Hart Commands - Signet 9900 Operating Instructions Manual

Hart Commands

Universal Commands
All HART Rev. 7.2 Universal Commands are supported:
CMD
ID
0 Read Unique Identifi er
1 Read Primary Variable
2 Read Loop Current And Percent Of Range
3 Read Dynamic Variables And Loop Current
6 Write Polling Address
7 Read Loop Confi guration
8 Read Dynamic Variable Classifi cation
9 Read Device Variable With Status
11 Read Unique Identifi er Associated With Tag
12 Read Message
13 Read Tag, Descriptor, Date
14 Read Primary Variable Transducer Information
15 Read Device Information
16 Read Final Assembly Number
17 Write Message
18 Write Tag, Descriptor, Date
19 Write Final Assembly Number
20 Read Long Tag
21 Read Unique Identifi er Associated With Long Tag
22 Write Long Tag
38 Reset Confi guration Changed Flag
48 Read Additional Device Status
Command 9 – Read Device Variable with Status
Returns the value, status, variable code, variable classifi cation and unit code of up to four device variables.
Command 11 – Read Unique Identifi er Associated with Tag
Returns all identity information associated with the device, i.e., the device type, device revision level and Device ID.
Issued using the 'tag'.
Command 12 – Read Message
Read back the message stored in the device. See Command 17.
Command 13 – Read Tag, Descriptor, Date
Reads the tag, descriptor and date values contained within the device. See Command 18.
Command 14 – Read Primary Variable Transducer Information
Reads transmitter serial number, unit code, upper and lower limits and minimum span for primary variable.
Command 15 – Read Device Information
Returns the alarm selection code, transfer function code, upper and lower range values, write protect code and
unit code.
68 9900 Transmitter
Function
Command 0 – Read Unique Identifi er
Returns device type, device and software revision levels, device
status, and codes for the manufacturer and product information.
Command 1 – Read Primary Variable
Returns the numeric value of the Primary Variable
(the 4 to 20 mA current loop) and the unit code for that value
(e.g. '45.3' and 'Degrees Celsius').
Command 2 – Read Loop Current and Percent of Range
Returns the loop current value of the 4 to 20 mA current loop and
the percent of range (e.g. '12.0' and '50%').
Command 3 – Read Dynamic Variables and Loop Current
Returns the loop current value of the 4 to 20 mA current loop, as
well as the numeric value of the Secondary Variable (if present)
and the Secondary Value's unit code.
Command 6 – Write Polling Address
Enables (or disables) Multi-Drop mode. While in Multi-Drop
mode, loop current is held at a fi xed value and is no longer
available for signaling. Also sets the polling address of the
device for Multi-Drop mode.
Command 7 – Read Loop Confi guration
Reads the polling address of the device and the loop
confi guration (see Command 6).
Command 8 – Read Dynamic Variable Classifi cations
Returns the classifi cation code for the Primary Variable and
Secondary Variable (if present).