high scale values, low and high clamp values,
ramp rate, reset state, alarm enable and reset value.
Output Configuration Words 5 through 10
Word/Dec. Bit
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Word/Octal Bit
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
Channel 1 Programming
5
Low Scale Value
6
High Scale Value
7
Low Clamp Value
8
High Clamp Value
9
Alarm
enable
Reset State
0
Maximum Ramp Rate, % of Full Scale per second
10
Reset Value