VXI SM8000 user manual Operation, Resetting the Switch, Relay Registers Output Channel Selection

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VXI Technology, Inc.

OPERATION

SM8001 / SM8002 - Multi-Channel Switches

When controlling multi-switch modules, the operation is quite similar to that of any other SMIP II family product, but the data sent is operated on a little bit differently. The SM8000 must be configured to control the multi-switch device on one of four ports. This is done at the factory with hardware selectable jumpers. Once configured for multi-switch operation, the control of the switch is accomplished by writing to the appropriate Relay Register. Relay registers 02 through 08 are used to control the multi-switch modules. The value written to the multi-switch module is dependent on the type/size of the switch.

For example, if the switch is a 1xN switch, writing the value of 00h to Relay Register 02 would optically connect the switches input to the first output. A write of 0Ah would connect the input to the 11th output, and so on. Data lines 4 through 0 are used to transfer data to the switch modules.

The Busy signal from the optical module may be monitored to indicate when the optical module has completed moving to the commanded switch setting. The optical module also generates an Error signal that may be monitored. This signal might be used to provide a confidence check that the module is being controlled properly.

Resetting the Switch

When the switch is in reset (park) position, channel zero, or optical off, there is no optical connection to any output channel. Set the switch to the reset position to prevent optical data from passing through the switch, or to reset the stepper motor. During a reset operation, optical noise may appear on various output channels as the armature rotates.

There are two ways to reset the switch. The first is to cycle power to return the switch to the reset position. The second is to return the switch to the reset position using a sequence of writes to the SMIP module rather than interrupting the supply power. See the example of a multi-switch reset write sequence as described later in this manual. The BUSY output remains high until the reset operation is complete and the device is ready to receive additional instructions.

Relay Registers - Output Channel Selection

The following sections show information to select channels for the SM8001/8002 through the relay registers. Each configuration section includes an optical input/output relation figure, followed by a table that lists the control codes for channel selection.

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SM8000 Series Operation

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Contents SM8000 Series VXI Technology, Inc Table of Contents Control Modes VXI Technology, Inc SM8000 Series Preface Certification EMC Steve Mauga, QA ManagerVXI Technology, Inc SM8000 Series Preface Service should only be performed by qualified personnel Terms and SymbolsAvoid Electric Shock Support Resources VXI Technology, Inc SM8000 Series Preface Section OverviewSM8000 Series Optical Switch Controller SM8001 / SM8002 MULTI-CHANNELSWITCHES ConfigurationsDuplex 1 x N SM8001 / SM8002 Multi Switch Specifications PDL6SM8003 Prism Switches SpdtSM8003 Prism Switch Specifications PDL3SM8101 / SM8102 Optical Attenuators PDLSetting the Chassis Backplane Jumpers Calculating System Power and Cooling RequirementsIntroduction Example Setting the Logical AddressMSB LSB Selecting the Extended Memory Space Mating Optical Connectors Cleaning Optical ConnectorsOptical Connections SM8001 / SM8002 Multi-Channel Switches General DescriptionSM8003 Prism Switches SM8003 Prism SwitchesAttenuator Diagram SM8101 / SM8102 Optical AttenuatorsOperation Resetting the SwitchRelay Registers Output Channel Selection N Switch Configuration Duplex 1 x N Switch Configuration Common Active ChannelN Blocking Switch Configuration N Non-Blocking Switch Configuration Calculating Switching Time 8MULTI-SWITCH TimingSM8003 Prism Switches Starting the Device Control ModesUncalibrated Operation Move-To-Absolute-Step Calibrated OperationBusy Signal Error StatusResetting the Device Commanding the DevicesRegister Access AddressingSmip II Register MAP A16 Offset Write FunctionID Register Read Only Logical Address Register Write OnlyDevice Type Register Read Only Status Register Read OnlyControl Register Write Only Offset Register Read and WriteSerial Number High Register Read Only Serial Number Low Register Read OnlyInterrupt Control Register Read and Write Interrupt Status Register Read OnlySubclass Register Read Only NVM Access Register Read NVM Access Register WriteBoard X, Y Used Address Register Read and Write Trace RAM Start High Register Read and WriteTrace RAM End High Register Read and Write Trace RAM End Low Register Read and WriteTrace RAM Address High Register Read and Write Trace RAM Address LOW Register Read and WriteOpen Trigger Select Register Write Only TTL Trigger Polarity Register Write OnlyTrace RAM Control Register Read and Write Busy Trigger Control Register Read and WriteBoard Busy Register Read Only Trigger Advance Register Write OnlyReserved Registers Read and Write 1MB RAM See Typical Optical Multi Switch Operation Control Register Read and WriteControl Register Delay Register Read and Write Plug-In LA+0x104 Command Register Write Only Address Register Write Only Device Memory Relay Register OffsetRelay Register 00 Read and Write Writing to the Relay RegistersRegister 02 thru 08 Read and Write Relay Optical Module’s Data Attenuation LevelRegister 0A thru 0C Read Typical Optical MULTI-SWITCH Control Example Programming ExamplesTypical Optical Attenuator Control Example WriteVXI Technology, Inc Write Example Read ExampleCommand SET Command Transmit Data Receive Data Byte Byte Count30h 31h32h 35h6Ch 80h81h 82h83h 89h8Ah 8Bh8Ch 8Dh8Eh Recommends That the Optical MODULE’S 90hConvert to hexadecimal 96h A2hVXI Technology, Inc SM8000 Series Programming Index VXIbus
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