Emerson Rosemount 1066 - Measurements Available via HART; Diagnostics Available via HART

96 HART Communications
Section 10: HART Communication Instruction Manual
April 2017 LIQ-MAN-1066
Measurements Available via HART
A number of live measurements are made available by HART in addition to the main
measurements such as pH or Conductivity. All of these measurements are called Device Variables,
which can be mapped to the Dynamic Variables PV, SV, TV, and QV for regular reading by the
typical HART host.
Each 1066 transmitter type, 1066P, 1066C, etc. will have its own set of Device Variables, based on
the secondary measurements used in making the main measurement.
Appendix 10.1 shows the
Device Variable for the each transmitter type, and the Dynamic Variables, which they can be
mapped to.
Diagnostics Available via HART
Status Information – Device Status Bits
Bit 0 Primary Variable out of Limits:
This bit is set when PV is out of its limits.
Bit 1 Non-primary Variable out of Limits:
This bit is set when any active device variable other than the Primary variable is out of its
limits.
Bit 2 Loop Current Saturated:
This bit is set when Analog Output 1 is not fixed, and it is less than 3.8 mA or greater than
22.0 mA.
Bit 3 Loop Current Fixed:
This bit is set when Analog Output 1 is being simulated, calibrated, or when a device
failure is detected and the Analog Output 1 is configured to output a fixed value.
Bit 4 More Status Available:
The “more status available” bit will be set when the device status condition occurs (i.e. bit
goes from 0 to 1) on at least one of the Additional Transmitter Status bits are set.
Bit 5 Cold Start:
This bit is set when a Master Reset is performed either by Command 42, or a power cycle.
2 bits are maintained internally, for primary and secondary masters.
Bit 6 Configuration Changed:
This bit is set when a configuration or calibration parameter is changed either through a
write command or a local interface command. 2 bits are maintained internally, for
primary and secondary masters.
Bit 7 Field Device Malfunction:
This bit is set when a fault condition is detected in the device electronics or sensor.
10.4
10.4.1
10.3