Scaling ranges – Rockwell Automation 1771-IL/B , D17716.5.91 ISOLATED ANALOG INPUT Module User Manual
Page 32
Module Configuration
Chapter 4
4-8
Scaling Ranges
The maximum range of the scaling values is +9999 BCD or +32767 binary.
These values must be entered in the format selected in word 2, bit 08 (10).
If invalid values are entered into the scaling words, the corresponding
input in the BTR data will be zero and the invalid scaling bit will be set.
Table 4.F
Default Scaling Values
Input Range
Default Scaling Value
-10 to +10V
4 95
4 95
-5 to +5V
-4095 to +4095
0 to 5V
4 95
1 to 5V
0 to +4095
If scaling and alarms are not selected, the module still requires specific
BTR and BTW file lengths for the number of channels used. Table 4.G
shows the required BTR and BTW file lengths.
Table 4.G
Block Transfer Read and Write File Lengths (with no scaling or alarms)
Channels Used
BTR File Length
BTW File Length
1
5
5
2
6
7
3
7
9
4
8
11
5
9
13
6
10
15
7
11
17
8
12
19
Important: Use decimally addressed bit locations for PLC-5 processors.