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8.5. HHT Interface
Navigation
The Hand-Held Terminal interface consists of a
simple series of screens and menus.
8.5.1. Scrolling Through The Hand-
Held Screens
The up arrow and down arrow keys are used to
scroll through the screens. Some of these screens are
read-only, others are either menus that require you to
enter a selection or are configuration screens that have
one or more editable fields. The right arrow and left
arrow are used to select editable fields.
8.5.2. Shortcut Keys (F1 and F2)
At any time, you may press the F1 key on the
Hand-Held Terminal to return to the Home Screen, or
F2 to view the first status screen.
8.5.3. ACC HHT Network Setup
When the ACC is connected to the HHT for the
first time using the HHT protocol, the Network Setup
menu will be displayed.
SELECT
1= SLAVE TERMINAL
2= ACC HHT MODE
3= UPGRADE ACC FW
SLAVE TERMINAL: Returns the HHT into a mode
controlled by the host.
ACC HHT MODE: Enter the mode where the
MODBUS port runs the standard HHT dumb terminal
protocol.
UPGRADE ACC FW: Upgrade the firmware of an
ACC to the version loaded on the HHT.
NOTE: Press F1 for approximately 6 seconds
to return to this screen at any time.
8.5.3.1.
Modes of ACC Addressing
The ACC can be addressed in two different ways,
via the dip switch on the unit or by using the HHT to
set the address over MODBUS. If you are setting the
address with the HHT, all the dip switches must be set
to 0 or OFF, and you must be directly connected to the
HHT Interface Navigation
HHT ONE-ON-ONE connection type (no other
nodes connected to the network). See Section 8.5.8.
for details.
If setting the address via the dip switches, set the
address to match the dip switch numbering in the
HHT Network Setup Screen (ADDR: 1).
Selecting option 2 (ACC HHT MODE) will lead
you to the Network Setup screen.
ACC SETUP
BAUD
: 19200
PARITY : NONE
ADDR
: 1
The network screen will display the baud rate, ad-
dress, and parity selection. A baud rate of 19200 is
recommended, set the parity to NONE, and choose
the address of the ACC unit you need to access. A
message will then appear:
WAITING CONNECT
TO MASTER CNTRL
Once you are in the ACC HHT mode, it will
display the ACC home screen (see Section 8.5.4.).
To leave ACC HHT mode to access another ACC,
press F1 for approximately 6 seconds. You will see
the Home Screen for the HHT shown at the start of
Section 8.4.
8.5.4. The ACC HHT Interface
8.5.4.1.
ACC Start Screens
CONTROL LINK ACC
815 - 6100
VER: 1.00F01-01
(PRESS )
After finishing the initial setup, the HHT display
will show the model type, the part number, and the
firmware revision.
The fourth line of the home screen will flash and
display failure information if the HHT detects an
internal or communication problem after its power-
up. If more than one failure exists, information will be
displayed according to the following priority order:
• FAIL: FLASH/CLK: The flash memory on the
The ACC Hand-Held Terminal Interface • 23
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