Lika LD25 Series User manual

LD25x
User's manual
LD250 – LD251 – LD252 - LD253
Description
LD25x is a SSI display for connecting single-turn or multi-turn SSI encoders. The
user's interface is a multi-function key oard fitted with 3 keys and a 7-segment
and 6-digit LED display.
Model LD250 is a SSI display only version; model LD251 provides an analogue
output in addition; model LD252 further offers two presets and two switching
outputs; finally model LD253 is equipped with a RS-232/RS-485 serial interface
for connection with a PC.
Table of contents
1 - Safety summary
2 - Identification
3 - Mounting instructions
4 - Electrical connections
5 - Operating the front keys
6 - Operator menu
7 - Set-up procedure
8 - Hints for application
9 - Special functions
10 - Parameters list
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1 Safety summary
1 1 Safety
•Always adhere to the professional safety and accident prevention
regulations applica le to your country during device installation and
operation;
•installation and maintenance operations have to e carried out y qualified
personnel only, with power supply disconnected and stationary mechanical
parts;
•device must e used only for the purpose appropriate to its design: use for
purposes other than those for which it has een designed could result in
serious personal and/or the environment damage;
•high current, voltage and moving mechanical parts can cause serious or
fatal injury;
•warning ! Do not use in explosive or flamma le areas;
•failure to comply with these precautions or with specific warnings
elsewhere in this manual violates safety standards of design, manufacture,
and intended use of the equipment;
•Lika Electronic s.r.l. assumes no lia ility for the customer's failure to comply
with these requirements.
1 2 Electrical safety
•Turn OFF power supply efore connecting the device;
•connect according to explanation in section ”4 - Electrical connections”;
•in compliance with 2004/108/EC norm on electromagnetic
compati ility, following precautions must e taken:
- efore handling and installing the equipment, discharge
electrical charge from your ody and tools which may come in touch with
the device;
- power supply must e sta ilized without noise; install EMC filters on
device power supply if needed;
- always use shielded ca les (twisted pair ca les whenever possi le);
- avoid ca les runs longer than necessary;
- avoid running the signal ca le near high voltage power ca les;
- mount the device as far as possi le from any capacitive or inductive noise
source; shield the device from noise source if needed;
- minimize noise y connecting the unit to ground (GND). Make sure that
ground (GND) is not affected y noise. The connection point to ground can
e situated oth on the device side and on user’s side. The est solution to
minimize the interference must e carried out y the user.
1 3 Mechanical safety
•Install the device following strictly the information in the section “3 -
Mounting instructions”;
•do not disassem le the unit;
•do not tool the unit;
•delicate electronic equipment: handle with care; do not su ject the device
and the shaft to knocks or shocks;
•respect the environmental characteristics of the device.
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LD25x
2 Identification
Device can e identified through the ordering code and the serial number
printed on the la el applied to its ody. Information is listed in the delivery
document too. Please always quote the ordering code and the serial num er
when reaching Lika Electronic s.r.l. for purchasing spare parts or needing
assistance. For any information on the technical characteristics of the product,
refer to the technical catalogue.
3 Mounting instructions
WARNING
Mount the unit with power supply disconnected.
Mount the display into the provided cut-out (approx. 91 x 44 mm) without
panel clips.
Install panel clips on the display housing and screw until fixed.
96,0 (3.780’’)
110,0 (4.331’’)
44,0 (1.732)
10,0
(.394)
8,0
(.315)
91,0 (3.583)
9,0 (.345) 129,0 (5.079)
140,5 (5.531)
48,0 (1.890)
Panel cut out: 91 x 44 mm (3 583 x 1 732’’)
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4 Electrical connections
WARNING
Turn OFF the power supply efore connecting the device.
LD250
Display unit only
All connections are as
shown elow, except for
terminals 8, 9 and 10 which
are not connected.
LD251
Display unit with
analogue output
GND 17-30 VCD IN
1 2 3 4 5 6 7 8 9 10
Input A Input B GND +24 VDC OT
GND analogue
+/- 10 V analogue
0/4-20 mA analogue
PE
GND 230VAC 115 VAC 0 VAC
CLK CLK DAT DAT
1 2 3 4
Input C (Reset)
LD252
Display unit with 2
presets and transistor
outputs
GND 17-30 VCD IN
1 2 3 4 5 6 7 8 9 10
Input A Input B Input C (Reset) GND +24 VDC OT
COM+ OT 1 OT 2
PE
GND 230VAC 115 VAC 0 VAC
CLK CLK DAT DAT
1 2 3 4
LD253
Display unit with serial
interface
GND
17-30 VCD IN
1 2 3 4 5 6 7 8 9 10
Input A (transm.)
Input B Input C (Reset) GND +24 VDC OT
TxD / B (-)
PE
GND 230VAC 115 VAC 0 VAC
CLK CLK DAT DAT
1 2 3 4
GND
RxD / A (+)
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4 1 Power supply
The unit accepts DC power supply from 17 V to 30 V when using terminals 1
and 2. The consumption depends on the level of the supply voltage (typically
130mA at 30V or 190mA at 17V, plus current taken from aux. output).
For AC supply the terminals 0 VAC, 115 VAC or 230 VAC can e used. The total
AC power is 7.5 VA.
The pictures in the previous page show a dotted line for grounding to PE. This
connection is not really necessary, neither for safety nor for EMC. However, for
specific applications, it may e useful to ground the common potential of all
signal lines.
NOTE
When using this earthing option, please note that:
1. all terminals and potentials marked “GND“ will e earthed;
2. you should avoid multiple earthing, e.g. when you use a DC power
supply where the Minus is already connected to earth etc.
4 2 Auxiliary voltage output
Terminal 7 provides a 24 VDC / 120 mA max. auxiliary output for supply of
sensors and encoders.
4 3 Control inputs A, B and C
In LD253 model input A is used to activate a serial transmission (rising edge, see
section “7.5.2 Printer-Mode” on page 26). Input B is not used.
Input C operates as a Set / Reset input (static function, active "HIGH", see
section “8.3 Scaling of the display” on page 29).
In the asic set-up menu, the inputs can e configured to PNP (signal must
switch to +) or to NPN (signal must switch to -). This configuration is valid for
all three inputs at the same time.
The factory setting is always PNP.
NOTE
1. When NPN setting is used, please e aware that open NPN inputs will
always represent a logical HIGH state. Consequently, Input C has to e
connected to GND externally to allow normal operation. If unconnected,
the unit would e kept in a continuous Reset state. In model LD253, also
Input A must e connected to GND and opening this connection will
generate a rising edge to start a serial transmission.
2. When you use 2-wire NAMUR type sensors, please select NPN, connect
the negative wire of the sensor to GND and the positive wire to the
corresponding input.
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Typical input circuit of control input:
PNP
4,7k
GND GND
+24V int.
Input
4,7k
GND
Input
+24V int.
NPN
The minimum pulse duration on the Reset input (C) must e 5 msec.
4 4 Adjustable analogue output (LD251 model only)
A voltage output is availa le, operating in a range of 0 ... +10 V or –10 V ... +10
V according to setting. At the same time, a current output 0/4 – 20 mA is
availa le. Both outputs refer to the GND potential and the polarity changes with
the sign in the display. The outputs are proportional to the display value and
provide a 14- it resolution.
The maximum current for the voltage output is 2 mA and the load on the
current output can vary etween 0 and max. 300 ohms.
The response time of the analogue output at each change of the encoder
position is approx. 7 msec.
4 5 Optocoupler (transistor) outputs (LD252 model only)
Outputs provide programma le switching characteristics and are potential-free.
Please connect terminal 8 (COM+) to the positive potential of the voltage you
want to switch (range 5V....35V). You must not exceed the maximum output
current of 150 mA. If you switch inductive loads, please provide filtering of the
coil y means of an external diode.
The optocoupler outputs provide a response time of approx. 5 msec with
resistive load.
Opto Opto 33 R
(8)
(9)
(10)
Com+ (5 ... 35 V)
Output 1 (max. 150 mA)
Output 2 (max. 150 mA)
33 R
Preset 2 Preset 1
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4 6 Serial RS-232 / RS-485 interface (LD253 model only)
Ex factory the unit is set to RS-232 communication. This setting can e changed
to RS-485 (2-wire) y means of an internal DIL switch. To access the DIL switch,
you must remove the screw terminal connectors and the ack panel. Then pull
the oard to the rear to remove the PCB from its housing.
ON DIP
DIL-S itch
Removal of the back panel Location of the DIL switch
RS-232
ON
8
9
10
RxD
TxD
GND
RS-485
ON
8
9
10
A (+)
B (-)
GND
WARNING
1. Never set DIL switch positions 1 and 2 or DIL switch positions 3 and 4 to
ON at the same time!
2. After setting the switch, shift the print carefully ack to its housing, in
order to avoid damaging the front pins for connection with the front
keypad plate.
Connection of the RS-232 interface
Connection of the RS-485 interface
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5 Operating the front keys
For set-up and other operations the unit is fitted with three front keys which
will e denominated as follows in the next pages:
ENTER
(Input)
SET
(Setting)
CMD
(Command)
The functions of the keys are depending on the actual operating state of the
unit.
The following three operating states apply:
•Normal display state (see section “5.1 Normal display state” on page 8)
•Set-up state (see section “5.2 Selection and setting of parameters” on
page 9)
- Basic set-up (see section “7.1 Basic settings” on page 14)
- Operational parameters set-up (see section “7.2 Operational
parameters” on page 16)
•Teach operation (see section “5.3 Teach operation” on page 10)
5 1 Normal display state
NOTE
You can only change over to other operation states while the unit is in the
normal display state.
Change over to Key operation
Basic set-up Keep ENTER and SET down simultaneously for 3 seconds
Operational
parameter set-up Keep ENTER down for 3 seconds
Teach operation Keep CMD down for 3 seconds
The CMD key is only used to execute the Teach procedure with linearisation. For
more details please refer to sections “9.1 Linearisation“ and “9.2 Manual input or
„teaching“ of the interpolation points” on page 35.
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5 2 Selection and setting of parameters
5 2 1 Selecting a parameter
The ENTER key will scroll through the menu. The SET key allows to select the
corresponding item and change the setting or the numeric value. After this, the
selection can e saved y pressing the ENTER key again, which automatically
changes over to the next menu item.
5 2 2 Changing parameter settings
With numerical entries, at first the lowest digit will link. When keeping the SET
key continuously down, the highlighted digit will scroll in a continuous loop
from 0 to 9 and again from 0 to 9; and so on. After releasing the SET key, the
actual value will remain and the next digit will e highlighted ( link). This
procedure allows setting all digits to the desired values. After the most
significant digit has een set, the low order digit will link again and you can
make corrections if necessary.
With signed parameters, the high order digit will scroll from “0” to "9" (positive)
followed y “-“ and "-1" (negative).
5 2 3 Saving settings
To save the actual setting, press the ENTER key, which will also automatically
scroll forward the menu.
NOTE
At any time the unit changes from programming mode to normal display
operation, when you keep the ENTER key down again for 3 seconds at least.
5 2 4 Time-out function
A “time-out” function will automatically terminate every menu level, when for a
reak period of 10 seconds no key has een pressed. In this case, all changes
which have not een confirmed y ENTER yet would remain unconsidered.
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5 3 Teach operation
NOTE
The time-out function remains disa led during all Teach operations.
Key Function
ENTER will terminate or a ort any Teach operation in
progress
SET function is fully similar to normal set-up operation
CMD will save the display value in the register and
change over to the next interpolation point
For further details on the Teach procedure see section “9.2 Manual input or
„teaching“ of the interpolation points” on page 37.
5 4 Setting all registers to “Default“ values
At any time you can return all settings to the factory default values.
WARNING
This action will reset all parameters to factory default values and your own
settings will e lost. You will have to repeat your individual set-up procedure.
Factory default values are shown in the su sequent parameter ta les (see
section “Parameters list” on page 39).
To reset the unit to default values:
•switch power off;
•press the ENTER key on the front;
•keep ENTER down while you power up again.
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5 5 Code locking of the keypad
When the code locking of the keypad has een switched on (see on page 15),
any key access first results as follows:
------
To access the menu you must press the following key sequence:
within 10 seconds, otherwise the unit will automatically return to the normal
display mode.
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6 Operator menu
The menu provides one section with “Basic Parameters” (see section “7.1 Basic
settings” on page 14)and another section with “Operational Parameters” (see
section “7.2 Operational parameters” on page 16). On the display you will only
find those parameters which have een ena led y asic settings. E.g. when the
Linearisation function has een disa led in the asic set-up, the associated
linearisation parameters will also not appear in the parameter menu.
All parameters, as good as possi le, are designated y text fragments. Even
though the possi ilities of forming texts are very limited with a 7-segment
display, this method has proved to e most suita le for simplification of the
programming procedure.
The su sequent ta le shows the general structure of the menu.
Detailed descriptions of all parameters will follow in section “7 - Set-up
procedure“ on page 14.
6 1 Overview of basic parameters
LD250 LD251 LD252 LD253
SSI-Mode SSI-Mode SSI-Mode SSI-Mode
SSI-Bits SSI-Bits SSI-Bits SSI-Bits
SSI-Format SSI-Format SSI-Format SSI-Format
SSI-Baud Rate SSI-Baud Rate SSI-Baud Rate SSI-Baud Rate
SSI-Test SSI-Test SSI-Test SSI-Test
Characteristics Characteristics Characteristics Characteristics
Brightness Brightness Brightness Brightness
Code Code Code Code
Linearisation mode Linearisation mode Linearisation mode Linearisation mode
Analogue
characteristics
Preselection mode 1 Serial unit num er
Analogue offset Preselection mode 2 Serial format
Analogue gain Hysteresis 1 Serial aud rate
Hysteresis 2
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6 2 Overview of operational parameters
LD250 LD251 LD252 LD253
Preselection 1
Preselection 2
M-Factor M-Factor M-Factor M-Factor
D-Factor D-Factor D-Factor D-Factor
P-Factor P-Factor P-Factor P-Factor
Decimal point Decimal point Decimal point Decimal point
Display Display Display Display
Hi_Bit (MSB) Hi_Bit (MSB) Hi_Bit (MSB) Hi_Bit (MSB)
Lo_Bit (LSB) Lo_Bit (LSB) Lo_Bit (LSB) Lo_Bit (LSB)
Direction Direction Direction Direction
Error Error Error Error
Error_Polarity Error_Polarity Error_Polarity Error_Polarity
Round Loop Round Loop Round Loop Round Loop
Time Time Time Time
Reset Reset Reset Reset
Zero Position Zero Position Zero Position Zero Position
Analogue Begin Ser_Timer
Analogue End Ser_Mode
Ser_Value
P01_X * P01_X * P01_X * P01_X *
P01_Y* P01_Y* P01_Y* P01_Y*
... ... ... ...
P16_X * P16_X * P16_X * P16_X *
P16_Y * P16_Y * P16_Y * P16_Y *
* This only appears if the linearisation function has een ena led in the Basic menu.
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7 Set-up procedure
For etter understanding the following sections “7.1 Basic settings” and “7.2
Operational parameters” explain settings related to the display only model
(LD250). Model-specific settings for analogue output model (LD251),
Preselections model (LD252) and Serial Link model (LD253) will e explained
separately under sections from “7.3 Model LD251: additional settings for the
analogue output“ to “7.5 Model LD253: additional settings for the serial
interface“.
7 1 Basic settings
Customarily these settings have to e carried out one time only upon the very
first use of the unit. The asic set-up selects the desired operation mode of the
unit, the input characteristics PNP/NPN and the desired rightness of the LED
display.
NOTE
To access the Basic Set-up press the ENTER and SET keys simultaneously for at
least 3 seconds.
Menu Setting range Default
modE
SSI-Mode
Setting of Master mode or Slave mode.
For details see section “8.1 Master and Slave
Operation“ on page 27.
MASte
SLA mASte
bitS
SSI-Bits
Bit length of the SSI string.
For more details see section “8.2 Evaluation of
encoder its“ on page 28.
08
...
32
25
Form SSI-Format
Setting of the SSI code (Binary or Gray).
bin
...
GrAybin
bAUd SSI-Baud Rate 0.1 … 1000.9 kHz 100 0 kHz
tESt
SSI Test
SSI Self test functions. For more details see section
“8.5 Testing functions” on page 34.
Cd 11
etc.
ChAr Characteristics *
Switching characteristics of the Reset input. PnP
NPN, switch to “-“ * nPn
PNP, switch to “+“ PnP
briGht Brightness
Brightness of the 7-segment LED display.
20%, 40%, 60%,
80%, 100% 100%
* Please follow the hints given in section “4.3 Control inputs A, B and C” on page 5 carefully.
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Menu Setting range Default
CodE Keypad protection code (for more details see
section “5.5 Code locking of the keypad” on page 11). no
Keypad ena led continuously. no
Keypad locked for any access. All
Keypad locked, except for access to preselections 1
and 2 (LD252 only, see section “7.4 Model LD252:
additional settings for preselections and switching
outputs” on page 21).
P_frEE
LinEAr
Linearisation mode *
For details please refer to sections “9.1 Linearisation“
and “9.2 Manual input or „teaching“ of the
interpolation points“ on page 35.
no
The linearisation is switched off. * no
Linearisation settings for the positive range only
(negative values will appear as a mirror). 1- UA
Linearisation over the full numeric range. 4- UA
* If “no” is set next to this item, the menu will not display any further linearization parameter.
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7 2 Operational parameters
Menu Setting Range Default
m FAc
M-Factor *
Multiplying factor for the SSI value
(after consideration of possi le it lanking).
-9.999 … 9.999 1 000
d FAc
D-Factor *
Dividing factor for the SSI value
(after consideration of possi le it lanking).
0.001 … 9.999 1 000
p FAc
P-Factor *
This signed value will e added to the SSI result
(after consideration of possi le it lanking).
-199999 …
999999 0
dPoiA Decimal Point
Setting according to the decimal formats shown in
the display.
000000
00000.0
...
0.00000
00000 0
diSPLA
Display
Display mode of the unit:
norm: regular scaling of the display;
359 59: angular display format 359° 59' with use of
the “Round-Loop” function. For more details see
section “8.4.2 “Round-Loop” function” on page 32.
norm
359.59 Norm
Hi bit
Hi Bit **
“Bit Blanking” function: defines the highest it for
evaluation. To evaluate all encoder its this
parameter has to e set to the total num er of its
according to setting. For more details see section
“8.2 Evaluation of encoder its” on page 28.
1 … 32 25
Lo bit
Lo Bit **
“Bit Blanking” function: defines the lowest it for
evaluation. To evaluate all encoder its this
parameter has to e set to "01". For more details see
section “8.2 Evaluation of encoder its” on page 28.
1 … 31 1
* Scaling details are explained in section “8.3 Scaling of the display” on page 29.
** For more details a out “Bit Blanking” function see section “8.2 Evaluation of encoder its” on
page 28.
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Menu Setting Range Default
dir Direction
Parameter to negate the SSI value, resulting in a
reversal of the direction of the encoder count.
riGht: increasing values with forward motion.
LEFt: decreasing values with forward motion.
RiGht
LEFt riGht
Error Error (please refer to section “8.6 Error messages”
on page 34).
Defines the control of presence of an encoder and
the location of the error it in case of error.
00: No error it availa le
Control of presence of an encoder is off
01: No error it availa le
Control of presence of an encoder is on
>01: Location of the error it
Control of presence of an encoder is on
0 ... 32 0
ErrorP Error-Polarity *
Defines the polarity of the error it in case of error.
0: Error Bit is Low in case of error
1: Error it is High in case of error
0
10
When an error occurs, Err-b message is invoked to appear on the display (see
section “8.6 Error messages” on page 34).
The same function can also e used to monitor the Power Failure Bit of an encoder
(mostly called “PFB“).
r-LooP Round-Loop
Defines the num er of encoder steps per
revolution when using the “Round-Loop” function
(for further information see section “8.4.2
“Round-Loop” function” on page 32).
0: Normal display of the encoder data, no
“Round-Loop” function.
>0: Num er of steps per “Round-Loop” cycle.
0 ... 999999 0
timE Time
Sets the update cycle of the display (and of the
analogue output or the switching outputs where
applica le). The fastest possi le update time is 3
msec. or the time period corresponding to one
telegram with 4 pause clocks. With “Slave”
operation the next update will occur when the unit
synchronizes again to the Master pause following
to the expiration of the update time.
0.000 ... 1.009
sec 0 01 sec
*) Please o serve that parameter p FAc will cause an additional displacement of the zero
position.
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Menu Setting Range Default
FE rES Reset
A Reset command is availa le to store the actual
SSI position to next register 0-PoS. As a result, the
display value will ecome zero at the actual encoder
position and all further operation will refer to this
new datum point. The zero position remains
memorized also after power-down.
no: Reset function disa led
Front: Reset operation performed y means of the
front SET key
E_tErn: Reset operation performed y means of the
remote Reset input
FR u E: Reset operation performed y means of
oth key and remote input
No
Front
E_tErn
Fr u E
no
0-PoS Zero Position *
Defines the zero position of the display. When you
set this parameter to e.g. "1024", the unit will
display zero when the encoder position is 1024.
0-PoS can e set directly via keypad or y means
of an external Reset command.
-199999
...
999999
0
P01_X Linearisation point 1_X **
X value of the first interpolation point.
-199999 ...
999999 999999
P01_Y Linearisation point 1_Y **
Y value of the first interpolation point.
-199999 ...
999999 999999
…
P16_X Linearisation point 16_X **
X value of the 16. interpolation point.
-199999 ...
999999 999999
P16_Y Linearisation point 16_Y **
Y value of the 16. interpolation point.
-199999 ...
999999 999999
*) Please o serve that parameter p FAc will cause an additional displacement of the zero
position.
**) Parameters P01_X to P16_Y appear only when the linearisation has een ena led in the
asic menu.
For more details a out linearisation please refer to section “9.1 Linearisation“ on
page 35.
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7 3 Model LD251: additional settings for the analogue output
The Basic menu provides the following additional settings:
Menu Setting Range Default
A-ChAr Analogue characteristics
Select one of the following options: -0_10
+/-10 V ( ipolar) -10_10
0-10 V (positive output only) 0_10
4-20 mA current output 4_20
0-20 mA current output 0_20
With setting +/-10 Volts the polarity of the output
voltage will follow the sign in the display.
OFFSEt Analogue Offset
Set this parameter to 0 when you expect your
analogue signal to start with 0 V (or 0 mA / 4 mA
respectively). When another zero definition is
desired it can e set via this parameter. Setting of
e.g. “5.000” will already produce 5 volts with the
output in zero state.
-9,999 ... +9,999 0
GAin Analogue Gain
It is meant to set the analogue output swing.
Setting 10.00 will allow full swing of 10 V or 20
mA, setting 8.00 will reduce the swing to 8 V or 16
mA.
00,00 ... 99,99 10
The following Operational parameters provide scaling of the analogue output:
Menu Setting Range Default
AnAbEG Analogue-Begin
Start value of the analogue conversion range.
-199999 ...
999999 0
AnAEnd Analogue-End
End value of the analogue conversion range.
-199999 ...
999999 10000
By means of the two a ove parameters any window of the whole display range
can e mapped onto the analogue output.
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The su sequent example shows how to convert the display range from 1400 to
2000 into an analogue signal of 2 - 10 volts.
2
4
6
8
10
1000 2000 3000 4000 5000
SSI Display Value
Volts Analogue Output
A-ChAr = 0 - 10 V AnAbEG = 1400
OFFSEt = 2 000 AnAEnd = 2000
GAin = 8 00
NOTE
All settings refer to the scaled values which are shown in the display of the unit
and not to the original SSI encoder data.
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