Transcript
SCALELINK WIRELESS TRANSCEIVER TECHNICAL MANUAL RELEASE DATE: 10/2006 Copyright © 2006 Western Scale Co. Limited. All rights reserved. Published by: Western Scale Co. Limited. Information in this Installation / Technical Manual is subject to change without notice due to correction or enhancement. The information described in this manual is the property of Western Scale Co. Ltd. No part of this manual may be reproduced or retransmitted in any form, without the expressed written permission of Western Scale Co. Limited. Western Scale Co. Limited 1670 Kingsway Ave., Port Coquitlam, B.C. CANADA V3C 3Y9 Tel: (604) 941-3474 Fax: (604) 941-4020
[email protected] www.westernscale.ca
FOR TECHNICAL SUPPORT REGARDING THIS PRODUCT, PLEASE CALL YOUR AUTHORIZED WESTERN DEALER:
ScaleLink Technical Manual
TABLE OF CONTENTS TABLE OF CONTENTS .................................................................................................... 1 INTRODUCTION............................................................................................................... 2 SCALELINK FEATURES .................................................................................................. 3 POWER WIRING .............................................................................................................. 6 Power Requirements..................................................................................................... 6 AC Adaptor.................................................................................................................... 6 Indicator “Piggy-back” Power ........................................................................................ 6 COMMUNICATIONS WIRING .......................................................................................... 7 RS 232 Wiring ............................................................................................................... 7 RS 422/485 Wiring ........................................................................................................ 7 20 mA Current Loop Wiring........................................................................................... 7 SCALELINK CONFIGURATION ....................................................................................... 8 COMMUNICATIONS DIPSWITCH BANK (SW1).......................................................... 8 Switches 1 & 2: Communication Mode..................................................................... 8 Switches 4, 5, & 6: Parity ......................................................................................... 8 Switches 7, 8, & 9: Baud Rate.................................................................................. 9 RADIO OPTIONS DIPSWITCH BANK (SW2) .............................................................. 9 Switches 1, 2, & 3: Radio Channel Select................................................................. 9 Switch 8: RS-485 Termination Resistor ................................................................... 9 DIAGNOSTIC INDICATOR LIGHTS ............................................................................... 10 SCALELINK EXAMPLES ................................................................................................ 12 Example 1: Weight Indicator to PC (RS 232)............................................................. 12 Wireless Connection Test ....................................................................................... 13 Example 2: Weight Indicator to Aurora Remote Display (20 mA Loop) ..................... 14 Wireless Connection Test ....................................................................................... 15 SOFTWARE CONFIGURATION..................................................................................... 16 Example: Select the Radio Channel .......................................................................... 17 TROUBLESHOOTING & ERROR MESSAGES ............................................................. 18
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ScaleLink Technical Manual
INTRODUCTION The ScaleLink Wireless Transceiver allows Scale Technicians with little or no knowledge of radio communications to quickly and confidently set up Wireless Weighing systems. While directly eliminating costly and time consuming installation steps like trenching, running wire, and conduit, the ScaleLink can increase the range of the system while decreasing the risk of damage due to transient voltages and lightning. Whether communicating between indicators, remote displays, PC computers, or digital summing modules, the ScaleLink can be universally connected to any device with a serial port. Combining experienced and trusted radio frequency technology with the durability, functionality, and versatility expected from Western, the ScaleLink is truly engineered for the diversity of the weighing industry.
Disclaimer The following TECHNICAL information is for the exclusive use of WESTERN Dealers. Installation and configuration procedures (as described in this manual) should only be carried out by qualified Scale Service Technicians as authorized by Western.
Scale Service Technicians handling ScaleLink PCBs must observe proper electrostatic discharge (ESD) handling ATTENTION! Unauthorized installation and service of this unit may void the warranty. ATTENTION! Only approved antennas may be used with this device to ensure compliance. Contact the factory for more info.
WARNING: This equipment is approved only for mobile and base station transmitting devices, separation distances of (i) 20 centimeters or more for antennas with gains < 6 dBi or (ii) 2 meters or more for antennas with gains ≥ 6 dBi should be maintained between the antenna of this device and nearby persons during operation. To ensure compliance, operation at distances closer than this is not recommended.
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ScaleLink Technical Manual
SCALELINK FEATURES Antenna
SMA Connector & Washer Power/Transmit LED Receive LED
Strain-Relief Mounting Holes
ROBUST & LONG RANGE • Up to 300 ft. Indoor/Urban/Through walls • Over 1000 ft. Outdoor/Line-of-sight • 6 Unique Radio Channels • Weather-proof enclosure MULTIPLE COMMUNICATION MODES • Supports RS 232, RS 422, 20 mA Current Loop, and multiple data formats (parity, stop bits, etc.) • Continuous data stream up to 19.2 kbs. • Communicate between devices using different baud rates EASY TO INSTALL AND USE • ScaleLink can replace any serial cable, transmitting and/or receiving, right out of the box. • No software set-up required • Technicians use dipswitches to adjust baud rate, radio channel, and more • Terminal wiring with no special cables, connectors, or soldering. ADVANCED CAPABILITIES • Programmers can use software interface to customize and secure ScaleLink settings and access more features. • Advanced features include I/O Support (MODBUS & more), Multidrop networking, and more…
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ScaleLink Technical Manual
SPECIFICATIONS & RADIO PRINCIPLES Transmit Output Power: 140 mW. Transmission strength of the radio signal. Receiver Sensitivity: -110 dBm (or 0.00000000001 mW). Sensitivity is maximized so super strong transmissions are not needed, reducing power consumption and cost. Frequency Band: 900 MHz. Spread Spectrum Frequency Hopping: Transmissions are rapidly switched among 25 frequency channels within the band and re-organized by the receiving unit, reducing interference from other signals on the same band. Interference Blocking: 60 dB. The ScaleLink’s radio module has sufficient interference “blocking” that interfering devices would typically have to output over 100,000 Watts to significantly affect it (roughly the same as an FM radio station). Data Throughput: 9600 bps. Transmissions always occur at this rate. If the ScaleLink is fed data at 1200 bps, it is transmitted at 9600 bps. The receiving ScaleLink may then feed this data at a different rate to its device. Transmitting data above 9600 bps to the ScaleLink may cause some data loss.
9600 bps
1200 bps
9600 bps
Synchronization: 8 to 50 ms. Time it takes for radios to synchronize on power up. Approvals: FCC: Contains FCC ID: OUR9XSTREAM The enclosed device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference and (2) this device must accept any interference received, including interference that may cause undesired operation. IC:
Contains Model 9XStream Radio (900 MHz), IC: 4214A-9XSTREAM NOTE: The ScaleLink converts 20 mA Current Loop transmissions to RS 232 before transmitting them. This is a one-way operation. The ScaleLink will NOT convert received RS 232 signals to 20 mA.
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ScaleLink Technical Manual
INSTALLATION Pre-Installation •
It is always good practice to verify that the ScaleLink is complete and undamaged upon receipt.
•
Check over packaging for any signs of damage.
•
Remove the ScaleLink from its protective packaging and check for damage.
•
Verify that the shipment includes: o
ScaleLink Wireless Transceiver
o
Antenna
o
Power adaptor (if ordered)
o
Interface cable (if ordered)
Opening the ScaleLink Enclosure 1. Make sure the unit is disconnected from power 2. Remove the screws from the back of the enclosure 3. Pull the lid and enclosure apart
Assembly 1. Verify the radio module is seated properly in the terminals. 2. Run communication and power cables through the strain-relief and tighten the fitting. 3. Place the rubber washer over the radio module’s SMA connector and screw on the antenna.
Mounting Instructions The ScaleLink can be mounted on interior or exterior surfaces with #10 screws or 3/16ths bolts.
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ScaleLink Technical Manual
POWER WIRING Power Requirements The ScaleLink requires at minimum 6 Volts DC at 200 mA. The ScaleLink may be powered by the optional AC Adaptor or via “piggy-back” power from the indicator or other communicating device. SCALELINK POWER REQUIREMENTS Voltage: 6 to 18 Volts DC Current: 200 mA (minimum)
AC Adaptor 1. Ensure the AC Adaptor is not plugged in. 2. Run the power cable through the strain-relief and wire to the Terminal Block (J1). See table below: SCALELINK POWER TERMINAL (J1) +12V GND
AC ADAPTOR + (WHITE WIRE) – (BLACK WIRE)
Indicator “Piggy-back” Power 1. Ensure the indicator is not plugged in. 2. Verify that indicator’s power source will be able to meet the ScaleLink’s minimum power requirements. 3. Run an appropriate power cable through the strain-relief and wire the indicator power to the Terminal Block (J1). See table below: SCALELINK POWER TERMINAL (J1) +12V GND
INDICATOR POWER TERMINAL 6 – 18 volts DC – , or COM
NOTE: Check with your indicator’s manufacturer regarding using “piggy-back” power for the ScaleLink Transceiver.
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ScaleLink Technical Manual
COMMUNICATIONS WIRING RS 232 Wiring 1. Ensure the ScaleLink and communicating device (indicator) are disconnected from power. 2. Run communication cable through the strain-relief and wire to the appropriate RS 232 Terminal (J3). See table below: SCALELINK TERMINAL (J3) RX TX COM
COMMUNICATING DEVICE TX RX SIG GND, or COM
RS 422/485 Wiring 1. Ensure the ScaleLink and communicating device (indicator) are disconnected from power. 2. Run the communication cable through the strain-relief and wire to the appropriate RS 422/485 Terminal (J4). See table below: SCALELINK TERMINAL (J4) RX+ RXTXTX+ COM
COMMUNICATING DEVICE TX+ TXRXRX+ SIG GND, or COM
20 mA Current Loop Wiring (Passive Only) 1. Ensure the ScaleLink and communicating device (indicator) are disconnected from power. 2. Run the communication cable through the strain-relief and wire to the appropriate 20 mA Terminal (J5). See table below: SCALELINK TERMINAL (J5) RX+ RX-
COMMUNICATING DEVICE TX+ TX-
NOTE: The 20 mA Current Loop must be driven by the indicator. The ScaleLink is not an “active” 20 mA device.
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ScaleLink Technical Manual
SCALELINK CONFIGURATION Communications settings for the ScaleLink can be adjusted via the dipswitch banks (SW1 & SW2) inside the enclosure. ScaleLink Wireless Transceivers are configured at the factory to work right out of the box with devices using: • • •
• •
RS-232 Communications 9600 Baud No Parity
8 Data Bits 1 Stop Bit
Communications Dipswitch Bank (SW1) Switches 1 & 2: Communication Mode COMMUNICATION MODE RS-232 (Default) RS-422/485 * 20 mA Current Loop Not Used
SWITCH 1 OFF ON OFF ON
SWITCH 2 OFF OFF ON ON
NOTE: When using the RS-422/485 protocol over long distances, a Termination Resistor may need to be activated. See SW2 Switch 8: RS-422/485 Termination Resistor (Page 9). Switch 3: Software Configuration Runs the ScaleLink at default communication settings (9600, N, 8, 1). Software Configuration is also used to access the full range of radio features when programming the radio for complex, custom applications. Please see Page 16 or contact the factory for more information. SOFTWARE CONFIGURATION DISABLED ENABLED (Default)
SWITCH 3 OFF ON
NOTE: If Software Configuration is enabled, all dipswitch settings are over-ridden. FOR DIPSWITCH SETTINGS TO TAKE EFFECT, SWITCH 3 MUST BE SET TO “OFF”. Switches 4, 5, & 6: Parity PARITY NONE (Default) EVEN ODD MARK SPACE
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SWITCH 4 OFF ON OFF ON OFF
SWITCH 5 OFF OFF ON ON OFF
SWITCH 6 OFF OFF OFF OFF ON
ScaleLink Technical Manual Switches 7, 8, & 9: Baud Rate BAUD RATE 1200 (Default) 2400 4800 9600 19200 38400 57600 Not Used
SWITCH 7 OFF ON OFF ON OFF ON OFF ON
SWITCH 8 OFF OFF ON ON OFF OFF ON ON
SWITCH 9 OFF OFF OFF OFF ON ON ON ON
Radio Options Dipswitch Bank (SW2) Switches 1, 2, & 3: Radio Channel Select The ScaleLink has 6 frequency channels (0 to 5). If there are multiple radio installations at a given site, each installation must have its own radio channel selected. RADIO CHANNEL 0 (Default) 1 2 3 4 5 Not Used Not Used
SWITCH 1 OFF ON OFF ON OFF ON OFF ON
SWITCH 2 OFF OFF ON ON OFF OFF ON ON
SWITCH 3 OFF OFF OFF OFF ON ON ON ON
Switch 4: Reserved for Future Use Switch 5: Reserved for Future Use Switch 6: Reserved for Future Use Switch 7: Reserved for Future Use
Switch 8: RS-485 Termination Resistor
The ScaleLink has a built in termination resistor (when required). This switch must be set to enable the termination resistor on the Transceiver. RS-422/485 TERMINATION RESISTOR
DISABLED (Default) ENABLED
SWITCH 8
OFF ON
Switch 9: Reserved for Future Use
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ScaleLink Technical Manual
DIAGNOSTIC INDICATOR LIGHTS (EXTERNAL)
STS
POWER/TRANSMIT 3.3V RECEIVE
Power/Transmit Light (RED) OFF:
The ScaleLink is not installed or working properly.
STEADY ON:
The ScaleLink is receiving power and working properly. The steady illumination also indicates nothing is being received for transmission from the device.
FLICKERING:
Data is being received from the device and transmitted.
Receive Light (GREEN)
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OFF:
The ScaleLink is not receiving any data from another wireless installation.
FLASHING:
Each time the ScaleLink receives data from another wireless installation, the light flashes on.
ScaleLink Technical Manual
DIAGNOSTIC INDICATOR LIGHTS (INTERNAL) Input Power Light (3.3Vok) Location: Right-hand side of the ScaleLink PCB. ON:
The ScaleLink is connected to a proper power source.
OFF:
The ScaleLink is not receiving a proper voltage from the power source.
Status Light (STS) Location: Upper left-hand corner of the ScaleLink PCB. BLINKING: (steadily) STEADY ON:
The ScaleLink processor is running normally.
OFF:
The ScaleLink processor is not running.
The ScaleLink processor is locked up.
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ScaleLink Technical Manual
SCALELINK EXAMPLES Follow these 2 examples of common ScaleLink applications. Remember, the ScaleLink can be used to replace any serial communication cable. Example 1: Weight Indicator to PC (RS 232) For this example, we connect a weight indicator in a Scale Shack to a PC in the customer’s offices. Two-way communication is required as the scale is continuously polled and can be zeroed remotely by the program running on the office PC. • • •
Equipment:
Device 1: Indicator
2 ScaleLink Wireless Transceivers 6 conductor cable (Belden 8777) & connectors 1 AC Adaptor
ScaleLink #1
ScaleLink #2
Device 2: PC
PC: 1. Verify that the PC program serial port is set up to transmit/receive: •
At 9600 Baud, No Parity, 8 Data bits, 1 Stop bit
•
With NO HARDWARE HANDSHAKING
If these settings cannot be changed on the indicator, the ScaleLink’s Configuration can be adjusted (See page 8). 2. A DB-9 connector is needed to interface to the PC serial port. Solder conductors to connector pins. 3. Wire the 3 conductors to the RS 232 Terminal Block (J3) on ScaleLink #1. See table below: SCALELINK RS 232 TERMINAL (J3) TX RX COM
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PC PIN 2 (RX) PIN 3 (TX) PIN 5 (SIG GND)
ScaleLink Technical Manual
PC (Continued) 4. Wire the optional AC Adaptor to the Power Terminal Block (J1) on ScaleLink #1. 5. Apply power to ScaleLink #1. 6. Each time the PC program sends a poll character out to the indicator, the Power/Transmit light (red LED) should blink. Indicator: 1. Verify that the indicator is outputting: •
At 9600 Baud, No Parity, 8 Data bits, 1 Stop bit
•
With NO HARDWARE HANDSHAKING
If these settings cannot be changed on the indicator, the ScaleLink’s Configuration can be adjusted (See page 8). 2. Disconnect power from the indicator and run the cable to ScaleLink #2. 3. Wire 2 conductors (1 pair) from the cable for “piggy-back power” 4. Wire 3 conductors from the appropriate COM port on the indicator to the RS 232 Terminal Block (J3) on ScaleLink #2. 5. Apply power to the indicator. •
ScaleLink #2’s Power/Transmit light (red LED) should illuminate. If the light is blinking or flickering, the indicator may be transmitting continuously (Set indicator to poll mode).
•
The Receive light (green LED) should flash each time a poll character is received from the PC program
Wireless Connection Test 1. Add weight to the scale. 2. Verify that the PC program is correctly receiving Weight, Measurement Units, and Weighing Mode (GR, NT) as shown on the scale indicator. 3. If the weight readings are incorrect, erratic, or very slow, a different radio channel may need to be selected.
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ScaleLink Technical Manual
Example 2: Weight Indicator to Aurora Remote Display (20 mA Loop) In this example, we add an Aurora Remote Display to an existing installation using wireless to avoid running more cables from the weight indicator. Only oneway communication is required as the scale outputs continuously to the Aurora. We also assume there is another wireless communication installation nearby. Equipment:
• • •
1 Aurora Remote Display with integrated wireless option 1 ScaleLink Wireless Transceiver 4 conductor (min.) cable (Belden 8723)
Device 1: Indicator
ScaleLink
Device 2: Aurora Remote Display with integrated wireless
Indicator / ScaleLink: 1. Verify that the indicator is outputting CONTINUOUSLY from its 20 mA Current Loop port. 2. Disconnect power from the indicator and wire 2 conductors (1 pair) for “piggy-back power” from the indicator to the ScaleLink. 3. Wire 2 conductors from the cable for communications from the 20 mA Loop port on the indicator to the 20 mA Terminal Block (J5) on the ScaleLink. 4. Disable the ScaleLink’s default settings (Software Configuration) on SW1 Switch 3. SOFTWARE CONFIGURATION DISABLED
SWITCH 3 OFF
5. Set the SW1 dipswitches to 20 mA Current Loop mode. COMMUNICATION MODE 20 mA Current Loop
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SWITCH 1 OFF
SWITCH 2 ON
ScaleLink Technical Manual
Indicator / ScaleLink (Continued) 6. Set the SW2 dipswitches to change the Radio Channel from the default to avoid interference. RADIO CHANNEL 2
SWITCH 1 OFF
SWITCH 2 ON
SWITCH 3 OFF
7. Apply power to the indicator. The ScaleLink should now be transmitting the indicator’s output string. 8. The ScaleLink’s Power/Transmit light (red LED) should illuminate and begin blinking or flickering to indicate the indicator is transmitting continuously. 9. The ScaleLink’s Receive light (green LED) should NOT flash as the Aurora remote display does not transmit any data. If the Receive light flashes, a different Radio Channel may need to be selected. Aurora Remote Display: •
Once the integrated wireless option is added to the Aurora, it is ready to receive signals on power up.
•
Use the dipswitches in the Aurora to select Radio Channel 2 (See Aurora Manual).
Wireless Connection Test 1. Add weight to the scale. 2. Verify that the Aurora is correctly displaying Weight, Measurement Units (kg, lb), and Weighing Mode (GR, NT) as shown on the scale indicator. 3. If the Aurora’s readings are incorrect, erratic, or very slow, a different radio channel may need to be selected.
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ScaleLink Technical Manual
SOFTWARE CONFIGURATION Software Configuration may be used to adjust ScaleLink settings or access advanced ScaleLink applications via PC. To use Software Configuration, Switch 3 on the Communications Dipswitch (SW1) bank must be ON. A PC with MaxStream X-CTU software is required (Contact factory). ATTENTION! Software Configuration should only be attempted by Technicians/Programmers with prior ScaleLink experience. 1. Install MaxStream X-CTU software on PC. 2. Connect the ScaleLink (RS 232 Terminal) to a PC Com Port using a serial interface cable. 3. Open MaxStream X-CTU software and select appropriate Com Port (i.e. COM 1).
4. Click “Test/Query” button to verify communications. A window appears stating “Communication with modem…OK”.
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ScaleLink Technical Manual
SOFTWARE CONFIGURATION (Continued) 5. Click on the MODEM CONFIGURATION tab. 6. Select the appropriate radio (X09-009) from the MODEM pull-down menu. This information can be found on the front of the radio module. 7. Click the READ PARAMETERS button. The ScaleLink will send its current set-up information to the PC. Example: Select the Radio Channel 1. Scroll down to the “Networking folder”. 2. Click on the “Hopping Channel” parameter. 3. Enter the desired channel number (0 - 6). 4. Click the “Write Parameters” button. The PC will send the new set-up information to the ScaleLink.
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ScaleLink Technical Manual
TROUBLESHOOTING & ERROR MESSAGES •
Verify power source (Outlets, breakers, AC Adaptor.)
•
Check Terminal Block connections inside the enclosure.
•
Verify that the radio module is properly seated in its terminals and the antenna is connected.
•
Verify the correct terminal (RS 232, 422/485, 20 mA) is being used and check wiring.
•
Verify that data is being transmitted by the device (indicator).
•
Verify baud rate and other communication parameter settings.
•
Verify Radio Channel settings.
•
Verify that the radio module is properly seated in its terminals and the antenna is connected.
•
Verify the correct terminal (RS 232, 422/485, 20 mA) is being used and check wiring.
•
Verify that data is being transmitted by another ScaleLink.
•
Verify Radio Channel settings.
•
Verify baud rate and other communication parameter settings.
STS light NOT blinking (OFF):
•
Verify that unit has power. When powered, if the Status light remains OFF, the processor is not running.
STS light NOT blinking (ON):
•
Processor locked up. Cycle power to the unit by pushing “RST” button on PCB or unplugging/plugging in unit.
Unit won’t power up:
Unit not transmitting: (Red LED does not flash)
Unit not receiving: (Green LED does not flash)
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