Duemmegi DISP 2 User manual

DISP2
Rel.: 2.0 - September 2004 - Page 1
ALARMS AND MESSAGES DISPLAY
DISP 2
User’s Manual
Notes:
Information in this document may be modified without notice.
For additional information and details contact: DUEMMEGI srl, via LONGHENA 4 - 20139 MILANO – ITALY - Tel.: 02 / 57.30.03.77
Fax: 02 / 55.21.36.86

DISP2
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INDEX
1- INTRODUCTION.............................................................................................................................................................2
2- DISP2: GENERAL CHARACTERISTICS ........................................................................................................................2
3- CONNECTIONS..............................................................................................................................................................3
3.1- Electrical insulation of the inputs..............................................................................................................................5
4- OUTLINE DIMENSION....................................................................................................................................................5
5- TECHNICAL DATA..........................................................................................................................................................6
6- OPERATING OPTIONS ..................................................................................................................................................6
7- OPERATION ...................................................................................................................................................................8
7.1- Pushbuttons function and keyboard lock..................................................................................................................8
7.2- Centralized alarm outputs and “first out” ..................................................................................................................9
7.3- Messages displaying in MEM or NOMEM modes ....................................................................................................9
7.4- Reset of the queue...................................................................................................................................................9
8- PROGRAMMING...........................................................................................................................................................10
8.1- Manual programming by the panel buttons ............................................................................................................10
8.2- Programming by Personal Computer.....................................................................................................................11
1- INTRODUCTION
The displays of DISP2 family by DUEMMEGI are devices allowing to report, in a customized way, messages for
controlling purpose in many applications, such as industrial and domestic plants. Thanks to the flexibility of these
devices, the displays of DISP2 family make easy to understand any information related to the occurrence of alarms or
events. These devices may be employed in several applications as in the following examples:
Machinery Building automation
Industrial processing Home automation
Plants Alarm signaling
DISP2 replaces the old family of messages display made by the models DISP16D, DISP15B, DISP31B, DISP63B,
DISP127B and DISP255B. This because DISP2 device may be set by the user for operation with direct inputs (up to 16
messages) or for operation with binary code input (up to 255 messages). Moreover, in respect to the previous family,
DISP2 performs several features as listed in the following paragraph.
2- DISP2: GENERAL CHARACTERISTICS
¾LCD display 2 x 16 characters with back-lighting ¾1 alarm pending message made by 2 lines
¾LCD contrast may be adjusted by the button on the
front panel
¾Cyclic displaying of more messages; the cycle time
may be set by user in the range 1 to 10 seconds
¾Message programming by front panel pushbuttons or
by PC
¾Events storing (MEM) or current status display
(NOMEM)
¾Messages and parameters stored into DISP2 memory
may be read by a PC
¾Events are displayed in chronological order (up to 64);
information about the total amount of pending alarms
¾The inputs may be insulated by internal photo-
couplers
¾Internal buzzer for alarm acoustic signaling; the
buzzer operation may be disabled
¾16 messages direct mode or 255 messages binary
mode
¾2 potential free contacts (internal relays) for additional
acoustic/visual signaling (siren and flasher)
¾In direct mode each input may be set for NO or NC
operation
¾2 inputs for remote ACK and RESET commands
¾Up to 255 messages, each one made by 2 main lines
and 2 hidden lines
¾1 base message made by 2 lines (stand-by message)
¾Keyboard lock to avoid unwanted operations by
unauthorized personnel
The firmware of DISP2 device may be updated directly by the user through a PC and the RS232 communication port;
this feature allows future developments of the product concerning new functions and possible special versions. For more
details about this feature, contact DUEMMEGI commercial office.

DISP2
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3- CONNECTIONS
The terminals of DISP2 devices have a different meaning depending on the chosen setting among direct and binary
mode. The two following tables list the meaning in the two cases.
DISP2 set for direct inputs: terminal description
1 – 16
Input terminals: each input is activated applying a positive voltage to the related terminal; if
the electrical insulation of inputs is not needed, the COM terminal must be used to supply
the inputs (through free potential contacts). The status of each input, to be accepted, must
be stable for 50 msec minimum.
INS This terminal allows the electrical insulation of the inputs (see next paragraph); connect
this terminal to 0V of the external voltage source used to supply the input terminals
COM Positive voltage output to be used as common terminal of the contacts connected to the
inputs
SUPPLY Power supply input: 24 Vac/dc ±20% (refer to the shown polarity when supplied by a dc
source)
SERIAL PROGRAM Connector for the serial programming trough a PC
OUTPUT CONTACTS
N.O.: Relay output contact for external alarm device (e.g. siren)
N.C.: Relay output contact for external alarm device (e.g. flasher)
Note: since the flasher output is a normally closed contact, then the signaling on the
flasher is guaranteed even if the power supply of DISP2 fails.
EXT ACK
Input for remote acknowledgement pushbutton; the external pushbutton must be
connected to this terminal and to «COM» (but only if the electrical insulation of the inputs
is not needed)
EXT RESET Input for remote reset pushbutton; the external pushbutton must be connected to this
terminal and to «COM» (but only if the electrical insulation of the inputs is not needed)

DISP2
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DISP2 set for binary code input: terminal description
1 – 8
Binary code input terminals: each input is activated applying a positive voltage to the
related terminal; if the electrical insulation of inputs is not needed, the COM terminal must
be used to supply the inputs (through free potential contacts). Each applied binary code
recalls the related message; the less significant bit is terminal 1, the most significant bit is
terminal 8. The applied binary code at terminals 1 ÷8 will be read by DISP2 when
STROBE input is activated. The status of each input, to be accepted, must be stable for 50
msec minimum.
9
STROBE
DISP2 reads the binary code input when this STROBE input is active (positive voltage
applied to the terminal)
12
CLEAR ALL + STROBE
Clear the current messages queue when a positive voltage is applied both to this terminal
and to the STROBE terminal
13
CLEAR ALL Clear the current messages queue (regardless of the status of STROBE input)
14
CLEAR ONE + STROBE
At the STROBE activation, the message related to the binary code currently applied to
inputs 1 ÷8 will be removed
INS This terminal allows the electrical insulation of the inputs (see next paragraph); connect
this terminal to 0V of the external voltage source used to supply the input terminals
COM Positive voltage output to be used as common terminal of the contacts connected to the
inputs
SUPPLY Power supply input: 24 Vac/dc ±20% (refer to the shown polarity when supplied by a dc
source)
SERIAL PROGRAM Connector for the serial programming trough a PC
OUTPUT CONTACTS
N.O.: Relay output contact for external alarm device (e.g. siren)
N.C.: Relay output contact for external alarm device (e.g. flasher)
Note: since the flasher output is a normally closed contact, then the signaling on the
flasher is guaranteed even if the power supply of DISP2 fails.
EXT ACK
Input for remote acknowledgement pushbutton; the external pushbutton must be
connected to this terminal and to «COM» (but only if the electrical insulation of the inputs
is not needed)
EXT RESET Input for remote reset pushbutton; the external pushbutton must be connected to this
terminal and to «COM» (but only if the electrical insulation of the inputs is not needed)

DISP2
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3.1- Electrical insulation of the inputs
The inputs may be electrically insulated from the DISP2
circuit; to do this, move the internal jumper a shown in
the first case of the figure on the right side, and connect
the 0 volt terminal of the external supply source to the
terminal «INS» of DISP2. If the electrical insulation is
not needed, use terminal «COM» to supply the external
contacts connected to the inputs, and move the jumper
as shown in the second case of the figure.
The factory setting of this jumper is for NO electrical
insulation.
4- OUTLINE DIMENSION
PANEL HOLE

DISP2
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5- TECHNICAL DATA
Power supply 24V ~ / ±20%
Current consumption:
at 24V
at 24V ~
110mA MAX
200mA MAX
Input current (each input) 5mA @ 24V
Allowed voltage on the inputs 12 ÷30V
Output contacts:
Max switching voltage
Max switching current
Max operating power
60Vdc or 125Vac
1A
30W dc – 60VA ac
PC interface RS232C full duplex opto-coupled
Display LCD with back-lighting
Characters (each line) 16
Lines 2
Characters height 8mm
Number of messages In direct mode: 16 x 4 lines + 1 x 2 lines (stand-by message) + 1 x 2 lines
(pending messages)
In binary mode: 255 x 4 lines + 1 x 2 lines (stand-by message) + 1 x 2 lines
(pending messages)
Connections By removable terminal blocks
Protection degree Front: IP 53 – Back IP20
Operating temperature 0 ÷+50°C
Storage temperature -10 ÷+70°C
6- OPERATING OPTIONS
DIRECT OR BINARY MODE
DISP2 may be set for two distinct operation modes, each one corresponding to a different handling of the information
coming from the inputs as here explained.
16D: the 16 inputs are handled one by one in direct mode; this means that each input is related to a well defined
message. The amount of message, in this mode, is 16.
255B: the inputs 1…8 are handled as binary code (input 1 is the less significant bit and input 8 is the most significant bit);
this means that each code is related to a well defined message. The amount of message, in this mode, is 255.
The setting of the direct/binary mode can be done only by the configuration program DISPTools running on the PC.
ALARM OUTPUTS
Each message of DISP2 (regardless of direct or binary mode) may be set to cause or less the activation of the 2
centralized alarm outputs (siren and flasher) and of the buzzer (if enabled). In other words, the difference between the
two settings only concerns the handling of the two centralized alarm outputs (siren and flasher) and the buzzer (if
enabled): a message having the alarm outputs enabled will cause the activation of siren, flasher and buzzer, while a
message having the alarm outputs disabled will not cause any action on these devices.
The setting of the ALARM OUTPUTS for each message can be done only by the configuration program DISPTools
running on the PC.
DISPLAY CONTRAST
The contrast of the LCD display may be adjusted according to the user preferences. To execute this adjustment, enter in
the DISP2 setting menu pushing down at the same time the buttons + + and move in the menu until
the DISPLAY CONTRAST parameter is reached using the buttons and . To modify the displayed
parameter refer to paragraph 8.1.
The setting of this parameter can be done through the keyboard on DISP2 front panel or by the configuration program
DISPTools running on the PC.

DISP2
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MEMORY OPTION
MEM (memory): the input activation occurrence will be stored; in other words, the related message remains in the queue
even if the input has been de-activated.
NOMEM (no memory): the displaying cycle shows the current condition of the inputs; this means that each message will
be automatically removed from the queue when the related input is de-activated.
The cyclic displaying occurs both in MEM and NOMEM mode, but in the first case DISP2 shows all messages related to
the inputs activated after the last reset, while in the second case DISP2 shows only the messages currently activated.
To modify this option, enter in the DISP2 setting menu pushing down at the same time the buttons + +
and move in the menu until the MEMORY OPTION is reached using the buttons and . To modify
the displayed option refer to paragraph 8.1.
The setting of this option can be done through the keyboard on DISP2 front panel or by the configuration program
DISPTools running on the PC.
BUZZER OPTION
BUZZER ON: this option enables the buzzer inside DISP2. This is a global option, because it applies to all messages.
The buzzer, if enabled, follows the status of the siren relay.
Note: the buzzer, as for the siren and flasher outputs, will be activated only for the messages that were configured for
this function.
BUZZER OFF: this option disables the buzzer inside DISP2 for all alarm messages (but siren will be however enabled).
To modify this option, enter in the DISP2 setting menu pushing down at the same time the buttons + +
and move in the menu until the BUZZER OPTION is reached using the buttons and . To modify
the displayed option refer to paragraph 8.1.
The setting of this option can be done through the keyboard on DISP2 front panel or by the configuration program
DISPTools running on the PC.
CYCLE TIME
This parameter identifies the time between the displaying of a message and another one. Allowed values are in the
range 1 to 10 seconds, with 1 second step.
To modify this parameter, enter in the DISP2 setting menu pushing down at the same time the buttons + +
and move in the menu until the CYCLE TIME is reached using the buttons and . To modify the
displayed parameter refer to paragraph 8.1.
The setting of this parameter can be done through the keyboard on DISP2 front panel or by the configuration program
DISPTools running on the PC.
INPUT LOGIC (for direct mode only):
When DISP2 is set for direct mode operation, the input logic, for each one of the 16 inputs, can be set to normally open
logic (O, the message will be shown at the contact closing), or normally closed logic (C, the message will be shown at
the contact opening).
To modify this option, enter in the DISP2 setting menu pushing down at the same time the buttons + +
and move in the menu until the SET NO/NC option is reached using the buttons and . The display
will show a sequence of 16 symbols “O” and “C (respectively for N.O. and N.C. setting); the first symbol on the left side is
referred to input 1, the last symbol on the right side is referred to input 16. To modify the displayed options refer to
paragraph 8.1.
The setting of this option can be done through the keyboard on DISP2 front panel or by the configuration program
DISPTools running on the PC.

DISP2
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7- OPERATION
DISP2 shows for 2 seconds about, at power on, the current setting as here bottom listed:
¾on the first line: DISP2, direct (16D) o binary (255B) mode, firmware release (e.g. 1.0)
¾on the second line: memory (MEM) or no memory (NOM) mode , buzzer enabled (BZ=ON) or disabled (BZ=OFF),
cycle time (e.g. T=2s)
When no messages are pending, the stand-by message is
displayed (line 1 and line 2 of the message zero). At the
activation of an input, the related message will be recalled from
the internal memory and shown on the display (line 1 and 2).
This message will be cyclically displayed together to the alarm
pending message (line 3 and line 4 of the message zero) with a
time period chosen by the user in the range 1 and 10 seconds.
Pushing the button during the displaying of a message, the line 3 and 4 of the message itself will be shown.
Pushing the button when one ore more messages are pending, it is possible to change between automatic and
manual displaying; in manual mode, it is possible to display the previous and the following messages using the buttons
(next message) and (previous message). To restore the automatic scrolling of messages push the button
.
If another input is activated, the related code will be added to the displaying cycle (queue) and the scrolling is always
restored to automatic mode. All pending messages will be displayed in chronological order as they occur. The first
message after the alarm pending message is the first occurred event, the next one is the second and so on. The number
on the bottom left side in the alarm pending message is the total amount of messages in the queue. DISP2 can store up
to 64 message in chronological order.
7.1- Pushbuttons function and keyboard lock
The 6 pushbuttons on the front panel, during normal operation and regardless of the chosen operating mode, perform the
following functions:
ACK: acknowledge, siren silencing and displaying of the first occurred event (“first out”)
Request of queue reset; the confirmation must occur within 3 seconds by pressing the ACK button
Show next message when the manual scrolling of messages is enabled
Show previous message when the manual scrolling of messages is enabled
Switch from the automatic to manual scrolling of messages and vice-versa. DISP2 returns to automatic
scrolling at the activation of a new input
Show the auxiliary lines of the current message (lines 3 e 4 of each message). The displaying of auxiliary
lines, in automatic cyclic mode, remains until the cycle time T (set by the user) elapses.
During the manual displaying mode, lines 3 and 4 remain on the display until the pressing of button
or
The keyboard can be locked pushing and holding down the buttons for at least 3 seconds
(display will show “Keyboard Disable” for some seconds). To unlock the keyboard press and hold down the same buttons
for at least 3 seconds (display will show “Keyboard Enable” for some seconds).
During the programming mode, these pushbuttons perform other functions; refer to the related paragraph for details.

DISP2
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7.2- Centralized alarm outputs and “first out”
As said in a previous paragraph, each message of DISP2 may be set for the activation or less of the centralized alarm
outputs (siren and flasher).
If a message has the centralized alarm outputs disabled, then it does not affect the output relays, and the activation of
the related input simply will cause the displaying of the message.
If instead a message has this function enabled, then the siren output relay will be energized and the flasher output relay
will be de-energized at the activation of the related input (or binary code); this means that both signaling devices will be
activated.
To silence the siren press the button (but the flasher remains activated); the siren will be restarted at the
activation of a new alarm not yet inserted in the queue. Every pressing of the button will cause the displaying of
the first message in the queue, that is the first occurred event (“first out”).
To reset the flasher, all alarms in the queue must be removed by the reset sequence (if no more inputs or binary codes
are still active).
7.3- Messages displaying in MEM or NOMEM modes
If the NO MEMORY mode has been selected (NOM) the displayed messages show, in direct mode, the current condition
of the inputs in the chronological order they occurred. In binary mode, instead, the message related to the binary code
currently applied to the inputs will be displayed .
If the MEMORY mode has been selected (MEM), the displayed message show the inputs (or binary codes) that have
been activated from last reset sequence, in the chronological order as they occurred.
This last operating mode is the recommended when handling temporary events.
Note that if DISP2 is set for binary mode, the NOMEM setting should be avoided because, as said above, DISP2 will
show only the message related to the currently applied binary code; the NOMEM mode will be instead useful when
DISP2 is connected to an intelligent device (e.g. PLC) and DISP2 is used as a “monitor” of the PLC.
7.4- Reset of the queue
The reset sequence, in MEM mode, allows to clear the displaying queue; this means that all messages in the queue
related to the inputs that are not still active will be removed.
The reset sequence is the following:
¾Silence the siren pressing the button
¾Press the button ; DISP2 will display the message as
in the figure here shown
¾Press the button within 3 second to confirm the
clearing of the queue
If no confirmation occurs within 3 seconds, then the reset sequence will be automatically aborted.

DISP2
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8- PROGRAMMING
8.1- Manual programming by the panel buttons
The message and parameters programming may be executed by the front panel keyboard of DISP2 or by the program
DISPTools running on a PC connected to the display through RS232 port (this last solution is faster and easier).
To enter the programming mode of DISP2, press down at the same time the buttons + + .
During the manual programming the display shows the number of the current message and the number of the current
line on the first line, and the text of the related message on the second line. First displayed line is 000,0 (message 0 line
0) and it is related to the input logic programming. The parameters and options that can be modified are:
¾LCD display contrast
¾MEM/NOMEM option
¾BUZZER ON/OFF option
¾Cycle time for messages scrolling
¾NO/NC setting (for direct mode only)
¾Messages text
The programming procedure counts two operating modes:
•Search of the parameter or option or message to be modified
•Parameter or option or message edit
These modes can be easily identified because in the edit mode a cursor under the current character to be edited is
shown (the cursor is a small line under the character); the cursor is not displayed during searching mode.
Note: direct/binary and centralized alarm outputs options cannot be changed from the DISP2 keyboard; these options
can be changed by the PC only (see next paragraph).
In the searching mode the pushbuttons perform the following functions:
Next message or parameter. Hold down this button to quickly scroll
forward the searching.
Previous message or parameter. Hold down this button to quickly
scroll backward the searching.
o
Enter the edit mode.
+
Quit programming.
In the parameter edit mode the pushbuttons perform the following functions:
Increase the parameter. Hold down this button to quickly scroll
forward.
Decrease the parameter. Hold down this button to quickly scroll
backward.
+
Save the current parameter and go to searching mode.
+
Quit programming without saving.
In the message edit mode the pushbuttons perform the following functions:
Next character. Hold down this button to quickly scroll forward.
Previous character. Hold down this button to quickly scroll backward.
Move cursor to right.
Move cursor to left.
+
Save the current parameter and go to searching mode.
+
Quit programming without saving.

DISP2
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8.2- Programming by Personal Computer
DISP2 features a DB9 connector to allow the connection to a PC through the RS232 serial port.
The connection cable to be used is of standard type with a 9-way male connector on a side and a 9-way female
connector on the other one. The connections between this two connectors are pin to pin (pin 1 to pin 1, pin 2 to pin 2 and
so on); all pins must be connected.
The operating parameters, options and messages of DISP2 can be fully programmed by the PC; in addition, the reverse
operation can be also performed, so it is possible to read all parameters, options and message stored in the DISP2.
The PC must be equipped with a program named DISPTools and free distributed by DUEMMEGI. This program runs in
Windows 98, 2000, XP, NT.
For detail on using DISPTools refer to the on line help of the program itself.