Nokeval 6790 User manual
1
Nokeval Hand-held programmer6790
Introduction ................................................................................................. 2
Functional states ......................................................................................... 2
Powering up and communications setup .................................................... 2
Monitor state ............................................................................................... 3
CONF-state ................................................................................................. 3
Editing ......................................................................................................... 3
Entering password ...................................................................................... 4
Powering off ................................................................................................ 4
Programming cable ..................................................................................... 4
Battery......................................................................................................... 4
Interface ...................................................................................................... 5
Menu structure ............................................................................................. 5
2
Introduction
6790 is a hand-held programming device able to
configure devices supporting Nokeval Meku
configuration language. However, 6790 cannot edit
text strings.
Meku is a set of definitions and commands, by which
the programming device is able to read the menu of
the target device and modify the settings associated
with them. The menus can be hierarchic.
There are six keys (buttons). See the last page of
this manual of their general usage.
Functional states
The main states of 6790 are shown in the label back-
side of 6790 and on the last page of this manual.
After powering up, 6790 is in Communications setup
menu (see later), where the connection to the target
device is established. When the connection is up,
6790 is in monitor state and the measurement values
can be observed like on a panel meter.
When in monitor state, you can enter configuration
state and then exit to the monitor state. When exiting
monitor state, the connection is closed and 6790 is
in the communications setup again and may be
powered down.
Powering up and
communications setup
6790 is powered up by holding ➤pressed down about
one second. Software version of 6790 is displayed
briefly.
After power-up, you can set up communications
parameters for 6790 to match those on the target
device. There is three things to set up: Baud, Addr
and Slot. You can edit these by selecting them with
▲▼ keys and pushing ➤; exit with ★when done.
Finally select Conn and push ➤ to connect.
The comm setup menu items are:
CONN
6790 attempts to open a connection to the target
device with the parameters selected on comm setup
menu. While attempting, a exclamation mark (!) is
shown on the display (unless Auto baud is used in
which case the probed rate is displayed). If no
response is heard in 1 seconds, 6790 gives up and
returns to the communications setup. In case the
attempt is successful, 6790 transits to monitor state
(see Monitor state).
SLOT
If the target device has several active cards with
separate menus, these cards can be addressed with
slot number. With simple devices like 6720, set slot=0.
ADDR
6790 sends its commands using Nokeval SCL
protocol, where is a device address number (0..127)
on the RS-485 bus. When using direct cable
connection, most devices will respond in any address
and this setting is trivial.
BAUD
Select the baud rate that matches the target device.
Most devices (e.g. 6720 and 6740) use 9600 baud.
Devices that have a RS-485 connection can be set
on different baud rates; if the rate is not known, Auto
baud setting is useful. Note that this setting does not
change anything in the target, but this setting must
be matched to make the connection possible.
24 VDC
+
-
Pt100
3
Display Brightness
While in comm setup menu (display Conn, Baud, Slot
or Addr), it is possible to adjust the display brightness.
Hold down the Shift key and use ▲▼ keys to adjust.
The dimmer the display, the longer battery life.
Monitor state
When 6790 is succeeded to connect to a device, the
measurement results or other live values are shown
on the display. This is called monitoring.
You can use keys to:
▲▼ Changes target of monitoring (e.g. Input
or Output); select on list displayed and
push ➤.
➤Display diagnostic message (s) from the
device (e.g. WBk=sensor wire break).
If there is no messages, monitoring
continues.
★Disconnects from the device and returns
to the comm setup menu. Please do this
always before physically disconnecting
6790 from the target.
Conf Enters configuration state. See Conf
state.
Shift+Conf Shift+Conf Enters Configuration state
but in the main menu of the target
device. Here you can access calibration
and monitor menu. Please do not enter
main menu unless necessary.
Shift+▲ ▼ Adjusts number of decimals on the
display.
CONF-state
In Conf state the configuration menu of target device
is shown. You can select menu items with ▲▼ keys
and modify the selected item by pushing ➤key. When
the value is OK, push ★to get back to the menu. You
can select the next item and edit it and so on.
Some menu items are not settings but lead to a new
menu, called submenu. Menu is arranged
hierarchically to shorten up single menus. You can
back to the previous menu with ★key again. See the
target device manual; usually there is a menu map to
ease up navigation.
6790 has five digit/letter display. If the item name is
longer than fits in the display, the rest can be viewed
with Shift key.
When a menu item is selected (but not being edited),
you can issue Lock and Free commands for that item.
These are additional functions not normally needed.
The purpose of them is explained in the target device
documentation. Lock and Free are given by holding
down Shift and then using ➤or ★key, respectively.
When all is set up, it's time to exit configuration menu.
Exiting is done by ★key, of course. If the menu has
option to Save (write the settings made to the target
device non-volatile memory) or Undo (retrieve the
previous settings discarding those just done), these
options are shown and you must accept either using
➤key.
Keys:
▲▼ Selecting (among parallel options)
➤Editing; entering submenu; accepting
Save/Undo
★Exiting
Shift Scrolling the display
Shift+➤Lock-command
Shift+★Free-command
Editing
There are several possible types of data 6790 can
edit.
ON/OFF
Displayed "Yes" or "No". Select with ▲▼ and exit
with ★.
An example: selecting bipolar measurement mode.
Integer
One digit blinking. Digit may be adjusted with ▲▼.
Move the cursor (blinking) with ➤. Exit with ★.
Example: serial address.
Decimal number (floating point)
One number or decimal point blinking. Adjust with
▲▼. Move cursor (blinking) with ➤. The leftmost digit
may be adjusted to be minus sign. Exit with ★.
Example: output scaling.
List of options
Select the desired option using ▲▼. Exit with ★.
Example: input type.
Password setup
There is OFF or SET on the display depending on if
the password is currently activated. To set a
password, select SET and push ➤key. Display is
changed to COD 0 and now you can define the
password. The password must be entered twice; if
they mismatch, "OFF" is displayed and you must re-
try. See next chapter on how to enter passwords.
Finally exit with ★.
4
Entering password
You are asked to enter password when there is
"COD 0" on the display.
A password consists of six keypresses using keys
▲▼★➤. However, the password ★★★★★★ means
no password and cannot be used.
The number after COD indicates the count of
keypresses given so far.
In Nokeval 2000 panel meters the keys are arranged
in a row ▲▼★➤. To ease up remembering
passwords, you may think the keys be numbered
respectively 1234. See the backside label of 6790.
This is also necessary to be able to enter the
password in Mekuwin configuration program.
Example: in Mekuwin you have set password 123111.
When using 6790, this is entered ▲▼★▲▲▲.
The password is still easier to remember if letters are
assciated according to the diagram (this is also
compatible with Mekuwin):
Powering off
If you are still in monitor state, please exit to the
Communications setup before disconnecting the
cables. To exit, use ★key until there is Conn in the
display.
If there is no more devices to configure, you can shut
6790 down with ★key (needs one second press).
If there is problems with communications and 6790
keeps waiting and does not respond, you can press
★key for 6 seconds to terminate the connection
immediately. If this does not work, disconnect the
battery for a couple of seconds.
6790 powers itself down if the keys are not used for 5
minutes. This is to save batteries.
Programming cable
You can use both Mono (2 pole) and Stereo (3 pole)
cables with 3.5mm plug connectors. 6790 connects
the Stereo middle pole to the ground making the cable
like Mono. The cable is recommended to be no more
than 1 meters long.
COMMUNICATION FAILURES
If 6790 does not receive a response from the target
device in one second, it shows a blinking exclamation
mark (!) and requests the user to choose:
1. Just wait for the device to respond (some
commands like calibration commands may take
several seconds),
2. Re-transimt the command using ➤key, OR
3. Terminate the connection with ★key.
Battery
6790 is powered by a 9V battery (6F22). To change
it, open the battery lid backside of 6790. No need to
open screws. If the display brightness varies, there
is need for a new battery. A weak battery can cause
connection drop-outs. Very weak battery makes 6790
to turn itself off.
It is possible to use a rechargeable 9V battery.
Recharging must be done externally.
The power consumption depends heavily on the
display brightness; see Communications setup on
how to adjust it.
▲
★
▼
➤
1
A B C
D E F
5 9
3
M N O
P Q R
0 7
2
G H I
J K L
6
4
S T U V
W X Y Z
8 *
DISABLE
5
Conn
Power Data Conf
Nokeval
6790
★
▲
▼
➤
Shift Conf
Interface
Power On LED
Data flow in cable LED
Cable connector
Configuration state LED
5 digit LED display
Selecting between options
Entering, editing
Exiting (state or menu)
Entering Configuration state
Special functions
Conf
Disconnecting
Connecting
Baud
Slot
Addr
Power off Conn
Monitoring
OK
COMMUNICATIONS
SETUP MONITOR STATE
TARGET
DEVICE'S
CONF-MENU
Undo
Save
★
➤ ➤
FAIL
★
★➤
➤
Menu structure
Table of contents
