Rockwell Automation 1771-IL/B , D17716.5.91 ISOLATED ANALOG INPUT Module - Manual (Page 44)

Module Calibration
Chapter 6
6-4
Gain Calibration
Calibrating gain requires that you apply +10.00000V across each input channel.
To calibrate the gain of an input, proceed as follows:
NOTE: Normally, all channels are calibrated simultaneously (decimal bits
08015, octal bits 10-17 of word 37 are 0). To disable calibration on any channel,
set (1) the corresponding bit 08-15 decimal (10-17 octal) of word 37.
1. Apply +10.00000V across each input channel as shown in Figure 6.2.
Figure 6.2
Applying 10.00000V for Gain Calibration
10.00000V
Apply
+
-
10531-I
Terminal Identification
Wiring Arm
Cat. No. 1771-WF
18
17
16
1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Not used
2. After the connections stabilize, request the gain calibration by setting bit
01 in BTW word 37 and sending a block transfer write (BTW) to the
module. Refer to Table 6.A.
When the BTW is sent, all channels are calibrated to +10.00000V.
3. Queue BTRs to monitor for gain calibration complete and any channels
which may not have calibrated successfully.