AMS DCB-274 manual RS-422 Party Line Hardware, Party Line Connect, Cable Specifications

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ADVANCED MICRO SYSTEMS, INC.

SERIAL INTERFACE

RS-422 (Party Line) Hardware

AMS “Party Line” communication is an RS-422 design that uses RS-485 rated circuits. This interconnect is comparable to a LAN configuration. The hybrid design merges the best of both EIA specifications and maintains compatibility with EIA RS-422 and features:

∙Multi drop serial bus

∙Full duplex connection; receive data is one pair of wires and transmitted data a second pair.

∙Zero to five volt differential signals for high speed and robust noise rejection over long distances

∙Data speeds from 100K to10M Baud

∙Up to 32 controllers from one COM port

∙Cable network length to 1200 Meters (4000 ft)

One master host computer can address a device (axis) with a command. The single packet of up to 15 ASCII characters begins with a single character corresponding to the axis “name” and terminated with a single line- feed character. Handshake is necessary and is based on each transmitted character being echoed. Prior to the terminating LF character, numbers representing data such as position or limit status will be received. The protocol is similar to other manufactures but is different enough to prevent co-mingling of other manufactures devices.

Party Line Connect

AXIS A

AXIS B

AXIS “n”

 

 

SERIAL ADAPTER

 

 

 

COMPUTER

 

 

 

 

 

 

 

 

 

 

 

TERMINATOR

 

 

 

RS-422 “Party Line”

Party line hardware requires three components:

1.A serial adapter (RS-232 to RS-422),

2.A cable(s) and

3.A terminator (supplied with adapter).

Cable Specifications

Although 8-conductor (with 8 contact RJ -45 connectors at each end) flat “telephone” cable has been successfully used in the past, the recommended interconnect cable for party line use is UTP 24 AWG.. twisted pair (category 5) network cables, now available as standard from AMS. The older telephone cable is suitable for RS-232 or lab work.

Device (Axis) Connection

Each motor controller has two RJ-45 connectors for party line. All signals except the +5 volt power are connected in common. The +5 volt is isolated to prevent “back” feeding power supply voltage to any individual axis with the AC switched off or power removed. Thus, it is IMPORTANT that the interconnecting cables travel from the output connector (on right) of one axis to the input connector of the next axis (on left).

Two terminating resistors are used on the last differential line receiver. The serial adapter contains one resistor and a terminator plug is supplied to be used on the LAST axis in the Party bus.

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Contents Nashua, NH Page Revision Date 07/05/06 Page Advanced Micro SYSTEMS, INC Addenum Limitations or Exceptions for the DCB-274 IntroductionProduct Overview FeaturesSIN-8 Required Hardware for OperationOut of the Box Quick Start Dual Ammeter Circuit After Sign-onConnect the Motor Serial Interface J2, J3 Connections J1, J4 Advanced Micro SYSTEMS, INC HardwarePLC Mode- Sourcing Inputs Pin 7 VIO Reference InputInput Ports Standard Mode- Sinking InputsOutput Ports Typical User Input CircuitTypical Output Circuit Encoder Input Option J1Port Encoder Inputs J1 Power Supply and Motor Connection J5Step and Direction Inputs J1 Baud Rate Jumpers B1, B2 Typical Wiring Diagrams for Step MotorsPhysical SpecificationsElectrical EnvironmentalPhysical Dimensions RS-422 OverviewRS-232 Hardware RS-232RS-232 Daisy Chain connection Single axis, RS-232 connection using AMS SIN-7 adapterRS-422 Party Line Cable SpecificationsRS-422 Party Line Hardware Party Line ConnectSIN-8, RS-232 to RS-422 converter SIN-8 Serial AdapterRS-422/485 BUS-drop SIN-10, intelligent serial line converter Other Party Line SignalsSIN-10 Intelligent Serial Adapter Serial Communications Software Party Line ModeDaisy Chain Mode not recommended for more than 1 axis Serial Communications OverviewSign-On Serial Interface Using EasiBaud Rate Easi SoftwareExamine Command Axis Name Assignment Simple Command ExamplesDaisy Chain Start-Up Execute the Program NV Memory ProgrammingVerify the Program Some Rules Party Line and Daisy Chain Line CommandsEdit Program Party Line Startup Command ExampleAnatomy of Instruction Execution Command Cycle Examples Interrupt CommandsAdvanced Micro SYSTEMS, INC Serial Interface Advanced Micro SYSTEMS, INC Serial Interface Memory Map Non-Volatile Memory DetailsTurbo Ram Default Table@ Soft Stop Command Format DescriptionESC Global Abort Outputs ResetPort Read/Write InputsProgramming Example Lower case B Fast and Slow Decay Set Jog SpeedsDivide Speeds Clear and Restore NV MemoryFind Home Normally Open Home SwitchNormally Closed Home Switch Special case Go Initial Velocity Step ResolutionRamp Slope Lower case I Restart Special TripJump to Address a, n+1 times Lower case K Trip Output Value Advanced Micro SYSTEMS, INC SMC-27X2 Software Flags and Numbers Loop on PortLower case L Option Flags Moving Output Flag PLC Mode FlagLimit Polarity Flag Make Step and Direction Outputs FlagGentle Limit Flag Move at a Constant VelocityPort 4 Input Flag Set Origin Program ModeIndex Relative to Origin Trip Point SaveSet Slew Speed Lower case W Pre-energize WaitHold and Run Current ExamineRead Position Read Limits, Hardware Read NV MemoryIndex in Minus Direction + Index in Plus Direction\ Write to NV Memory Read Moving StatusName Axis Selective TerminationAMS SIN-11 Serial Adapter Party Line ModeAdvanced Micro SYSTEMS, INC Addendum Command SummaryCtrl Char Dec Hex Code Ascii Character CodeAbout Step Motor Current Step Motor CharacteristicsDetermining the Current Value Motor ChoiceBasic 8 Wire Motor Amps and Wire Count and PowerWire Motor Decay Control Application Notes V1.10 Double Speed CharacteristicsSerial Adapter Summary
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