text: <s>[INST] Pf40 port and mod cycling red When powering up drive. There is no comms enabled. The comms is via devicenet. Replaced comms card and drive but problem is still there, Any ideas on the solution for this ? [/INST] You'll need to connect to the drive using Connected Components Workbench or DriveExecutive to get more information. https://literature.rockwellautomation.com/idc/groups/literature/documents/um/22comm-um003_-en-p.pdf According to the 22-COMM-D manual, page 8-2 (96 of the PDF) a flashing red PORT light means: The adapter is not receiving communication from the drive, connected drive is faulted, or a drive is missing in Multi-Drive mode. Fixes for this include: Clear any drive faults. Verify that cables are securely connected. Cycle power to the drive. On the next page, a flashing red MOD light means: The adapter has failed the firmware test, connected drive is faulted, or a drive is missing in Multi-Drive mode. Fixes for this include: Clear faults in the drive. Cycle power to the drive. If cycling power does not correct the problem, the parameter settings may have been corrupted. Reset defaults and reconfigure the module. If resetting defaults does not correct the problem, flash the adapter with the latest firmware release. For Multi-Drive mode, determine which drive is missing or faulted. Check cabling and configuration settings (see Configuring the RS-485 Network section in Chapter 7). Since both lights flashing would seem to indicate a multi-drive mode, does this point you in the right direction? Is this a multidrive application? \\n </s>