Yokogawa FieldMate - Manual (Page 304)

<I ISA100 device configuration>
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IM 01R01A01-01E 9th Edition : May 31, 2013-00
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Figure I-7-9 HART (HART adaptor) Device Maintenance Information
Format
HART (adaptor) – Tag name of the Route Device (network ID)
Tag name of the Route Device: Device Tag name of the Route Device (HART adaptor)
Network ID: ID of the network to which the relay device belongs