[Moving Local Tags]

Joe E’s Method is good. Doing a control f and replace all would be much quicker. As long as you and ensure the tags being replaced are the ones you want

[Data Types for MAM instruction]

Copying a real to a dint isn’t gibberish. It’s an IEEE 754 conversion. I agree with you on the rounding error from float to dint when you mix data types. However a copy will convert the data type. I’ve had to do this for drives on devicenet. Get the reference I want as a real, copy to a DINT, send the DINT to the drive, the drive (750 in this case) would convert back to a real. You can look on knowledgebase. Many technotes on it. Or just look up the IEEE conversion. I probably went on a tangent from your question but just wanted to say I’ve had to convert before. In your specific case, if you put a DINT tag into a tag looking for a real, I believe it just adds .00 to it. Devicelogix does that. And vice versa, I believe logix would truncate a real if put directly into a dint 

[Data Types for MAM instruction]

Moving a data type into a different one will treat it as such. So a DINT 60 will be treated as 60.0 real. However. If you do a copy COP command, logix will do an IEEE 754 conversion from float to dint or vice versa

[AB Studio 5000 Lite]

What version of studio? Updating the AOP might help

[Communication]

@ElectronGuru  you’re correct that the speed reference the drive is pointing to probably can’t be changed while the drive is running but by understanding the io image, you can ‘change’ the speed ref on the fly by writing to the logic command to point to a new reference. 
 

I agree that ample testing should be done before changing a live system. Sounds risky in any manner

[AB Studio 5000 Lite]

If you email radrivessupport@ra.rockwell.com, they usually respond in 24 hrs. Worth a shot

[Communication]

@ElectronGuru the second bullet point would stop the process. It sounds like this isn’t acceptable. Would it be easier to send a reference from the micrologix to the compact logix then do an online edit to redirect the data from the micrologix? 

[CompactLogix Point I/O Module Limits]

It’s been a while since I looked but Rockwell had an enet resource tool to build your system and test if the hardware would support the number of connections. Look on their IA site

[Communication]

If you have some free outputs on the drive, you can make a clever speed select with parameter control on a DO wired to a DI to choose a speed select of parameter 38. I’m not completely understanding what needs to be done. An MSG is pretty simple if you’re sending a new reference 

[After replacing PowerFlex 70, the HIM is blind???]

All powerflex 70s can use 20 him -xx. Even new A6 hims. Blank face is just a blank plate that comes with the drive as a place holder. If the him is not backlit then the power from the mcb is not powering the him. Are you using port 1 on the drive or a remote him? If the him is backlit but not logging in, make sure it it at the latest fw or flash the 70 back to the one replaced

[1756-EN2T Anomalies]

Other than the obvious of divide and conquer through the network, there may be an issue with the new Mac and the ip compared to what the switch has in its Mac table. Try the en2t in the same slot with a new IP. This would tell me there's a mac issue in the switch. 

[Run Powerflex 525 from keypad?]

Mismatch cp just means the control pod was changed. Reset this. Set the motor data and your other parameters and you will be ok. Try not to go more than 2x drive size or the drive can’t protect the motor 

[N-files powerflex 525]

If you set up a datalink, you can read the n file like the reference or feedback. This is shown in the user manual

[How do I find out if a poweflex vfd LP or HP?]

Hi power 755 are frame 8-10. Everything else is low power. From rslinx, it will say hi pwr in the name. LP won't show in rslinx, it'll just say PowerFlex 755. For control flash - LP is low power and HP is high power

[Powerflex 755 Net I/O Timeout]

I would look into the switch settings. 

[PowerFlex 755 F12 (HW OverCurrent)]

F12 on a 755 is caused by 2x drive rated current outputted for longer than 8 us. It is important to know when this occurs. On start or while running. If there's and encoder installed, try running open loop. A failing encoder may cause this. Also, starting into a rotating load without flying start on. This is also caused by motor winding shorts, but probably not your case if you have many drives doing this. 

[PowerFlex fault history]

CCW also has data logging to record data over time or trending which is in graph form and much faster sample. Or saving a techsupport wizard will also show you fault and alarm history. If the event occurs and there is no fault, it's likely the run or stop command was removed

[Auto assign IP PowerFlex 525]

The stratix 2500 supports dhcp persistence so yes you can auto assign an IP address 

[Auto Download Configuration - compatible with vlans?]

The switch feature is called DHCP persistence. Most managed switches have it. ADC only triggers after a successful PLC connection. The IP and device type must match what is in the PLC. ADC will work across a VLAN (assuming the plc is on a different network than the drive) if the NAT settings are set up in the PLC

[Powerflex 755 Net I/O Timeout]

Network issues are never easy. Some questions.. Do the drives only fault when they are running or idle too?  Does the fault randomly change to any of the drives or is it mainly 1? Have you tried isolating a drive or bypassing the switch?

[SAFE Torque OFF Status]

527’s don’t have parameters.