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    How to set InitVar (health check) parameters for a MODNET driver device type in PowerSCADA Expert

    Issue
    How to set InitVar (health check) parameters for a MODNET driver device type in PowerSCADA Expert

    Product Line
    Powerlogic SCADA 7.2x
    PowerSCADA Expert 7.3x
    PowerSCADA Expert 7.4x

    PowerSCADA Expert 8.x

    Cause
    If a MODNET device fails to come online in PowerSCADA Expert (PSE), one likely cause is that the default InitVar parameter that the driver is using as a health check is not compatible with the device type. In this scenario, it may be necessary to add/modify the appropriate InitVar parameters.

    Environment 
    Computer Setup Editor

    Resolution
    In the Computer Setup Editor, the following parameters can be added to the Citect.ini file:

    InitVar
    Address of the register to read at startup to confirm connections.

    Allowable Values: 0 - 65535
    Default Value: 40001

    The address can be provided in two ways:

    1. With configuring InitVarType ini parameter 
    InitVar must have the register address and InitVarType must provide the register type. InitVar will be able to support the values 0-65535.

    Example:
    [Modnet]
    InitVar = 39000
    InitVarType = 3

    With this configuration during start-up and re-connection the driver will attempt to read Output Register 39000

    2. Without configuring InitVarType ini parameter 
    InitVar must have the complete address including the register type. InitVar should be configured as format FR.

    F : Register type (range : 1-4, 1-Digital read input, 2-Digital read output, 3-Integer read output, 4-Integer read input)
    R : Register address (range : 0-9999)

    Example :
    [Modnet]
    InitVar = 12345

    By default, InitVarType will be assigned value 0.

    With this configuration during start-up and re-connection the driver will attempt to read Input Coil 2345.
    With this parameter, you can set different values for specific I/O devices or groups of I/O devices

    InitVarType
    The type of register the MODNET driver tries to read on startup to allow communication to start. It is configured with the parameter InitVar.

    Allowable Values: 0 to 4, or 20 (for extended registers access)
    Default Value: 0

    Parameter details:
    1 - Digital read input
    2 - Digital read output
    3 - Integer read output
    4 - Integer read input
    20 - Extended register
    0 - the value defined for the parameter InitVar will be considered a complete address, having register type.

    Example:
    [Modnet]
    InitVar = 39000
    InitVarType = 3

    With this configuration during start-up and re-connection the driver will attempt to read Output Register 39000
    With this parameter, you can set different values for specific I/O devices or groups of I/O devices.

     

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