WirelessHART WHA-GW-F2D2-0-A-Z2-ETH, Руководство пользователя

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Appendix
12 Appendix
12.1 HART Status Information
HART Device Status
The HART device status or field device status indicates the current operating status of the field
device.
HART Extended Device Status
Command 48
Command 48 returns additional status information that is not included in the HART device
status response code.
Code Parameter Description
0x01 Primary Variable
Out Of Limits
The PV is beyond its operating limits.
0x02 Non-Primary
Variable Out Of
Limits
A device variable not mapped on the PV is beyond its operating
limits.
0x04 Loop Current
Saturated
The loop current has reached its upper (or lower) endpoint limit
and cannot increase (or decrease) any further.
0x08 Loop Current
Fixed
The loop current is being held at a fixed value and is not
responding to process variations.
0x10 More Status
Available
More status information is available via command 48.
0x20 Cold Start A power failure or device reset has occurred.
0x40 Configuration
Changed
An operation was performed that changed the configuration of
the device.
0x80 Device
Malfunction
The device detected a serious error or failure that compromises
device operation.
Code Parameter Description
0x01 Maintenance
Required
This bit is set to indicate that, while the device has not
malfunctioned, the field device requires maintenance.
0x02 Device Variable
Alert
This bit is set if any device variable is in an alarm or warning state.
The host should identify the device variable(s) causing this to be
set using the device variable status indicators.
0x04 Critical Power
Failure
For battery powered devices. This bit is set when the power is
becoming critically low. Devices must be able to sustain their
network connection for at least 15 minutes from when this bit is
set.
0x08 Failure When this bit is set, one or more device variables (for example,
measurement or control values) are invalid due to a malfunction
of the field device or its peripherals.
0x10 Out Of
Specification
When set, this bit indicates deviations from the permissible
ambient or process conditions have been detected that may
compromise measurement or control accuracy (for example,
device performance may be degraded given current operating
conditions).
0x20 Function Check This bit is set if one or more device variables are temporarily
invalid (for example, frozen) due to ongoing work on the device.