Emerson 1410 - Page 41

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Reference Manual
00809-0200-4410, Rev BC
Host Integration
July 2017
Host Integration
Point Name is entered as <HART Tag.PARAMETER>. Point Name can be entered using the list of values (…)
or manually entered. The following table gives a list of standard device parameters which may be
considered for Modbus register mapping.
PV, SV, TV, and QV (dynamic variables) will vary by device type. Refer to the device’s documentation for
more information on what value is represented by each dynamic variable.
RELIABILITY and ONLINE relate to wireless communications. RELIABILITY is the percentage of messages
received from the wireless field device. ONLINE is a true/false indication of whether the device is
communicating on the wireless network.
**_HEALTHY parameters are a true/false indication of the health of a particular variable
(** = dynamic variable – PV, SV, etc…). These parameters incorporate critical diagnostics from the
wireless field device as well as communication status.
Note
The **_HEALTHY parameters are a great indication of the health and communications status of the data
values.
State (state value): The value of a data point which drives a Modbus output of 1. For example, if a data
point is reported as either True or False, a state value of True will report a 1 for True and 0 for False. A state
of False will report a 0 for True and a 1 for False. State is only required for register numbers 0–19999
(Boolean, bit, coil, binary, etc…).
Invert: This check box will invert the Modbus output from a 1 to a 0 or a 0 to a 1. Invert is only used for
Boolean values using register numbers 0–19999.
Gain: This value is multiplied to the data value for the purpose of scaling integers. Gain is only required if
scaled is chosen on the Modbus communications page and globe gain and offset is not chosen.
Offset: This value is added to the data value for the purpose of scaling integers. Offset is only required if
scaled is chosen on the Modbus communications page and globe gain and offset is not chosen.
Table 5-1. Device parameters available
Parameter Description Data type
PV Primary Variable 32-bit float
SV Secondary Variable 32-bit float
TV Tertiary Variable 32-bit float
QV Quaternary Variable 32-bit float
RELIABILITY A measure of connectivity to the Gateway 32-bit float
ONLINE Wireless communications status Boolean
PV_HEALTHY Health status for PV Boolean
SV_HEALTHY Health status for SV Boolean
TV_HEALTHY Health status for TV Boolean
QV_HEALTHY Health status for QV Boolean