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London Electronics Limited
Thorncote Road, Near Sandy, Bedfordshire SG19 1PU
Tel +44(0)1767 626444
Fax +44(0)1767 626446
www.london-electronics.com help@london-electronics.com
Large display ASCII input RS232/485 remote display
EasyReader Model ER4S
Connection details, scaling and general information
Rear case screws - please note
The rear panel is held in place with finger-screws, which
only need to be gently tightened.
Do not use tools to tighten or loosen the screws, as
this could cause damage to the internal threads.
Document Ref:Anfield\manuals\english\ER4S
Date : 30 June 2009
Rev. 2
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Table of Contents
Related Manuals for London Electronics EasyReader ER4S
Summary of Contents for London Electronics EasyReader ER4S
- Page 1 London Electronics Limited Thorncote Road, Near Sandy, Bedfordshire SG19 1PU Tel +44(0)1767 626444 Fax +44(0)1767 626446 www.london-electronics.com help@london-electronics.com Large display ASCII input RS232/485 remote display EasyReader Model ER4S Connection details, scaling and general information Rear case screws - please note The rear panel is held in place with finger-screws, which only need to be gently tightened.
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Page 3: Table Of Contents
Warning - read first please Addresses and configuration ASCII Characters Baud rate Before you start... Brightness Characters Configuration of the termination character Configuration of the displayed characters Configuration of the rejected characters Connection examples Connections Wiring and Jumper record sheet Data descriptions Declaration of Conformity Description... -
Page 4: Introduction
Introduction Please contact us if you need help, if you have a complaint, or if you have suggestions to help us improve our products or services for you. If you contact us about a product you already have, please tell us the full model number and serial number, so that we can give you accurate and fast help. -
Page 5: Warning - Read First Please
Warnings Please carefully read all warnings and ONLY install the meter when you are sure that you’ve covered all aspects. Connect the meter according to current IEE regulations and separate all wiring according to IEC1010. Power supplies to this equipment must have anti-surge (T) fuses at 125mA for 230V supply, 250mA for 110V supply or 1A for DC supplies in the range 11-30VDC. -
Page 6: Brightness
Description The EasyReader-S accepts numeric serial ASCII data and displays it on a 4 digit LED readout. The digits are 57mm or 102mm high, depending on model. It can accept a limited range of alphabetic characters - limited by their ability to be represented accurately on a 7 segment type display. -
Page 7: Before You Start
Before you start ... First, please check that the display will suit all the requirements of your application. Page 4 has some important warnings - please check that all warnings are covered. Next, set the switches on the back of the display to suit the data type you’ll be using. See page 6. Remove the rear screws and slide the case apart. -
Page 8: Ascii Characters
Recognised ASCII Characters This display is intended mainly to show numeric ASCII characters... 0 to 9 , hex codes 30 to 39 You can FLASH the display on and off decimal point, hex code 2E (or 2C) repeatedly, if you include CTRL F (ASCII 06) and the minus sign, hex code 2D in the data string. -
Page 9: Connection Examples
Connections To access the connectors, you’ll need to remove the display from the wall and remove the 4 screws on the rear plate. You can operate the Tare, Peak/Valley and Reset functions remotely with contact closures, or with the front panel buttons. To activate the f ront panel buttons, must... -
Page 10: Baud Rate
Baud Rate adjustment Unlock the display - (see connections page) . Press the BAUD button for a few seconds. The present baud rate will appear. If you want to change the baud rate, press the up or down arrow button. Press the OK button to save your new choice. -
Page 11: Addresses And Configuration
ADDRESS CONFIGURATION Unlock the display - (see connections page) Press the ADDRESS button for a few seconds. The existing address will appear on the display. To change the address, press the up or down buttons. Press OK to save your choice. * If you don’t need addressing, please choose Adr.- - (Adr.00 less one) If you want to address your display, the data should be in this format:- : <ETX><STX><ADDRESS><DATA><ETX>... -
Page 12: Parity
PARITY SETTINGS Unlock the display - (see connections page) Press the two buttons marked “Special” until you see ‘P. no’ or ‘P. Ev.’ or P. od.’. ‘P. no’ signifies NO PARITY ‘P. Ev.’ signifies EVEN PAIRTY ‘P. od.’ signifies ODD PARITY Use the UP or DOWN buttons to change the parity setting, to suit your needs. -
Page 13: Idling Mode
Configuration TIME-OUT You can use the Time-Out function to create a warning message if data disappears (the data line is idle) for more than a preset time. You can also disable this function if data will arrive occasionally, for example from an operator’s keyboard. -
Page 14: Configuration Of The Rejected Characters
EJECT data configuration If you have a complex data string and want to display a certain part of it, you can use the ‘EJECT’ function to define how many characters to eject. The characters which will be lost will be between the string terminator, for example <CR>, and the data you want to display. -
Page 15: Configuration Of The Displayed Characters
DISPLAY configuration In the previous example, we wanted to display the value 2505. If the characters on the left (7768* in the example) are to be ignored, we can do this by telling the display to show only 4 characters. Here’s how we set the number of displayable characters ... -
Page 16: Configuration Of The Termination Character
Termination Character configuration This function is useful if the data string is complex and includes clearly identifiable characters which you can use as a reference point for identifying wanted data characters. Perhaps the best known termination character is the Carriage Return (identified by the code ASCII HEX 0d) Consider the following string : :<STX>55555_ABTOL_NETT_386.9Kg_SER02345<CR><ETX>... -
Page 17: Peak And Valley Detection
Peak and Valley memory The EasyReader-S continuously compares new incoming data with previous data and stores the minimum and maximum values in Peak and Valley memories. You can view these values by making a remote contact closure, or by pressing a button on the front panel of the display. Front panel button viewing of peak and valley. -
Page 18: Mounting The Display
How to Mount your display 1. Wall Mounting Wall mount your EasyReader display in a clean, dry environment. Drill 4 holes in your wall, spaced as you see in this diagram... The mounting screws you use should have a diameter between 3.4 and 4.6 mm and should be suitable for the material of the wall. - Page 19 How to Mount your display ... continued Suspension mount your EasyReader display in a clean, dry environment. 1. Suspension Mounting The mounting screws you use should have a diameter between 3.2 and 3.8 mm and should be suitable for the supporting material. You may need to use screw plugs or other screw accessories, if the material is not suitable to take screws directly.
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Page 20: Specifications
ASCII data input Choice of RS422, RS485, RS232 or 20mA TTY passive and active. Numeric in the range -1999 to 9999 Baud rates Choice of 300, 600, 1200, 2400, 4800, or 9600 Data makeup 7 data bits, with parity or 8 bits without parity 1 start bit, 1 or more stop bits. -
Page 21: Fault Finding
Fault Finding Problem Possible cause and solution The indicator accepts data and up- 1. A tare offset may be present. dates each time data arrives, but the data has an offset. Solution : Disconnect the unit. Make a contact closure between Reset and common. -
Page 22: Revisions
Modifications and revisions Revisions and modifications may be made from time to time, for several reasons if users ask for new options to be included in the functions. if users ask for functions to be modified in some way when errors in the manual are corrected when errors in the programme software are corrected whenever the product is otherwise improved or developed 29 Sept 2003... -
Page 23: Wiring And Jumper Record Sheet
Wiring and jumper record For future reference, record all the jumper positions and wiring colours you used in your installation. -
Page 24: Declaration Of Conformity
Signal cabling shall be routed separately to power carrying cabling (includes relay output wiring) All signal cabling shall be screened. The screen shall only be terminated to the power earth terminal. Declared as true and correct, for and on behalf of London Electronics Ltd. J.R.Lees...