UNICORN access

In this section

This section describes how to solve the following UNICORN access problems:

  • Unable to access certain UNICORN functions

  • Connection problems

    Connections are not available

    System is not available

    Error message in a network installation

    You cannot control the system

  • Run data Connection in System Control displays a “NO [1]”, “NO [2]” or “NO [3]”.

Unable to access certain UNICORN functions

The table below describes an access problem and its solution:

Problem description

Solution

UNICORN functions to which you do not have access appear grey in the menu and cannot be used.

Choose Administration:User Setup in the UNICORN Manager to change the user profile.

Note: Contact the system administrator if you are not authorized to change your user profile.

Connection problems

The table below describes some connection problems and their solutions:

Problem description

Solution

The connections are not available.

  • Check the connection between the PC and the chromatography system.

  • Check that the power to the chromatography system is turned on.

The connections are not available even though

  • the connection between PC and chromatography system appears to be correct

  • the power is turned on.

  • Quit UNICORN.

  • Shut down and switch off the computer.

  • Switch off the chromatography system.

  • Restart the entire system.

A system is not available when you attempt to establish a connection.

Check that you have access rights to the system. Access rights are not automatically assigned for a newly defined system.

You receive the error message “Cannot connect to system...” in a network installation.

  • Check that the local computer to which the system is connected is turned on and logged on to the network.

  • Check that the computer where you try to establish a connection is logged on to the network.

  • Check that the limit of 8 connections to the system has not been exceeded.

You can establish a connection but cannot control the system, that is the Manual menu commands in the System Control are grey.

  • Check that no other user has a control mode connection.

  • Check that you have sufficient access rights to control the system manually.

Note: The Method Wizard can be used on a local system even if the network connection is not established.

The Connection field in System Control displays a “NO [X]”

The table below describes some connection problems and their solutions:

Problem Description

Solution

The Connection field in the Run data pane in System Control says “NO [1]” or “NO [2]”.

  • Check that the UNICORN PC Control board is configured according to the settings made during the installation of the program. The same Control unit number, Address and IRQ must be set at the Control board, see the Administration and technical manual “Hardware installation”.

  • The communication may also fail if there is a conflict between the UNICORN PC Control board configurations and other boards in the PC. If so, select a free Address and a free IRQ during UNICORN installation and at the Control Board, see the Administration and technical manual “Hardware installation”.

The Connection field in the Run data pane in System Control says “NO [3]”.

  • Choose Administration:System Setup in the UNICORN Manager.

    Select the system with problems in the dialog box and click the Edit button.

    Check that the strategy, computer name and the control number are correct according to the installation at the local station which is physically connected to the system. See the Administration and technical manual “System definitions”.

  • If you connect remotely to a system

    check that the local station which is physically connected to the system is turned on

    check that the network is functioning at both the remote and the local station.

  • Check that the limit of eight connections to the system has not been exceeded.

2005-06-15