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FTB-2 и FTB-2 Pro. Руководство пользователя - часть 18

Preparing for Automation

Configuring DCOM Access to Your Unit

17. In the Select Users or Groups dialog box, under Enter the object

names to select, type the name of the user to whom you want to give

access permissions for remote access.

18. Tap OK.

19. In the Access Permission dialog box, select a user.

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Configuring DCOM Access to Your Unit

20. To allow this user to access the unit remotely, select Allow for both

permission choices.

Note: You can also deny connection permission for specific users.

21. Repeat steps 19 and 20 for each newly added user.

22. Tap OK to close the Access Permission dialog box.

23. Tap OK to close the EXFO KernosHost Properties dialog box.

24. Restart your unit.

The EXFO IcSCPIAccess Class component, located on your unit, can

now be accessed with DCOM.

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Preparing for Automation

Configuring DCOM Access to Your Unit

Enabling DCOM on Client Computer

Note: To run DCOMCNFG.EXE, you need Administrator access rights.

If you want to subscribe to EXFO IcSCPIAccess Class component events,

you need to set security parameters on the client computer.

To enable DCOM on the client computer:

1. Start Windows, on the taskbar, click Start (Start button (

) under

Windows 8.1) and select Run.

2. In the Open box, type “DCOMCNFG.EXE” and tap OK.

3. In the Component Services dialog box, select: Console Root >

Component Services > Computers to show available computers.

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Configuring DCOM Access to Your Unit

4. Right-click My Computer, and then select Properties.

5. In the My Computer Properties dialog box, tap the Default Properties

tab.

6. Select Enable Distributed COM on this computer.

7. Under Default Distributed COM Communication Properties, in the

Default Authentication Level list, select Connect.

8. In the Default Impersonation Level list, select Identify.

9. Tap Apply.

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Configuring DCOM Access to Your Unit

10. Tap the COM Security tab and, under Access Permissions, tap Edit

Limits.

11. In the Access Permission dialog box, ensure that, for ANONYMOUS

LOGON, local and remote accesses are allowed.

If ANONYMOUS LOGON is not listed under Group or user names, tap

Add to add it.

For more information on enabling events with DCOM, refer to

AppId Key in MSDN Documentation.

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Configuring DCOM Access to Your Unit

Disabling DCOM Access to Your Unit

Note: To change the DCOM access to your unit, you need Administrator access

rights.

If you no longer want client computers to access your unit using DCOM,

you can disable this access.

To disable DCOM access to your unit:

1. From the main window, tap the System Settings button.

2. Tap Control Panel.

3. Tap System and Security > Administrative Tools.

4. Double-tap Component Services.

5. From the Component Services window, select: Console Root >

Component Services > Computers > My Computer > DCOM Config

to show the contents of the DCOM Config folder.

6. From DCOM Config, right-click EXFO KernosHost, and select

Properties.

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Preparing for Automation

Configuring DCOM Access to Your Unit

7. In the EXFO KernosHost Properties dialog box, tap the Security tab.

8. Under Launch and Activation Permissions and Access Permissions,

select Use Default.

This ensures the EXFO IcSCPIAccess Class component uses the default

lists instead of the customized lists.

9. Tap OK.

10. Restart your unit.

The EXFO IcSCPIAccess Class component, located on your unit,

cannot be accessed with DCOM.

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Preparing for Automation

Preparing to Control Modules with a Dedicated Application

To activate or deactivate remote control:

1. From the main window, tap the System Settings button.

2. Tap Remote Control Configuration.

3. If necessary, tap Change settings, and then, when the application

prompts you to authorize the changes to your unit (identified as

“computer”), select Yes.

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Preparing for Automation

Preparing to Control Modules with a Dedicated Application

4. From the Remote Control Configuration window you will see all the

inserted modules. Select the module for which you want to have a

remote access.

Note: Modules for which remote control is not supported are identified as

unrecognized.

5. Set the parameters:

 Select Remote Control to let another user control the module from

a computer.

 Select Standalone to leave the module active even if all users

close their dedicated applications.

6. If desired, under Description, type a description that will help you

identify the instrument.

Note: You can enter up to 10 characters. The description can correspond to the

test interface ID or to any other short text of your choice.

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Preparing to Control Modules with a Dedicated Application

7. If necessary, under LINS, modify the logical instrument number that

you will use to access the instrument remotely.

8. Tap Apply to confirm your changes or OK to apply your changes and

close the window.

Note: This information will be updated the next time you start the module

application and will appear in the title bar if the module application allows

it. Refer to the corresponding module documentation for more details.

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Preparing to Control Modules with a Dedicated Application

To shut down the remotely-controlled module:

Tap Shut Down Module.

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Using Your Unit and Modules in an Automated Test Environment

Standard Status Data Structure

Standard Status Data Structure

Each device that is physically connected to the remote bus has four status

registers with a structure complying with the IEEE 488.2 standard. These

registers allow the controller to monitor events and get useful information

on the status of the devices it controls.

 Standard Event Status Register (ESR)

 Standard Event Status Enable Register (ESE)

 Status Byte Register (STB)

 Service Request Enable Register (SRE)

ESR and ESE

The standard event status register and status enable register information is

presented in the following table.

Bits

Mnemonics

Bit Value

7

Power On (PON)

128

6

User Request (URQ)

64

5

Command Error (CME)

32

4

Execution Error (EXE)

16

3

Device-Dependent Error (DDE)

8

2

Query Error (QYE)

4

1

Not Used (N.U.)

0

0

Operation Complete (OPC)

1

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Using Your Unit and Modules in an Automated Test Environment

Standard Status Data Structure

The following table presents a summary of the possible operations on ESR

and ESE registers.

Register

Read

Write

Clear

ESR

Use *ESR?.

Impossible

 Use *CLS.

to write.

 Read the register.

ESE

Use *ESE?.

Use *ESE.

Use *ESE with a value equal to 0.

STB and SRE

The status byte register and service request enable register information is

presented in the following table.

Bits

Mnemonics

Bit Value

7

Not Used (N.U.)

0

6

Master Summary Status (MSS)/ Service

64

Request (RQS)

5

Event Summary Bit (ESB)

32

4

Message Available (MAV)

16

3

Not Used (N.U.)

0

2

Error Available (EAV)

4

1

Not Used (N.U.)

0

0

Not Used (N.U.)

0

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Standard Status Data Structure

The following table presents a summary of the possible operations on STB

and SRE registers.

Register

Read

Write

Clear

STB

 Use *STB?.

Impossible to write;

Use *CLS before

the register content is

sending a query (to

 Use serial poll (GPIB

only modified when

clear the Event registers

bus sequence that

the Event registers or

and Queues and by the

allows retrieval of the

Queues are modified.

same token clear the

value without

STB register).

interrupting the current

process).

SRE

Use *SRE?.

Use *SRE with a value

 Use *SRE with a

equal to 0 to disable

value equal to 0.

the register or with a

 At startup, the

value equal to 1 to

register is set to 0.

enable it.

The diagram displayed on the next page is a useful aid in understanding

the general commands and how a service request (SRQ) is generated.

Using a service request, a device notifies the controller that an event

requiring special attention occurred. The controller will then find which

device generated a SRQ (its RQS bit is set) and the causes of it.

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