HART Communication
4
TI 12A01F01-61EN
Nov. 20, 2018-00
1.2.1
Multi-drop mode
Multiple number of field devices put in multi-drop mode can be connected in parallel on a single
cable. To enable the multi-drop mode, set the device address to a unique number from 1 to 63.
NOTE
Multi-drop mode communication requires the devices on the link to be given unique device
addresses for polling (polling addresses). If the same address is set in two or more devices,
correct communication is disabled.
Canceling multi-drop mode:
To release a device from the multi-drop mode, set the polling address to zero.
1.2.2
Write protection
Turning the slide switches ON disables the setting via HART communication (default: OFF).
If you create a password at "Setting" on the display, it protects HART setting, disabling writing
over HART parameters. See 1.3 in
1
ON
2
Front view with the front panel opened
Reboot switch
(Do not use it)
Slide switch
(for HART only)
Figure 2
FLXA402
CAUTION
Slide switch 1 is for HART. DO NOT turn ON the Slide switch 2.
CAUTION
DO NOT push the button switch next to the Slide switches, when they are set to ON/OFF.
Nov. 20, 2018-00