Rockwell Automation 1771-N SERIES High Resolution Analog Module User Manual User Manual
Page 158
Block Transfer Write and Block Transfer Read Configurations for 6 Output/2 Input 1771-N Series Modules
I–6
Publication 1771ĆUM127B-EN-P - December 2002
Definition
Decimal Bit
(Octal Bit)
Word
Bits 00-07
10 ohm offset. Compensates for a resistance offset on a 10
ohm copper RTD. Range of +0.99 ohms, in units of 0.01 ohms.
This field must be 0 for all other RTDs.
Bits 08-10
(10-12)
RTD type. Specifies type of RTD linearization on RTD
channels:
001 = 100 ohm Pt, European standard;
010 = 100 ohm Pt. US standard;
011 = 10 ohm copper;
100 = 120 ohm nickel.
This field is 0 for non-RTD channels.
Word 51
Bit 11 (13)
Constant = 0
Bits 12-15
(14-17)
Thermocouple type. Specifies type of TC linearization on TC
channels.
0000 = millivolts;
0001 = B;
0010 = E;
0011 = J;
0100 = K;
0101 = R;
0110 = S;
0111 = T.
This field must be 0 for non-thermocouple channels.
Words 52 thru 58
Same as words 45 thru 51 but for channel 8.
Block Transfer Read Word Assignments for 6 Output/2 Input
Modules
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
0
Constant = 8800 Hexadecimal
1
Power
up
Bad
Chan.
Data
Mod
Alarm
RTS
Time
out
I/O
Reset
Program
Verify
Mod
Fault
Bad
Prog
Bad
Struct
Unused = 0
2
1
Unused = 0
CJC
Over
Range
CJC
Under
Range
3
Cold Junction Temperature; Units of 0.01 degrees C or 0.1 degrees F
Channel 1 Status
4
0
Unused = 0
Bad
Calib
Bad
Prog
Bad
Data
Rate
Alarm
High
Clamp
Low
Clamp
Unused = 0
5
Channel 1 Raw Count sent to DAC
Channel 2 Status
6
0
Unused = 0
Bad
Calib
Bad
Prog
Bad
Data
Rate
Alarm
High
Clamp
Low
Clamp
Unused = 0
7
Channel 2 Raw Count sent to DAC