Publication 1766-RM001A-EN-P - October 2008
26
I/O Configuration
1762-IT4 Thermocouple Module Input Data File
For each module, slot x, words 0…3 contain the analog values of the
inputs. The input data file is shown below.
The bits are defined as follows:
•
Sx = General status bits for channels 0…3 (S0…S3) and the CJC
sensor (S4). This bit is set (1) when an error (over-range,
under-range, open-circuit, or input data not valid) exists for that
channel. An input data not valid condition is determined by the user
program. Refer to MicroLogix 1200 I/O Thermocouple/mV Input
Module User Manual, publication
for additional details.
•
OCx = Open-circuit indication for channels 0…3 (OC0…OC3) and
the CJC sensor (OC4).
•
Ox = Over-range flag bits for channels 0…3 (O0…O3) and the CJC
sensor (O4). These bits can be used in the control program for error
detection.
•
Ux = Under-range flag bits for channels 0…3 (U0…U3) and the CJC
sensor (U4). These bits can be used in the control program for error
detection.
Table: 0.B
Wor
d/Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
0
SGN
Analog Input Data Channel 0
1
SGN
Analog Input Data Channel 1
2
SGN
Analog Input Data Channel 2
3
SGN
Analog Input Data Channel 3
4
Reserved
OC
4
OC
3
OC
2
OC
1
OC
0
Reserved
S4
S3
S2
S1
S0
5
U0
O0
U1
O1
U2
O2
U3
O3
U4
O4
Reserved
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