text: <s>[INST] PowerFlex 70 not using the speed ref from the PLC Summary: The drive shows that the Ref Owner is DPI Port5 but the drive ramps up to 60hz anywayThe plant was recently hit by lightning and there was an AB 1336 Plus running a pump. The PLC was sending the speed reference to the 1336 via an different R I/O card. We upgraded to a Powerflex 70 with a 20-Comm-R card for Remote I/O communications. The new PF70 was installed with appropriate pump parameters. Also the following parameters were set: P90 (spd ref A Sel) set for 22 (DPI Port5), P274 and P276-285 (all set for bit 5 'DPI Port5'), P361-P366 (Dig inx) all set to '0'. The drive starts/stops when the PLC tells it to. There are no hardwired inputs. The problem is that even though the P292 (Reference Owner) shows as DPI Port 5, the drive ramps up to 60Hz (or whatever P82 is set to) even though I see P275 varying the way same as the PLC discrete output word. However P2 (command Freq) shows whatever is in P82 (Max Speed). Can anyone see a problem in this? I've been scratching my head a lot on this one and its starting to hurt. Any help would be appreciated. Thanks in advance for any support. [/INST] Hello, Looks to me like its not taking the Commanded Speed, Are you sending block transfer message to the drive? I wonder if something is missing on the adapter, Could you check the chapter #3 and make sure it's not disable. http://literature.rockwellautomation.com/idc/groups/literature/documents/um/20comm-um004_-en-p.pdf \\n </s>