background image

  8

000), over/underflow characters are shown. If the num-
ber was ununderstandable (no numerical characters),
dashes are shown.

Overflow

[ ^ ^ ^ ^ ^ ^ ]

Underflow

[ _ _ _ _ _ _ ]

Not valid

[ - - - - - - ]

Examples

Message

Display

_3_ _ _

[           3 ]

-_ _ 4 . 5

[       - 4.5 ]

66.666

[       6 6.7 ]

(Dec=1)
999.9999

[ 1 0 0 0.0 0 ]

Reading front panel keys

The front panel keys of X-2071 can be read externally
using serial bus commands. This way 2071 can be
used for controlling other systems.

Reading the keys is possible with SCL protocol only.
Key combinations 

▲★

 and 

▲▼★

 cannot be used

beause they activate the configuration state.

2071 is a slave on the bus: it cannot send the key
information on the bus by its own, it must be asken by
a master.

Buffered method

Send command KEYB with no parameters for 2071.
The response consists of a single hexadecimal
character (0…9, A…F, Ascii 48…57, 65…70) and
possibly a letter L (76).

The hex character represents the key status so that
the lowest bit corresponds to the leftmost key (1).
Näppäin

Koodi

1

2

4

8

If several keys are pressed simultaneously, the sum
of these codes is returned. E.g. keys 

 and 

: the

code is 4+8 = C in hexadecimal. When no keys is
pressed, the value is 0 (zero).

The code is succeeded with letter L (e.g. 1L), if the key
has been held pressed more than 0.5 seconds.

When using KEYB command, 2071 uses a buffer to
store key presses (max 8 presses). If a key has peen
pressed and released before KEYB command is
used, 2071 will remember the press and return it with
the next KEYB command. Similarly, if there has been
several keypresses, each of them is buffered ad then
returned one by one with every KEYB command.

If four buttons is not enough, one of the buttons can
be reserved as a shift key that doubles the functions
of the other keys. An excellent choice is 

; remember

that combination 

▲★

 is not available. Without "shift"

pressed, the other buttons return 1, 2, and 4. With shift

 pressed, they return 9, A, and C.

Unbuffered method

If key buffering is not desired, instead it is more
important to know the exact state of the keys in real
time, use KEY command. The response is similar to
KEYB command, with exception the L suffix is not
used.

Содержание 1000F-2071

Страница 1: ...1 Manual Model 575F 2071 1000F 2071 1100F 2071 and 1800X 2071 Serial input RS232 RS485 No 290507 Nokeval...

Страница 2: ...meters 4 Case dimensions 4 Configuration 5 Serial protocol SCL 6 Counting check sum 6 Example of control message without BCC 6 XOR function without calculator 7 Non addressable ASCII protocol 7 Displa...

Страница 3: ...okeval SCL protocol where only the address value and check sum are sent The displays come standard with both the serial inputs RS 232 and RS 485 The serial bus is galvanically isolated from the proces...

Страница 4: ...econds Specified instructions on pages 6 7 Configuration Resetting configuration parameters Some times it is necessary to return indicator parameters to factory defaults e g if secret access code is m...

Страница 5: ...ddressable SCL or non addressable ASCII Baud Baud rate selection 300 600 1200 2400 4800 9600 19200 Addr Serial address 0 127 SCL only Bcc Checksum selection ON used SCL only Resp Responce message sele...

Страница 6: ...ost significant bit is set If you want to command a device in address 4 the ID byte will be 132 or 84h This is a single byte whose value is 132 do not send individual numbers 1 3 and 2 The command is...

Страница 7: ...esults the Numerical mode is more flexible TEXT Mode In the Text mode X 2071 doesn t process the mes sage in any way The first received message is placed at the leftmost position of the display and so...

Страница 8: ...pp in Koodi 1 1 2 2 3 4 4 8 If several keys are pressed simultaneously the sum of these codes is returned E g keys and the code is 4 8 C in hexadecimal When no keys is pressed the value is 0 zero The...

Страница 9: ...al RS 485 loop last unit must be terminated with 110 ohm resistor Termination can be done on terminal connections or by connecting short cut jumper into following position Fail safe ON Terminator ON F...

Страница 10: ...put thermocouple strain gage etc Additional slots Additionalcardsprovideoutput 4 20 mA alarms serial inter face BCD output etc Meter data sheet dictates possible combinations greyconnectors allowlinev...

Страница 11: ...Modular field display series 575F 1800F 6543 21 4 6 digit red LED display Power supply 85 240VACor 12 32VDC 24VAC Optioncards Alarm cards 2 relay card 4 alarm types change over contacts 3 relay card c...

Страница 12: ...12 Yritt j katu 12 Tel 358 3 342 4800 Fax 358 3 342 2066 FIN 37100 NOKIA email support nokeval com http www nokeval com Nokeval Oy...

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