AMS DCB-274 Single axis, RS-232 connection using AMS SIN-7 adapter, RS-232 Daisy Chain connection

Page 22

ADVANCED MICRO SYSTEMS, INC.							SERIAL INTERFACE
		SIN-7
RS-232	2	TXD				3 TX-

	3	RXD				4 RX-
Computer
	5	CTS				1 MVG
DB-25						2 GND
	1,7	GND

6DST

20 DTR

Single axis, RS-232 connection using AMS SIN-7 adapter

The other method, called “daisy chain,” is for multi-axis applications and is NOT recommended by AMS. Daisy chain is accomplished by interconnecting one or more axis in “series.” Here, the TXD output of the first axis is connected to the RXD input of the next axis, etc., with the last axis TXD connected to the RXD of the computer.

SIN-7

RS-232	2	TXD				3 TX-

	3	RXD				4 RX-
Computer
	5	CTS				1 MVG
DB-25						2 GND
	1,7	GND

6DST

20 DTR

3RX-

4TX- \

AMS RS-232 controller “Y”

RS-232 “Daisy Chain” connection

Advantages of this configuration include:

1.Dynamic addressing (the axis address is assigned at each initialization) and do not have to be pre - assigned or stored in NV memory.

2.Lowest cost because, RS-232 adapters are passive, without any electronics.

Disadvantages:

1.RS-232 is less reliable than RS-422 and is more susceptible to noise.

2.Multiple axis RS-232 configurations are difficult to analyze.

3.Complex wiring.

A single axis RS-232 system will operate well and is easy to implement. Multiple axis daisy chained systems are not recommended.

The AMS demo program (“EASI”) does support daisy chain and single axis RS-232 mode.

1 6

Image 22

Contents Nashua, NH Page Revision Date 07/05/06 Page Advanced Micro SYSTEMS, INC Addenum Introduction Limitations or Exceptions for the DCB-274Features Product OverviewRequired Hardware for Operation SIN-8Out of the Box Quick Start Connect the Motor After Sign-onDual Ammeter Circuit Serial Interface J2, J3 Advanced Micro SYSTEMS, INC Hardware Connections J1, J4Standard Mode- Sinking Inputs Pin 7 VIO Reference InputInput Ports PLC Mode- Sourcing InputsTypical User Input Circuit Output PortsPort Encoder Input Option J1Typical Output Circuit Step and Direction Inputs J1 Power Supply and Motor Connection J5Encoder Inputs J1 Typical Wiring Diagrams for Step Motors Baud Rate Jumpers B1, B2Environmental SpecificationsElectrical PhysicalPhysical Dimensions RS-232 OverviewRS-232 Hardware RS-422Single axis, RS-232 connection using AMS SIN-7 adapter RS-232 Daisy Chain connectionParty Line Connect Cable SpecificationsRS-422 Party Line Hardware RS-422 Party LineRS-422/485 BUS-drop SIN-8 Serial AdapterSIN-8, RS-232 to RS-422 converter SIN-10 Intelligent Serial Adapter Other Party Line SignalsSIN-10, intelligent serial line converter Serial Communications Overview Party Line ModeDaisy Chain Mode not recommended for more than 1 axis Serial Communications SoftwareEasi Software Serial Interface Using EasiBaud Rate Sign-OnExamine Command Daisy Chain Start-Up Simple Command ExamplesAxis Name Assignment Verify the Program NV Memory ProgrammingExecute the Program Edit Program Party Line and Daisy Chain Line CommandsSome Rules Command Example Party Line StartupAnatomy of Instruction Execution Interrupt Commands Command Cycle ExamplesAdvanced Micro SYSTEMS, INC Serial Interface Advanced Micro SYSTEMS, INC Serial Interface Non-Volatile Memory Details Memory MapDefault Table Turbo RamESC Global Abort Command Format Description@ Soft Stop Inputs ResetPort Read/Write OutputsProgramming Example Set Jog Speeds Lower case B Fast and Slow DecayClear and Restore NV Memory Divide SpeedsNormally Closed Home Switch Normally Open Home SwitchFind Home Special case Go Step Resolution Initial VelocityJump to Address a, n+1 times Lower case I Restart Special TripRamp Slope Lower case K Trip Output Value Advanced Micro SYSTEMS, INC SMC-27X2 Software Lower case L Option Flags Loop on PortFlags and Numbers Make Step and Direction Outputs Flag PLC Mode FlagLimit Polarity Flag Moving Output FlagPort 4 Input Flag Move at a Constant VelocityGentle Limit Flag Program Mode Set OriginIndex Relative to Origin Save Trip PointSet Slew Speed Wait Lower case W Pre-energizeExamine Hold and Run CurrentRead Position Read NV Memory Read Limits, Hardware+ Index in Plus Direction Index in Minus DirectionRead Moving Status \ Write to NV MemorySelective Termination Name AxisParty Line Mode AMS SIN-11 Serial AdapterCommand Summary Advanced Micro SYSTEMS, INC AddendumAscii Character Code Ctrl Char Dec Hex CodeStep Motor Characteristics About Step Motor CurrentMotor Choice Determining the Current ValueAmps and Wire Count and Power Basic 8 Wire MotorWire Motor Application Notes V1.10 Double Speed Characteristics Decay ControlSerial Adapter Summary