15
4.7 Other Tasks
4.7.1 Automatic Polling
When online, the HK-H375A Hand Held Communicator will poll automatically the online
devices at address 0. If not connected to a device, the Communicator will display the
message “No device found at address 0, Poll?” Select “YES”, then the Communicator will
poll automatically all the devices connected from address1 to address 15.
When several devices are connected in the same loop, each device must be assigned a
unique address. If two devices share the same address, the communicator will not be able
to find the devices. At this point, the devices will need to be connected separately to
correct the polling address. HART Protocol defines the communication mode of
connecting several devices in the same loop as multidrop mode. Under multidrop mode,
the current in the loop will not be current signal of 4~20mA standard, but the sum of the
output current from all the devices.
4.7.2 Download
Follow the menu operation sequence shown below to access Download:
Main Menu
→
2 Download.
This function is designed for customers to easily update the DD in the HART
Communicator. We will update the DD periodically. Please do not hesitate to contact with
us for the relevant technical support.
This function is associated with the special PC software, downloading the target file into
the HART Communicator at the default baud rate 38400bit/s.
When the interface displays “Download target file”, select “OK”, then the download starts
and the Communicator will display “Please wait a moment...” When the download finished,
it will go back to the Main Menu.
Note: Please do not use this function without proper PC software and guidance from the
manufacture,
4.7.3 Battery
Follow the menu operation sequence shown below to access the Battery:
Main Menu
→
3 Battery.
This function will check the remaining battery capacity and display it in percent (%). When
the battery capacity is too low, please change the batteries at once to avoid influence on
the normal use of the Communicator.
