Spectrum Controls 1769sc-HART Modules - Manual (Page 66)

Compact IO™ Isolated HART Analog Input Module
User's Manual 0300215-03 Rev. A
6-16
between packets.
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To override the delay, the packet just scanned word needs to be
populated with word seven from the input data file on each scan of the ladder program.
Input word seven contains the channel and packet number just scanned.
Note: Input word seven is the first word of twenty which contains the multiplexed
HART data for each channel.
6.5.5 Message Master Control (Word 2)
This word is used to control the data flow of a message sent to the module. These
messages include module commands such as HART pass-through, HART suspend and
resume, and get device information.
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6.5.6 Message Request Size (Word 3)
The message request size determines the size of the message, in bytes, that will be sent to
the module.
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6.5.7 Message Request Buffer (Words 4…23)
The message request buffer contains the data making up the message that will be sent to
the module.
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6.5.8 Reserved (Words 24…45)
Reserved for future expansion.
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Refer to Chapter 7 for more details.