ABB AWIN GW120, User Manual

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WIRELESS HART FIELD DEVICE DATA AVAIL ABLE FO R M ODBU S M APPING APPENDIX
64 4JNO0 0030 8 A
Appendix A. Appendix
Appendix A.1 WirelessHART Field Device Data Available for
Modbus Mapping
The following data (see, Table 17 ) is available from WirelessHART devices in the gateway. This
data is available for communication over ModbusTCP link.
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
Integer
This variable is set to ‘1’, meaning NEW, if the
last recorded 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 If the PV value is outdated then the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
Integer
This variable is set to ‘1’, meaning NEW, if the
last recorded 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 If the SV value is outdated then the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
Integer
This variable is set to ‘1’, meaning NEW, if the
last recorded 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 If the TV value is outdated then the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
Integer
This variable is set to ‘1’, meaning NEW, if the
last recorded 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 If the QV value is outdated then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
Integer
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
(decimal format).
Extended Device
Status
1
Unsigned 8-bit
Integer
Taken from Command 48 and is defined in
HART specifications’ Common Table 17.
Communication
Status
1
Unsigned 8-bit
Integer
Reported as 1 (device connected) &
0 (not connected)
Space in holding registers is reserved for device variable codes but are currently
not supported.