Chapter 5. Communication
86 AT600 User’s Manual
5.2 HART
5.2.1 Device Identification
The AT600 flowmeter supports the HART communication, for which the manufacturer ID is 0x9D (157 Dec) and the
Device type Code is 0x7F (127 Dec).
5.2.2 Commands
5.2.2a Universal Commands
2304 8964 RO
dynamic threshold on UP
channel RO INT32
2306 8966 RO
dynamic threshold on
DOWN channel RO INT32
Table 6: Universal Commands for HART
Command Function Description
0 Read Unique Identifier Returns identity information about the meter including: the Device
Type, revision levels, and Device ID.
1 Read Primary Variable Returns the Primary Variable value along with its Unit Code
2 Read Loop Current And
Percent Of Range
Reads the Loop Current and its associated Percent of Range.
3 Read Dynamic Variables
and Loop Current
Reads the Loop Current and up to four predefined Dynamic Variables.
The Dynamic Variables and associated units are defined via
Commands 51 and 53.
6 Write Polling Address Writes the polling address and the loop current mode to the field
device.
7 Read Loop Configuration Read polling address and the loop current mode.
8 Read Dynamic Variable
Classification
Reads the Classification associated with the Dynamic variable.
9 Read Device Variables
with Status
Request the value and status of up to eight device Device or Dynamic
Variables.
11 Read Unique Identifier
Associated With Tag
If the specified tag matches that of the meter, it responds with the
Command 0 response.
12 Read Message Reads the Message contained within the meter.
13 Read Tag, Descriptor, Date Reads the Tag, Descriptor, and Date contained within the meter.
14 Read Primary Variable
Transducer Information
Reads the Transducer (meter) Serial Number, Limits/Minimum Span
Units Code, Upper Transducer Limit, Lower Transducer Limit, and
Minimum Span for the Primary Variable transducer.
Table 5: MODBUS Map (cont.)
Register
(in Hex)
Register (in
Decimal) Access Level Description RO/RW Format
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