Address Conflict Detection (ACD)
The Anybus CompactCom 40 PROFINET IRT IIoT Secure supports Address Conflict Detection (ACD). This mechanism involves the following two aspects:
Initial probing: before using an IP address, the module issues ARP probes to see if the address is already in use (three probes with a 100 ms delay).
Address announcement: after the initial probing, the module issues ARP announcements.
If an IP address conflict is detected, IP address error will be indicated on the Network Status LED. The module will use address 0.0.0.0. A new address can be configured via the Anybus IPconfig tool.
Important
If Fast Start Up is used, ACD initial probing is automatically disabled to ensure a fast startup. Address announcement is still used, as it will not affect the actual startup time.
To enable/disable ACD, seeEthernet Host Object (F9h).