Synectic Electronics SY035 User manual

SY035 Weight Indicator
User instructions
Rev. Sept 2013 Relates to firmware version 3.15

CONTENTS
1 Specification
2 Operation
2.1 Tare options
3 Configuration
3.1 Calibration
3.2 Filter
3.3 Least significant digit
3. Peak hold
3.5 Relays
RS232 option
.1 Baud rate
.1a RS 85 address
.2 Remote display
.3 Printer
. Remote commands
5 Analogue output option
5.1 -20mA calibration
5.2 Voltage calibration
6 Connections

1.0 Specification
Display 5 digit LED, 10mm character height. Programmable for 0, 1, 2 or 3 decimal
points. Range +99999 / -9999 Least significant digit can be set to count in steps
of 1,2,5 or 10
Load cell input Direct connection of up to x 350R load cells. An internal amplifier feeds this
signal into a 2 bit ADC which takes up to 120 readings/sec.
Calibration Simple auto calibration facility using a known weight. Settings stored on non-
volatile memory.
Relays 2 relays rated 1A, 120VAC/2 VDC. Can be configured to latch. Relay status
indicators on front panel. Where relays are connected to a contactor or another
relay, the coil of the contactor/relay should have a suppressor fitted.
Analogue out Set as 0-5V, 0-10V, -20mA, 0-20mA or 0-2 mA. Resolution16 bits
Comms. RS232. Baud rates 2 00, 9600, 38k & 115k2 selectable. Format is 8 data bits, 1
stop bit and no parity. Can be linked to a printer or a remote display. A ticket
printout can be produced including a title, reference number and reading with
units. With the real time clock option the ticket can also include time & date.
Because the functions are built in, any standard printer can be used. An RS 85
option is also available for use with an SY 85 adaptor.
Power AC version
90 - 26 V AC 7 - 63Hz
DC version
7 - 30V DC. Consumption < 5W.
Case 72mm square DIN 3700 panel mounting. Black glass filled Noryl. Depth behind
panel - 86mm (inc. terminals).
Overall size 72 x 72 x 93mm.
E.M.C. Tested to BS EN 61000- -21:2011 for emissions & immunity.

2 Operation
The display can show live readings or can be set to peak hold mode (see 3. ) which allows peak and
trough values to be viewed.
5 digit LED display
Setpoint relay status
indicators
button keypad
This button is used to switch the instrument to configuration mode.
The TARE button is used in configuration mode to increment digit values and for
navigation.
In normal operation it is used to tare(zero) the display.
See 2.1 Tare options for more detail. In HOLD mode pressing the button shows the trough
(min) value
The RESET button is used in configuration mode to decrement digit values and for
navigation.
In normal operation it resets latched relays (see 3.5)
In HOLD mode it resets peak/trough measurements.
This button is used to view/edit setpoint relay trip levels. It can also be used to send
information to a printer if PROG is pressed before it is released (see .3).
2.1 Tare Options
The tare button can be used to tare (zero) the display. An external normally open push button switch
can be connected to the rear panel TARE terminals to perform the same function. The single button
press performs a temporary tare. When the instrument is turned off, then back on, the tare returns to
its original stored value.
To change the stored tare value, in case for example the load cell zero has drifted, pressing TARE &
PROG will take a reading and save it as the stored tare.
Will be displayed to indicate that the tare value has been stored.
In some cases it can be useful to be able to revert to the stored tare without having to turn the
instrument off and on. For example, if a number of ingredients are being added to a vessel, such as
10kg, 25kg & 15kg of three different ingredients. Ingredient 1 could be added until the display showed
10kg. The tare is then pressed to zero the display. Ingredient 2 is added until 25kg is shown. Tare is
again pressed and ingredient 3 is added until 15kg is shown. The stored tare value can then be
restored by pressing TARE & RESET
will be shown briefly and then the total vessel contents of 50kg will be indicated.
TARE
GroSS

3 Configuration
3.1 Load cell calibration
Press then PROG button then press 5 or 6 until CAL is displayed. Press the 4 key
to enter the calibration mode. The instrument can be calibrated to the load cells by
adding a known weight. Before adding a known weight, make sure you tare the instrument
before entering calibration mode.
Before changing any calibration values a PIN number has to be entered. This is not
meant to prevent access, but to prevent accidental changes being made. Without
pressing any further key, the display will change to show
after 1 second. Use the 5 6 & 4 keys until the
display shows , then press PROG.
The instrument contains a non-resettable counter which is incremented each time the
calibration is altered. To use this feature, make a note of the value on the calibration certificate. When
the unit is next calibrated the value can be checked to determine if the calibration has been altered in
the interim. To view the counter press the 4 key, then press PROG to return here.
Press the 5or 6 keys to move on to the next step.
n indicates the number of decimal places to be displayed. To change press the 4 key,
then the 5 6 keys to select the value in the range 0 – 3. When correct press PROG to return here.
Note: The decimal places value does not affect the scaling factor. If the unit was already scaled for
100.00 full scale, changing dp from 2 to 1 would leave the full scale as 1000.0
Press the 5or 6 keys to move on to the next step.
Calibration by adding a known load. The unit should already have been tared, without the known
load, before entering calibration mode. Press the 4 key, the display will show 5 hyphens with the
decimal place set according to the dp value. Use the 5 6 & 4 keys to set the display to equal the
added load value. When correct press PROG. If a problem occurs, the screen will show Err. This
usually indicates a problem with the load cell connections.
Press the 5or 6 keys to move on to the next step.
Calibration by scaling factor. A six digit scaling factor defines the displayed values. Press the 4 key,
the display will show the current value
The value is up to 99.9999, nn.nnn refers to the 1st 5 digits. Use the 5 6 & 4 keys to
adjust the value. Pressing the 4 key on the 5th digit will scroll the display to reveal the 6th digit.
Adjusting the scaling factor can be the simplest way of making fine adjustment. It is also useful to
make a note of the value after a calibration by known load.
Pressing the 5 6 keys will cycle through the calibration functions. Press PROG to exit.
3.2 Filter settings
Press the PROG button then press 5 or 6 until FIL is displayed. Press the 4 key to
indicate the current setting. n is a value between 0 and 9 indicating the level of filtering, 9 being
highest. The reading update rates depend on whether the remote display output is
enabled.
CAL
Pin
----- 12345
nrC
DP n
LOAd
FIL
FIL n
SCALE
nn.nnn

Filter Rates are:
Filter Rate(RD 0ff) Rate(RD on) Notes
0 19msec 26msec 25dB rejection @ 60Hz
1 19msec 26msec 25dB rejection @ 50Hz
2 30msec 31msec
3 50msec 51msec 80dB rejection @ 60Hz
61msec 62msec 65dB reject @ 50 & 60Hz
5 62msec 63msec 80dB rejection @ 50Hz
6 105msec 106msec 67dB reject @ 50 & 60Hz
7 21msec 22msec
8 8 2msec 8 3msec
9 1.7sec 1.7sec
The best setting depends upon the application. For example, to capture fast peaks 0 or 1 would be
best, a fast bag filler might be best set to filter , but a tank content indicator would be best on filter 9.
Use the 5 6 keys to change the filter value. When correct press PROG.
3.3 Least significant digit count
Press the PROG button then press 5 or 6 until lsd is displayed. Press the 4 key to
indicate the current setting. The value n indicates the least significant digit increments. This can be
1's, 2's, 5's or 10's. This feature is used where the accuracy or resolution of the load
cells makes the display appear unstable and does not justify counting the least
significant digits in 1's.
Use the 5 6 keys to change the value. When correct press PROG.
3. Hold mode
Press the PROG button then press 5 or 6 until HOLD is displayed. Press the 4 key to
indicate state of peak hold mode, on or off. When hold mode is on, the instrument
will measure peaks and troughs of the measured input. The display will show the c
current peak value. Holding in the 5 key will show the trough (minimum) value.
Pressing the RESET key will clear the current values.
Use the 5 6 keys to toggle between the states. When correct press PROG.
3.5 Setpoint relays operating mode
Press the PROG button then press 5 or 6 until RELAY is displayed. Press the 4
key to indicate state of relay operating mode, latch or free. In latching mode, once a
relay is energised, it will stay on until reset. In free mode the relay will be
energised only whilst the setpoint value is exceeded. If both setpoint relays are latched,
press RESET to clear relay one then press RESET again to clear relay two. If only one relay
is latched, pressing RESET will clear it.
Use the 5 6 keys to toggle between the states. When correct press PROG.
RS232 option
.1 Baud rate
Press the PROG button then press 5 or 6 until BAUD is displayed.
Press the 4 key to indicate the current value. Baud rates available are: 115200,
38 00, 9600 and 2 00. Use the 5 6keys until the required value is shown. Press PROG to save
and exit.
.1a RS 85 address
If the instrument has been supplied for use with an RS 85 adaptor, such as the SY 85,
it requires a device address to be identifiable on the RS 85 network. The current
address is shown. To be distinguished as an address, the MSB of the transmitted byte is 1. If the
address was set as 001, the device would be accessed by transmitting $81. Use the 5 6 & 4 keys
to adjust the value.
lsd
lsd n
Hold
On
OFF
rELAY
LAtCH
FrEE
AUd
dAnnn

.2 Remote Display
When the RS232 interface is fitted the option is available to connect a remote display,
such as a unit from the SY033 range. Press the 4 key to indicate state, on or off.
With remote display on, anything shown on the LED display, will also be shown on the
remote display. The information is sent to the display as an ASCII string terminated in
Carriage Return. Use the 5 6 keys to toggle between the states. When correct press
PROG.
.3 Printer
This function is available when the RS232 option is fitted. It allows a displayed value to be sent to a
printer together with an incrementing reference number. The printout also has an 8 character label
following the displayed reading which can be used to define units. A text heading can also be
included as well as a time/date stamp. To set up these features press the PROG button then
press 5 or 6 until Print is displayed.
Press the 4 key to show rEF. This is a reference number which increments each time
the displayed value is printed. To view the current value press the 4 key. To change it
press the 4 key again. Use the 5 6 & 4 keys to set the value then press PROG.
TYPE indicates the type of printout required. Press the 4 key, then the 5 6 keys to
select the type required. Type L would print a log in the form of the reference, the
reading and the text label,
e.g. Ref:12345 25.62 Tonne
Type HL would print a text header as well as the log.
e.g. Acme Trading Co. Ltd.
Ref:12345 25.62 Tonne
Type Ldt would print the log and a date/time stamp.
e.g Ref:12345 25.62 Tonne
25/09/07 15:22:30
Type HLdt would print the heading, the log and the date/time stamp.
e.g. Acme Trading Co. Ltd.
Ref:12345 25.62 Tonne
25/09/07 15:22:30
When correct press PROG.
FEED defines the number of line feeds sent to the printer after text. The number
required will vary depending on the type of printer. Press the 4 key to indicate the
current setting. The value n defines the following values:
n Result
0 - 9 0 - 9 Line feeds
A 10 line feeds
b 11 " "
C 12 " "
d 13 " "
E 1 " "
F 1 Form Feed (special case)
When correct press PROG.
rdisp
On
OFF
Print
rEF
tYPE
L
HL
Ldt
HLdt
FEEd
LF n

. RS232/ 85 commands
For the RS 85 version, all commands are preceded by the device address. If the address matches, a
carriage return is sent.
Command Description Response
@ Read Unit ID Model number, Firmware version and serial number.
Eg. SY035,V3.0, 123 cr
*H Programme heading A heading of up to 6 characters can be programmed to appear on the printout
Follow the *H command by the required message, terminated by carriage return if
less than 6 characters. The header is then reported back for confirmation.
*R Read display Reads whatever is displayed.
*TC Calibrate clock The built in clock can be speeded up or slowed down to improve accuracy. The
range of values is +/- 31. Each positive step increases the clock speed by
.068ppm, each negative step reduces it by 2.03 ppm. *TCF will put the clock
into frequency test mode and report the current calibration value. To enter a
new value send *TC+nn or *TC-nn where nn is a 2 digit number in the range
+/-31
*TR Read time Reports the current time & date in the form:YY/MM/DD hh:mm:ss(cr)
*TS Set time Set the clock to a new time and date. Enter in the form: *TSYYMMDDhhmmss
*U Programme units A label of up to 8 characters can be programmed to appear on the printout
following the displayed value. Follow the *U command by the required label,
terminated by carriage return if less than 8 characters. The label is then reported
back for confirmation.
5 Analogue output option
The analogue output, voltage or current, is proportional
to the indicated value. Fsout refers to the indicated value which results in a full scale
analogue value. eg. If the analogue output is 0-10V and the full scale value is set to 50.00, readings
of 50 or higher would give an output of 10V. Readings of 0 or less would give 0V out (Actual minimum
voltage out is typically 0.02V). To view the current full scale value press the 4 key. To change it press
the 4 key again. Use the 5 6 & 4 keys to set the value then press PROG. For current output see
5.1, for voltage 5.2
5.1 -20mA calibration
A mA output signal is generated. If necessary adjust the ZERO trimmer. Press 5or6
tto move on or PROG to return to step 5.
5.11
A 20mA output is generated. If necessary adjust the SPAN trimmer. Press 5or6 t to
repeat step 5.1 or PROG to return to step 5.
5.2 Voltage calibration
A 0V output is generated. No zero trim is required with the voltage out option. Check that
it is 0.025V or less. Press 5or6 t to move on or PROG to return to step 5.
5.21
A full scale output voltage is generated. This can be adjusted using the SPAN trimmer to
5V, 10V or any value between as required. Press 5or6 t to repeat step 5.1 or PROG
to return to step 5.
FSout
AdJ 4
AdJ20
SPAn
AdJ

6 Connections
Power in
AC DC
N -ve
Setpoint
relay 1 E
L +ve
Setpoint
relay 2
Fuse
Analogue
output
adjustments
RS232 Load cell input
Remote Tare AC Power input
Normally open contact Live to L/+, Earth to E , Neutral to N/-terminals.
Link to tare off (zero) Voltage range 95 to 26 V
displayed reading. Frequency 7 to 63 H
Analogue output DC Power input
Terminals for isolated voltage or Positive to L/+, Negative to N/-
current source output options. Voltage range 7 to 30VDC
RS232 connections
Terminal Printer PC 9 way D type plug
TXD RXD Pin 2, Receive data
GND GND Pin 5, Signal ground
RXD Pin 3, Transmit data
Load cell connections Potentiometric transducer version
EX+ Excitation positive Transducer positive
SIG+ Signal positive Signal output (wiper)
SIG- Signal negative No connection
Ex- Excitation negative (Can also be used for screen) Transducer negative

Suppression
When relays are used to switch an inductive load, such as a contactor, a solenoid or another relay, a
suppressor should be fitted across the coil. This will suppress the high voltage spike which would otherwise be
generated when the coil is de-energized. If not suppressed this can affect instruments in the vicinity, including
the SY035, and significantly reduce the life of the relay contacts. A varistor of the appropriate voltage, or a
capacitive suppressor can be used. The ideal way to connect power to the controller and the inductive load is
to use two separate power supply’s one to power the controller and one for the contactor, solenoid or relay, if
that isn’t possible source the controller and inductive load separately (Fig2).
Fig1: Example showing a capacitive suppressor
Fig2: How to source the controller and solenoid separately