Endura APA592
pH / Redox (ORP) transmitter
9 HART Communication
86
OI/APA592–EN Rev. E
9.3 HART Universal Commands
Command
No.
Description
Details
0
Read Transmitter Unique
Identifier
Expanded device type code.
Manufacturer identification code.
Manufacturer device type code.
Number of preambles.
Revision level of HART Universal Command set implemented.
Revision level of device-specific command set implemented.
Transmitter software revision level.
Transmitter hardware revision level.
Device identification number.
1
Read Primary Variable
pH, ORP, pION or Ion Concentration process value with units.
2
Read Current and % of
Range
PV (pH, ORP, pION or Ion Conc) and PV percentage of range.
3
Read Dynamic Variables
and Current
Current output value (mA).
PV value (pH, ORP, pION or Ion Conc) and
PV unit (pH, mV, ppb, ppm, %, ug/l, mg/l).
Temperature value and unit (°C or °F).
Reference Impedance value and unit (Kohm).
Sensor input value and unit (mV).
6
Write Polling Address
When set to 0, Current Output is active and provides an analog
output proportional to the Primary Value.
HART operates in point-to-point mode. When set between 1 to
15, Current Output is fixed at 4 mA and HART operates in
multi-drop mode.
11
Read unique Identifier
Associated with Tag
Returns the expanded device type code, revision levels and
identification number of the device that contains the HART
identification tag sent with this command.
Table 9.1 HART Universal Commands
