Figure 33: Rtu Report Device Type Message Format - Emerson PACSystems RX3i User Manual

PACSystems™ RX3i and RSTi-EP CPU Reference Manual
GFK-2222AK
6.3.3.10.6 Response:
The descriptions of the fields in the response are covered in the query description.
6.3.3.11 Message (17): Report Device Type
6.3.3.11.1 Format:

Figure 33: RTU Report Device Type Message Format

6.3.3.11.2 Query:
The Report Device Type query is sent by the master to a slave in order to learn what type
of programmable control or other computer it is.
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6.3.3.11.3 Response:
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Serial I/O, SNP & RTU Protocols
An Address of zero is not allowed as this cannot be a broadcast request.
The Function code is 17.
The Byte Count field is one byte in length and is equal to 5.
The Device Type field is one byte in length and is equal to 43 (hexadecimal) for
PACSystems
The Slave Run Light field is one byte in length. The Slave Run Light byte is equal to
OFFH if the CPU is in RUN Mode. It is equal to 0 if the CPU is not in RUN Mode.
The Data field contains three bytes. For PACSystems CPUs, the first byte is the Minor
Type, and the remaining bytes are zeroes. The following table lists minor types.
Section 6
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