The total number of data link packets that the H1 card had to retry. If this statistic is steadily increasing, check the communication statistics for each device to see which device is causing the problem. To check communication statistics on a device, right-click the device, and then select Display Communication Statistics. The number of retries to a fieldbus device generally should be much less then 1% of the total requests sent to the device. If this is not the case, either the device is bad or there is a network problem.