ELAP CM78N User manual

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CM78N
OPERATING MANUAL
TECHNICAL SPECIFICATIONS
 AC SUPPLY: 230 or 115 or 24 Vac 50/60 Hz ±10% -4 VA (see the instrument label).
 DC SUPPLY: 24Vdc* or 12 Vdc* ±15% 4 W (see the instrument label).
*Remark: the supply negative pole (terminal 1) is connected to circuit 0 Volt (terminal 8).
 TRANSDUCER SUPPLY: 12 Vdc max 60 mA , 5 Vdc 60 mA optional (code X09)
 FUNCTIONAL INPUTS: accepting signals by NPN/PNP transducers (according to setting)
 INPUTS: closing T.min = 20 mS
 OUTPUTS: relay outputs with Normally Open contacts. I max 3A V max 220V
 COUNT FREQUENCY: 25 KHz (primary wave)
 MEMORY: Data, preselections and count record are stored on EEPROM.
COUNT INPUT SIGNALS
The instrument accepts count signals by:
 Monodirectional encoders with NPN open collector or push-pull output
 Bidirectional encoders with NPN open collector or push-pull output
 1 Namur inductor with NPN open collector or push-pull output
 2 Namur inductors with NPN open collector or push-pull output 90° degree out of phase
CONNECTION AND MAINTAINANCE
Link connections to the quick-coupling terminal box as mentioned in the enclosed diagram C2639.
To avoid damaging interference it is recommended, as for all low voltage equipment, to use a shielded cable for the
execution of connections and to separate the signal cable path of the counter from possible connection cables of power
utilities.
Counters do not require any particular maintenance. Keys shall not be pressed with sharp objects to avoid damaging of
the keyboard.
PRECAUTIONS
The visualiser is equipped with 2 command outputs which could get into an incoherent state in respect to the machine
working phase during the installing operations: it is recommended to put the machines in safety before starting the
configuring operations.
MANUAL STRUCTURE
Pages 1 to 3 of the present manual relate to the instrument
general working mode. Pages 4 to 6 relate to the operating way
of each operational mode.
The paragraph ‘Operating specifications’ – page 2 – gives details
about the instrument configurations.
SUMMARY page
Technical specifications...............................1
Introduction..................................................1
Operational modes description....................1
Operating specifications...............................2
Basic setting ................................................3
Specific setting.............................................3
Operational mode 0 .....................................4
Operational mode 1 .....................................5
Operational mode 2 .....................................6
INTRODUCTION
CM78N-C02 can be configured by the user to fit to different
operational modes.
The configuration is carried out in two phases:
Phase 1: Setting the basic operational mode
Phase 2: Setting the specific functions
In both phases the configuration is set by entering a numerical
code corresponding to the required operating options.
The available options are listed in the relevant tables at page 3 of
the present manual.
When the instrument is configured according to the requested
operational mode, it is necessary to enter its specific operating
parameters.
OPERATIONAL MODES DESCRIPTIONS
There are three basic operational modes available:
0) Position visualiser
1) Position visualiser with 2 settable thresholds
2) Absolute/relative position visualiser 2 settable thresholds
and 2 settable multiplying factors
A list of the main functions of the three different operational
modes follows:
OPERATIONAL MODE 0:
• Position visualisation
• Multiplying factor
• Count load
• mm/inch conversion
• Count/display block
OPERATIONAL MODE 1:
• Position visualisation
• Multiplying factor
• Count load
• mm/inch conversion
• Count/display block
• 2 alarm outputs
OPERATIONAL MODE 2:
• Absolute/relative position visualisation
• 2 multiplying factor which can be selected by input (the
number of decimals of the second factor can be set
separately)
• Count load
• Count/display block
• 2 alarm outputs
Program C.02.1
MULTIPURPOSE PROGRAMMABLE
POSITION VISUALISER

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OPERATING SPECIFICATIONS
POWER ON
At power on the display shows the current operational mode and
the identification of the sofware version.
DEFAULT CONFIGURATION (See the tables at page 3)
If not differently specified in the order, the instrument is supplied
with the following configuration:
Basic setting: F. 00000
Corresponding to: Position visualiser, count x 4, NPN inputs
polarity, no decimal digits, input IN3
function=count block
Specific setting: C. 00
Corresponding to: LOAD by keyboard enabled, LOAD by
input on the closure state
POSITION VISUALISATION
It is assumed by convention that the default display unit is mm.
This is in no way obligatory. Keeping to the convention makes it
possible to use the mm/inch conversion facility.
PULSES COUNT
For all the selectable operational modes the instrument main
function is counting the pulses provided by the connected position
transducer.
The options relating to this function are, in detail:
 bidirectional count x 4
 bidirectional count - direct
 monodirectional up-count
 monodirectional down-count
Bidirectional Count
The bidirectional count is obtained by exploiting the phase
difference between the transducer channels to discriminate
between up- and down-count.
Direct Count/Count x4
One bidirectional count pulse includes a complete pulse on both
count channels. Incrementing the count by one for each complete
pulse gives as a result the direct count. That means that using the
direct count mode the count value obtained for each encoder turn
corresponds to the transducer ppr number.
Each double-channel count has four fronts: 2 ascent fronts and 2
descent fronts. Counting all the fronts gives as a result a
quadrupled count number in respect to the encoder ppr number.
When calculating the multiplying factor it is necessary to pay
attention to the selected count mode.
Monodirectional Up- or Down-count
One single channel is used in this case, therefore the signals
cannot be used to discriminate the count direction.
The up or down direction count is chosen in the configuring
phase. The monodirectional count is always direct (x1).
MULTIPLYING FACTOR
The total value of the inputs counted according to the selected
mode is stored into the instrument count record. The count record
value is not displayed directly; the display value is the result of
the following calculation.
Display value = count record value x multiplying factor
This allows to display the counted pulses in the required
measuring unit.
The multiplying factor value can range between 0.01 and
9.99999.
MULTIPLYING FACTOR CALCULATION
To define the multiplying factor value it is necessary to know the
following data:
A: value that must be displayed for each encoder rotation.
The value must be expressed in the resolution unit used
for the visualisation (see the example)
B: number of the encoder pulses
C: set count mode (x1, x4)
The value of the multiplying factor is the result of the following
calculation:
Factor = A / (B x C)
To obtain that the visualised resolution is not beneath the real
resolution (B x C) must be ≥A.
EXAMPLE
Suppose you avail on 50 mm diameter measuring wheel coupled
to a 500 ppr encoder. You wish to visualise the displacement with
0.1 mm resolution.
The value to be displayed for each encoder revolution
corresponds to the measuring wheel development expressed in
millimeter-tenths. Therefore the wheel diameter must be
expressed in mm-tenths for the calculation of the wheel
develoment.
Data
A= 500 x 3.1415
B= 500
C= x4
Factor = (500 x 3.1415)/(500 x 4) = 0.785375
ALARM THRESHOLDS
Both operational mode 1 and 2make available two alarms, which
are enabled by comparison in respect to the displayed count
record value. In the setting phase the alarms are indicated as
positive stroke end and negative stroke end. The former is
enabled for value ≥the count record, the latter for value ≤than
the count record.
The alarms enabling is signalled by the relevant relay outputs
switching.
The operating mode of the two outputs can be selected: either
steady or by timed pulse. In case timed pulse outputs are
selected the required excitation time must be set in the relevant
parameter menu.
REMARK: For operational mode 2 the alarms can be enabled
either in comparison with the absolute record or with the relative
record (see the specific settings).
ABSOLUTE/RELATIVE COUNT RECORD DISPLAY
CM78N-C02 avails on two separate count records: the absolute
count record and the relative count record.
The absolute record is shown in the main display page; a starting
value (LOAD value) can be loaded into the absolute record by the
relevant terminal box input. The absolute record is usually
referred to the machine zero reference and the LOAD value is
only entered at the machine initializing phase.
Pressing the key P2 switches the visualisation to the relative
count record. In this phase a flashing dot appears on the display
second digit left.
The relative count record is an auxiliary visualization and can be
reset by pressing the key R. The relative count record is usually
referred to the working piece zero reference and is reset
whenever it is necessary.

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BASIC SETTING
CM78N-C02 can be configured by the user to fit to different operational modes.
The configuration is performed as follows:
Press the key F to access the configuration phase. The display will show Ch.SEt.
Digit the key sequence R – Arrow 2 - Arrow 4 – within 5 seconds. The display will
show: F:XXXXX Now you can enter the configuration code.
The configuration code is composed according to the table hereunder: each code
position corresponds to a column of the table; each option corresponds to a line of
the table. The setting is made by pressing the arrow key corresponding to the digit to
be modified until reaching the number corresponding to the required function.
F.XXXXX BASIC SET-UP
OPERATING MODE Count type Functional
Inputs Polarity Decimal Digits Input IN3 Function
0 Position visualiser Bidirectional x 4 NPN No one Count block
1 Position visualiser with
alarms
Bidirectional x 1 PNP 1 Display block
2 Absolute/relative position
visualiser with alarms
Monodirectional
up-counter
2
3 Monodirectional
down-counter
3
SETTING CONFIRMATION
After entering the required configuration code press F to confirm and access the setting of the operating functions specific for the
chosen operational mode.
SPECIFIC SETTINGS
This phase can also be accessed pressing Fand, when the display shows Ch.Set, entering the key sequence Arrow 1, Arrow 6,
Arrow 2.
The setting is made by pressing the arrow key corresponding to the digit to be modified until reaching the number corresponding to the
required function.
According to the chosen operational mode you can meet three possible situations:
OPERATIONAL MODE 0
C.XX – OPERATIONAL MODE 0 – SPECIFIC SET-UP
LOAD BY KEYBOARD LOAD BY INPUT
0 Disabled On the closure state
1 Enabled On the closure front
OPERATIONAL MODE 1
C.XXX – OPERATIONAL MODE 1 – SPECIFIC SET-UP
LOAD BY KEYBOARD RELAY OPERATION END STROKE SETTING LOAD SETTING
0 Disabled Steady outputs Free Free
1 Enabled Pulse timed outputs Under set-up key Under set-up key
2 Under constants key Under constants key
OPERATIONAL MODE 2
C.XXXX – OPERATIONAL MODE 2 – SPECIFIC SET-UP
COMPARING MODE FACTOR 2 DECIMALS RELAY OPERATION STROKE END SETTING
0 Absolute record No one Steady outputs Free
1 Relative record 1 Timed pulse outputs Under set-up key
2 2 Under constants key
3 3
SETTING CONFIRMATION
After entering the required set-up press F to confirm. If the chosen selection involves the parameters entering under SET-UP key the
parameter setting phase is accessed; otherwise you switch to the main display page.
Key Arrow 1

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OPERATIONAL MODE 0
POSITION VISUALISER
FUNCTIONS
 Multiplying factor
 Count load
 mm/inch conversion
 Display/count block
OPERATING MODE
MAIN DISPLAY PAGE
The display shows the value of the count record multiplied by the
set factor. Positive numbers are shown without sign indication,
while negative numbers are precedeed by the minus sign; values
exceeding -99999 are displayed without – sign, with the first digit
flashing.
ALARM
No alarm signal is available.
VALUE SETTING BY KEYBOARD
During the setting phase of a numerical value a dot flashes on the
right display side.
The key Rsets the value to 0.
The Arrow keys modify the value.
The minus sign is obtained by pressing the Arrow key 1 until
exceeding number 9. The max negative set is –99999.
SETTING THE LOAD VALUE
The phase is accessed by pressing the key P1: the display shows
LoAd followed by the current value. Modify the value with the
Arrow keys, then press P1 again to store the new value and
switch back to the main display page.
If no key is pressed within 5 seconds, the display switches back
to the main page and no modification is stored.
The LOAD value is stored into the count record by keyboard or at
closing of the relevant input.
LOAD ENTERING BY KEYBOARD (If enabled in the modes
set)
Pressing the key Rthe display shows LoAd. Press the key R
again to enter the value into the count record. Pressing any other
key cancels the operation.
INPUTS/OUTPUTS
The instrument is equipped with three inputs performing the
following operations:
IN1 = load (see paragraph ‘specific settings’)
IN2 = mm/inch display switch
IN3 = count block or visualisation block (see par. ‘basic settings’).
Outputs are not used in this operational mode.
LOAD BY INPUT
Closing input IN1 the LOAD value is displayed.
If the function ‘load on the closure state’ was selected, the pulses
count is blocked until input IN1 is opened again.
For selection ‘LOAD on the closure front’ the pulses count is not
affected by the input IN1 closing.
mm/inch CONVERSION
Closing inpunt IN2 the display indication is switched from mm to
inch. The ‘inch’ displayed value has one decimal digit more than
the ones set for the ‘mm’ value.
The set LOAD value is also converted automatically.
VISUALISATION/COUNT BLOCK
If the count block function was selected, the pulses count is
stopped by closing input IN3.
If the visualisation block function was selected, the display update
of the pulses count is suspended when closing input IN3.
The input pulses count goes on and the updated value is
displayed when input IN3 is opened again.
PARAMETERS SETTING
Press the key F and, when the display shows Ch.Set, digit the
key sequence P2 F P1 within 5 seconds to access the
parameters setting phase.
PARAMETERS LIST
Multiplying factor of the input pulses
After entering the costants key, the display shows FAtt. followed
by the current value of the multiplying factor of the input pulses.
The value can range between 0.01 and 9.99999.
After confiming the value the display switches back to the
main display page.

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OPERATIONAL MODE 1
POSITION VISUALISER WITH TWO SETTABLE THRESHOLDS
FUNCTIONS
 Multiplying factor
 Count load
 mm/inch conversion
 Display/count block
 2 alarm outputs
OPERATING MODE
MAIN DISPLAY PAGE
The display shows the value of the count record multiplied by the
set factor. Positive numbers are shown without sign indication,
while negative numbers are precedeed by the minus sign; values
exceeding -99999 are displayed without – sign, with the first digit
flashing.
ALARM THRESHOLDS
Two alarm thresholds, called positive and negative stroke ends,
can be set; they are enabled by comparison, respectively for ≥
and ≤value than the count record.
VALUE SETTING BY KEYBOARD
During the setting phase of a numerical value a dot flashes on the
right display side.
The key Rsets the value to 0.
The Arrow keys modify the value.
The minus sign is obtained by pressing the Arrow key 1 until
exceeding number 9. The max negative set is –99999.
SETTING THE POSITIVE STROKE END VALUE (free setting)
The phase is accessed by pressing the key P1: the display shows
FC POS followed by the current value.
Modify the value with the Arrow keys, then press P1 again to
store the new value and switch back to the main display page.
The set value is compared for ≥with the count record value to
enable or disable output 1.
SETTING THE NEGATIVE STROKE END VALUE (free setting)
The phase is accessed by pressing the key P2: the display shows
FC NEG followed by the current value.
Modify the value with the Arrow keys, then press P2 again to
store the new value and switch back to the main display page.
The set value is compared for ≤with the count record value to
enable or disable output 2.
SETTING THE LOAD VALUE (free setting)
The phase is accessed by pressing the key R: the display shows
LoAd followed by the current value. Modify the value with the
Arrow keys, then press Fto store the new value and switch back
to the main display page.
LOADING THE VALUE
LOADING by input is always enabled.
LOADING by KEYBOARD can be enabled, and can operate in
two different ways, depending whether the load setting is free or r
under key.
Free setting: after confirming the LOAD value (key F) the display
shows the flashing message LoAd. The key Rloads the value,
any other key cancels the operation.
Setting under key: pressing the key Rthe display shows the
flashing message LoAd. Pressing Ragain the value is loaded,
any other key cancels the operation.
INPUTS
The instrument is equipped with three inputs performing the
following operations:
IN1 = load
IN2 = mm/inch display switch
IN3 = count block or visualisation block
IN1: LOAD BY INPUT
Closing input IN1 the LOAD value is displayed.
If the function ‘load on the closure state’ was selected, the pulses
count is blocked until input IN1 is opened again.
IN2: mm/inch CONVERSION
Closing inpunt IN2 the display indication is switched form mm to
inch. The ‘inch’ displayed value has one decimal digit more than
the ones set for the ‘mm’ value.
The set LOAD and STROKE ENDS values are also converted
automatically.
IN3: VISUALISATION/COUNT BLOCK
If the count block function was selected, the pulses count is
stopped by closing input IN3.
If the visualisation block function was selected, the display update
of the pulses count is suspended when closing input IN3.
The input pulses count goes on and the updated value is
displayed when input IN3 is opened again.
OUTPUTS
The instrument is equipped with 2 alarm signal outputs.
OUT 1 = Positive stroke end
OUT 2 = Negative stroke end
PARAMETERS SETTING
Press the key Fand, when the display shows Ch.Set, digit the
key sequence P2 F P1 within 5 seconds to access the
parameters setting phase.
During the setting phase of a numerical value a dot flashes on the
right display side.
The key Rsets the value to 0.
The Arrow keys modify the value.
The minus sign is obtained by pressing the Arrow key 1 until
exceeding number 9. The max negative set is –99999.
Press F to confirm the set value and switch to the following
parameter.
PARAMETERS LIST
Load (setting under constants key)
The display shows LoAd followed by the current value.
The LOAD value is stored into the count record by closing input
IN1.
Output 1 Excitation Time (for selection: timed pulse outputs)
The display shows tout 1 followed by the current value of output
1 excitation time expressed in seconds.
Default value 0.3 S.
Mimimum setting 0.1 S, max setting 25.0 S.
Output 2 Excitation Time (for selection: timed pulse outputs)
The display shows tout 2 followed by the current value of output
2 excitation time expressed in seconds.
Default value 0.3 S.
Mimimum setting 0.1 S, max setting 25.0 S.
Stroke ends (setting under constants key)
The display shows FC POS. followed by the current value.
The value is compared with the count record value to enable or
disable output 1.
After confirming the positive end stroke value the display shows
FC nEg. followed by the current value.
The value is compared with the count record value to enable or
disable output 2.
Multiplying Factor of the Count Pulses
The display shows FAtt. followed by the current value of the
multiplying factor of the input pulses. The value can range
between 0.01 and 9.99999.
After confiming the value the display is switched back to the main
display page.

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OPERATIONAL MODE 2
ABSOLUTE/RELATIVE POSITION VISUALISER WITH TWO SETTABLE THRESHOLDS
FUNCTIONS
 Absolute/relative visualisation (see par.Operating Specifications)
 2 multiplying factors selectable by input (a different number of
decimals can be set for the second factor – see ‘Specific
setting’)
 Count load
 Display/count block
 2 alarm outputs
MAIN DISPLAY PAGE
The display shows the value of the count record multiplied by the
set factor. Positive numbers are shown without sign indication,
while negative numbers are precedeed by the minus sign; values
exceeding -99999 are displayed without – sign, with the first digit
flashing.
ALARM THRESHOLDS
Two alarm thresholds, called positive and negative stroke ends,
can be set; they are enabled by comparison, respectively for ≥
and ≤value than the count record.
Alarms can be enabled either in comparison with the absolute
record or with the relative record (see ‘Specific setting’).
OPERATING MODE
VALUE SETTING BY KEYBOARD
During the setting phase of a numerical value a dot flashes on the
right display side.
The key Rsets the value to 0.
The Arrow keys modify the value.
The minus sign is obtained by pressing the Arrow key 1 until
exceeding number 9. The max negative set is –99999
SETTING THE STROKE END VALUES (free setting)
The positive stroke end set phase is accessed by pressing the
key P1: the display shows FC POS followed by the current value.
The value is compared for ≥with the absolute or relative count
record value to enable or disable output 1.
Modify the value with the Arrow keys, then press P1 again to
store the new value and switch to the negative stroke end set
phase. The display shows FC NEG followed by the current value.
The value is compared for ≤with the absolute or relative count
record value to enable or disable output 2.
Modify the value with the Arrow keys, then press P1 again to
store the new value and switch back to the main display page.
VISUALISATION MODE SELECTION
Pressing P2 switches the visualisation from the ABSOLUTE
RECORD to the RELATIVE RECORD and vice-versa. A dot
flashes on the display left side as the relative record is displayed.
RELATIVE RECORD RESET
Pressing the key Rthe display shows the flashing message
rESEt. Press Ragain to reset the record or Fto leave the phase.
INPUTS
CM78N-C02 is equipped with three inputs performing the
following operations:
IN1 = absolute value loading
IN2 = multiplying factor 1-2 selection
IN3 = count block or visualisation block
IN1: ABSOLUTE VALUE LOADING
On the input IN1 closure front the LOAD value is entered into
the absolute count record.
IN2: MULTIPLYING FACTOR 1-2 SELECTION
Closing input IN2 the display indication is switched from:
Displayed RECORD = COUNT x FACTOR 1
to
Displayed RECORD = COUNT x FACTOR 2
The number of displayed decimals corresponds to the setting
‘Factor 2 decimals’ (see ‘Specific setting’). The LOAD and
STROKE ENDS values are also converted automatically.
IN3: VISUALISATION/COUNT BLOCK
If the count block function was selected, the pulses count is
stopped by closing input IN3.
If the visualisation block function was selected, the display update
of the pulses count is suspended when closing input IN3.
The input pulses count goes on and the updated value is
displayed when input IN3 is opened again.
OUTPUTS
The instrument is equipped with 2 alarm signal outputs.
OUT 1 = Positive stroke end
OUT 2 = Negative stroke end
PARAMETERS SETTING
Press the key Fand, when the display shows Ch.Set, digit the
key sequence P2 F P1 within 5 seconds to access the
parameters setting phase.
During the setting phase of a numerical value a dot flashes on the
right display side.
The key Rsets the value to 0.
The Arrow keys modify the value.
The minus sign is obtained by pressing the Arrow key 1 until
exceeding number 9. The max negative set is –99999.
Press F to confirm the set value and switch to the following
parameter.
PARAMETERS LIST
Load (setting under constants key)
The display shows LoAd followed by the current value.
The LOAD value is stored into the count record by closing input
IN1.
Output 1 Excitation Time (for selection: timed pulse outputs)
The display shows tout 1 followed by the current value of output
1 excitation time expressed in seconds.
Default value 0.3 S.
Mimimum setting 0.1 S, max setting 25.0 S.
Output 2 Excitation Time (for selection: timed pulse outputs)
The display shows tout 2 followed by the current value of output
2 excitation time expressed in seconds.
Default value 0.3 S.
Mimimum setting 0.1 S, max setting 25.0 S.
Stroke ends (setting under constants key)
The display shows FC POS. followed by the current value.
The value is compared with the count record value to enable or
disable output 1.
After confirming the positive end stroke value the display shows
FC nEg. followed by the current value.
The value is compared with the count record value to enable or
disable output 2.
Multiplying Factors 1 – 2
The display shows FAtt.n followed by the current value. Factor
1 is used when IN2 is open, Factor 2 is used when IN2 is closed.
After confirming the second value the display switches to the
main page.
Factors range values: 0.01000/9.99999.
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