Alarm monitoring device 513-20011A

mercuryEthernetPROFINET

EtherTAP2 enables the passive monitoring of Industrial Ethernet traffic. It cuts down the equipment needed for network analysis because you use only an Atlas, Mercury or PC and one EtherTAP2. Passive diagnostics Cycle time per device Positive and negative message jitter Number of dropped packets Alarm triggers The EtherTAP – Message Analysis feature allows you to do deep analysis of PROFINET traffic by placing an EtherTAP between devices exchanging PROFINET traffic (usually between a Controller and the first switch). To make tapping available make sure you have: A correct license An EtherTAP placed between two devices communicating over PROFINET A running measurement Network overview and device details When you click the tile on the Dashboard you can read out four types of data: The cycle time per device PROFINET devices send data on a very periodic basis, these are called cycle times. Cycle times are defined in milliseconds. Positive and negative message jitter as a percentage of the cycle time Jitter is the deviation of a message from the intended cycle time. Example: if a device sends a message every 4ms, then a delay of an additional 4ms leads to a jitter of 100%. In case the message is 1ms early then a jitter of 25% is being reported. Both messages which are early and late are reported in absolute percentages.