User Manual

Commissioning
Part No.: 4417.762_Rev07 SmartRadar FlexLine
Service Manual 6 - 123
6.9.2 Functional Description
HCI-HAO is a HART slave module, which uses standard HART
communication to communicate with HART-devices. This module
makes use of the Bell 202 Frequency Shift Keying (FSK) standard to
superimpose digital signals at a low level on the 4–20 mA analog signal.
ESF07-0015
FIGURE 6-33 The analog and digital signals within the HART
®
communication
The HCI-HAO works as an interface board between FlexConn boards
and a HART master, and it makes the data available on the HART bus.
The user needs to set the required linked variable details.
The linked primary variable is mapped between 4–20 mA on the analog
output depending on the range values set. The linked variables are
scanned every 1 second and so is the analog output refresh rate.
The HCI-HAO is configurable by:
 a HART communicator
 a local SmartView
 Engauge
The HCI-HAO (board ID = 11) has following two functions:
Function Category Type Sub-type
1 - HART communication Communication Instrument slave HART
2 - Analog output Sensor Analog output 4 - 20 mA
20 mA
4 mA
Time
analog signal digital FSK signal