Spectrum Controls 1769sc-HART Modules - Manual (Page 54)

Compact IO™ Isolated HART Analog Input Module
User's Manual 0300215-03 Rev. A
6-4
6.3.8 Low Process Alarm Flag Bits L0 to L3 (Word 6)
The low process alarm flag is set when the measured analog signal falls below the low
process alarm setpoint. The low process alarm setpoint is defined in Section 6.4 Module
Configuration.
6.3.9 Pad (Word 7)
Word 7 is not used and will always be zero. This word is used to maintain 16 bit
alignment.
6.3.10 HART Data (Words 8 to 27)
This block of twenty words contains the multiplexed HART data for all four channels. 1
6.3.11 Message Slave Control (Word 28)
The message slave control word controls how data is returned from the module after
sending a message using output words 2 through 23
1 .
6.3.12 Message Reply Size (Word 29)
The message reply size indicates the number of bytes returned by the module after
sending a message using output words 2 through 23
1
.
6.3.13 Message Reply Buffer (Words 30…49)
After sending a message to the module, the response data for the message is stored in the
message reply buffer
1
.
6.3.14 Reserved (Words 50…71)
Reserved for future expansion.
1
For more details refer to Chapter 7