APPEND IX
WIRELES SHART NETWOR K STATIS TICS DATA AVAIL AB LE FOR M ODBU S MA PPING
3BNP1029 12 C
59
Table 17: WirelessHART devices data available for Modbus mapping
Parameter
Register
Length
Data Type
Description
Loop Current
2
Floating Point
Loop current of a device in the network.
PV
2
Floating Point
Primary variable
SV
2
Floating Point
Secondary variable
TV
2
Floating Point
Tertiary variable
QV
2
Floating Point
Quarterly variable
PVStale
1
Unsigned 8-bit In-
teger
This variable is set to ‘1’, meaning NEW, if the last rec-
orded PV value was received within 3 times the burst
period of command 3 set in that device. If the PV
value is outdated then the value is set to ‘0’, meaning
OLD data.
SVStale
1
Unsigned 8-bit In-
teger
This variable is set to ‘1’, meaning NEW, if the last rec-
orded SV value was received within 3 times the burst
period of command 3 set in that device. If the SV
value is outdated then the value is set to ‘0’, meaning
OLD data.
TVStale
1
Unsigned 8-bit In-
teger
This variable is set to ‘1’, meaning NEW, if the last rec-
orded TV value was received within 3 times the burst
period of command 3 set in that device. If the TV
value is outdated then the value is set to ‘0’, meaning
OLD data.
QVStale
1
Unsigned 8-bit In-
teger
This variable is set to ‘1’, meaning NEW, if the last rec-
orded QV value was received within 3 times the burst
period of command 3 set in that device. If the QV
value is outdated then the value is set to ‘0’, meaning
OLD data.
Device Status
1
Unsigned 8-bit In-
teger
As specified in HART specification.
Battery Life
2
Floating Point
Remaining days for battery powered devices.
For line powered devices it is set to 65535.000 (deci-
mal format).
Extended De-
vice Status
1
Unsigned 8-bit In-
teger
Taken from Command 48 and is defined in HART
specifications’ Common Table 17.
Communica-
tion Status
1
Unsigned 8-bit In-
teger
Reported as 1 (device connected) &
0 (not connected)
Number of
WirelessHART
Neighbors
1
Unsigned 8-bit In-
teger
Number of neighbors of a device
10.2
WirelessHART Network Statistics Data Available for
Modbus Mapping
The following data (
) is available from WirelessHART gateway itself related to the
overall network statistics. This data is available for communication over ModbusTCP link.
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