Get-OfflinePrinter.ps1

function Get-OffilnePrinter
{
    [CmdletBinding()]
    [OutputType([int])]
    Param
    (
        # Param1 help description
        [Parameter(Mandatory=$true,
                   ValueFromPipeline=$true,
                   ValueFromPipelineByPropertyName=$true,
                   Position=0)]
        [string[]]$ComputerName
    )

    Begin
    {
        Write-Verbose -Message "[BEGIN] Function Starting"
    }
    Process
    {
        foreach ($computer in $ComputerName)
        {
            if (Test-Connection -ComputerName $computer -Count 2 -Quiet)
            {
                Write-Verbose -Message "[PROCESS] $computer is online , querying it"
                #Take a look at the MSDN documentation why the below filters are used
                Get-WmiObject -query "Select * From Win32_Printer WHERE (PrinterStatus='7') OR (ExtendedPrinterStatus='9')" -ComputerName $computer 
            }
        }
    }
    End
    {
        Write-Verbose -Message "[END] Function Ending"
    }
}