Hart Communicator Model 375, 475 Or Mc Toolkit Fdc For Hart 7 Models - Honeywell STT700 STT700 User Manual

5.2.2. HART Communicator Model 375, 475 or MC Toolkit FDC for
HART 7 Models
Connect the HART communicator by attaching the leads in parallel with the input (24V) terminals of
the device. HART communication consists of a high frequency carrier superimposed onto the 4-20
mA signal. The HART transmitter transmits by modulating the 4-20 mA DC loop current with a 1
mA peak to peak (p-p) AC current signal.

Read/write ID

Select Dual Mode TC/TC, RTD/RTD

Select sensor type

Select PV/SV units

Select damping time

Set LRV and URV

Read URL and LRL

Read analog output

Read Sensor1 and Sensor2

Read % Output

Read Process Value (PV)

Read Cold Junction (CJ) Value

Read fail-safe direction

Set 0% and 100% output calibration

Force output current

Enable/disable latching

XS Delta detection ON/OFF

Set Delta Alarm

Read Delta

Match PVs

Read device status

Set/clear write protect

Select Loop Control Mode – Average, Difference, Sensor1, Sensor2, Redundant and Split-
Range

Lock/Unlock device

Read/Write Long tag

Read/write message, descriptor, date

Read/Write polling address

Read/Write loop current mode
Revision 1
Supported Commands
STT700 Temperature Transmitter User's Manual
Page 27