Rockwell Automation 1771-N SERIES High Resolution Analog Module User Manual User Manual
Page 135
Block Transfer Write and Block Transfer Read Configurations for 3 Output/5 Input 1771-N Series Modules
G–3
Publication 1771ĆUM127B-EN-P - December 2002
00
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
Word/Dec. Bit
00
01
02
03
04
05
06
07
10
11
12
13
14
15
16
17
Word/Octal Bit
49
Alarm
enable
Rate Alarm: Scaled Units per second
50
Filter Time Constant: 0.1 second units
Alarm Deadband
51
Thermocouple Type
0
RTD Type
10 Ohm Offset: 0.01 Ohm units
Channel 8 Programming
52
Low Scale Value
53
High Scale Value
54
Low Alarm Value
55
High Alarm Value
56
Alarm
enable
Rate Alarm: Scaled Units per second
57
Filter Time Constant: 0.1 second units
Alarm Deadband
58
Thermocouple Type
0
RTD Type
10 Ohm Offset: 0.01 Ohm units
Block Transfer Write Bit/Word Descriptions for 3 Output/5 Input
Modules
Word
Decimal Bit
(Octal Bit)
Definition
00-03
Constant = 0
Bits 04-07
Number of outputs = 0011 binary
Word 0
Bits 08-13
(10-15)
Constant = 00 1000 binary
Bits 14-15
(16-17)
Block transfer write type = 10 binary
Word 1
Bits 00-15
(00-17)
First Output channel data
Word 2
Bits 00-15
(00-17)
Second Output channel data
Word 3
Bits 00-15
(00-17)
Third Output channel data
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
Word 4
Bit 02
BCD select.
1 = all values in BCD format.
0 = all values in 2's complement binary
Bits 03-14
(03-16)
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.