Here is a clean and simple PowerShell script to ping all the computer accounts in an Active Directory OU, and return the Name, IP Address and any errors into a csv file.

# Enter CSV file location
$csv = "C:\Script_Files\OUPing.csv"
# Add the target OU in the SearchBase parameter
$Computers = Get-ADComputer -Filter * -SearchBase "OU=Servers,DC=mydomain,DC=com" | Select Name | Sort-Object Name
$Computers = $Computers.Name
$Headers = "ComputerName,IP Address"
$Headers | Out-File -FilePath $csv -Encoding UTF8
foreach ($computer in $Computers)
{
Write-host "Pinging $Computer"
$Test = Test-Connection -ComputerName $computer -Count 1 -ErrorAction SilentlyContinue -ErrorVariable Err
if ($test -ne $null)
{
    $IP = $Test.IPV4Address.IPAddressToString
    $Output = "$Computer,$IP"
    $Output | Out-File -FilePath $csv -Encoding UTF8 -Append
}
Else
{
    $Output = "$Computer,$Err"
    $output | Out-File -FilePath $csv -Encoding UTF8 -Append
}
cls
}