Allen-Bradley CompactLogix 5370 L1 User Manual

Rockwell Automation Publication 1769-UM021G-EN-P - October 2015 205
Use I/O Modules with CompactLogix 5370 L2 Controllers Chapter 8
Where: Analog Read (Input) Data Value Channel x is the data read from the field device that is connected to the channel.
Timestamp Value is the timestamp of when data was received at the corresponding channel.
Cold Junction Compensation value is the converted CJC data. The data is calculated in the following manner:
• If the CJC is open, the converted value is 25 °C (77 °F).
• If the CJC is not opened and the Update CJC sensor every other scan option is disabled, the converted value is 25 °C (77 °F).
• If the CJC is not opened and the Update CJC sensor every other scan option is enabled, the converted value is the measured temperature.
SSign bit
Nu Bit not used
SIx General status bit for an input channel. Bits 0
…3 are for input channels. Bit 4 is for CJC. If the bit is 0, the channel is operating normally. If the bit is 1, a fault has occurred
on the channel.
OIx Overrange alarm bit for an input channel.
0 = Channel is operating normally
1 = Input signal is over normal range.
UIx Underrange alarm bit for an input channel.
0 = Channel is operating normally
1 = For bits 0
…3, that is, input channels, the input signal is under the normal range. For bit 4, that is, channel using the thermocouple/mV, RTD/Resistance input type, the
input value equals the minimum value of the range.
HIx High alarm bit for an input channel 0.
0 = Channel is operating normally
1 = Input signal is above the user-defined range
LIx Low alarm bit for an input channel 0.
0 = Channel is operating normally
1 = Input signal is below the user-defined range.
OCx Open circuit detection bit.
0 = Channel is not experiencing an open circuit condition
1 = Channel is experiencing an open circuit condition
SOx General status bit for output channel 0 or 1.
0 = Channel operating normally
1 = A fault has occurred on the channel
OOx Overrange alarm bit for output channel 0 or 1.
0 = Channel is operating normally
1 = Output signal is over the normal range
UOx Underrange alarm bit for output channel 0 or 1.
0 = Channel is operating normally
1 = Output signal is below the normal range
Table 16 - CompactLogix 5370 L2 Controller Embedded Analog I/O Module Input Data Array
Word
Bit
1514131211109876543210

Allen-Bradley CompactLogix 5370 L1 Specifications

General

Brand	Allen-Bradley
Model	CompactLogix 5370 L1
Category	Controller
Language	English