Configuring the module – Rockwell Automation 1791-XXXX ANALOG BLOCK I/O User Manual
Page 43
Chapter 4
Analog Block Applications Using
Block Transfers
4-3
You must configure your block module by performing a block transfer
write (BTW) instruction from the programmable controller to the module.
Each input can be independently configured in one BTW.
Maximum length of the BTW is 27 words (0 thru 26). When configuring
the module, first send the complete BTW. You can shorten the BTW to 3
words for subsequent write operations if parameters for each channel
remain the same.
Block transfer write data is shown in Figure 4.2.
Figure 4.2
Block Transfer Write for Analog Block I/O
Decimal
15
14
13
12
11
10
09
08
07
06
05
04
03
02
01
00
Octal
17
16
15
14
13
12
11
10
07
06
05
04
03
02
01
00
0
Module Mode
Scaling
Range
Alarm Enable
Filter
1
Output Channel 0 Data
2
Output Channel 1 Data
3
Output Channel 0 Minimum Scaling
4
Output Channel 0 Maximum Scaling
5
Output Channel 1 Minimum Scaling
6
Output Channel 1 Maximum Scaling
7
Input Channel 0 Minimum Scaling
8
Input Channel 0 Maximum Scaling
9
Input Channel 1 Minimum Scaling
10
Input Channel 1 Maximum Scaling
11
Input Channel 2 Minimum Scaling
12
Input Channel 2 Maximum Scaling
13
Input Channel 3 Minimum Scaling
14
Input Channel 3 Maximum Scaling
15
Input Channel 0 Low Alarm Level
16
Input Channel 0 High Alarm Level
17
Input Channel 0 Alarm Deadband
18
Input Channel 1 Low Alarm Level
19
Input Channel 1 High Alarm Level
20
Input Channel 1 Alarm Deadband
21
Input Channel 2 Low Alarm Level
22
Input Channel 2 High Alarm Level
23
Input Channel 2 Alarm Deadband
24
Input Channel 3 Low Alarm Level
25
Input Channel 3 High Alarm Level
26
Input Channel 3 Alarm Deadband
Configuring the Module and
Setting Outputs with Block
Transfer Write Instructions