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For what it's worth, I have used Baldor, ABB, AB, and Delta drives in a facility with both 230V and 460V, delta connected, ungrounded substations. I have used the said drives on both voltages. I have not had any drive failures related to the delta connected substation nor have I had to make...

Are the inverters grounded via the enclosure sub-panel or is there a an actual ground conductor? In my opinion, all devices in an industrial control panel should never utilize the sub-panel or enclosure as the grounding path. To do so opens the door for common mode noise and stray voltages...

you could probably get the icons from the original installation CD's. They usually have an icon file in the CD root directory.

In my startups I've found the most comforting action is to close and lock the panel doors, clear the room, and throw the big switch. Common sense checks prior to powering up should be done, of course.

Thanks djs for the clear answer.

I have two devices: Device #1 - Honeywell UDC3300 with Modbus RTU protocol Device #2 - Newport iSeries with Modbus protocol Are these two devices compatible on the same network? Is "Modbus RTU" different from "Modbus". Both use the RS-485 physical layer.

Thanks rraghunath and kiribanda. Most helpful.

I'm not exactly what you mean by handheld radio remote, but mayber Intermec, Symbol, or LXE has something. All three make I/S products for hazardous environments.

You could use any brand of two-position, maintained, selecter switch with three contact blocks containg one Normally-Open and Normally-Closed contact per block. For appearance, mount the switch in a small and cheap enclosure available from the likes of Allied or Newark electronics. For cable...

With a 30:1 gearbox the reflected inertia from the gearbox output shaft to the motor shaft will be very low. The load will most likely "wind down" very quickly if there is and amount of mechanical damping in the system on the load side. The motor stops producing torque as soon as the power is...

I am currently designing an electrical distribution system for a plant to be built outside of the U.S.A.. The nominal network voltage is to be 380V/3/50. The motors and other devices being specified for the plant are 380/400/415V rated (basically IEC stuff). My question is this, would it be...

DASKAT, yes it is a ProSoft card. The UDC3300 addresses of interest are the loop 1 and loop 2 present value, to start. I have the ProSoft and Rockwell generic examples for using the ProSoft card, I was hoping to find something more specific to the UDC3300 application.

The PLC has timer functions, among many others. I'm certain it can handle this application. Via the I/O, you could interface nearly any external control system with the PLC. PLC manufactuers do offer touchscreen displays, but that starts to add considerable expense.

If you are not measuring flow, no analog I/O will be required. Digital I/O is all that you need. To build your standard PLC you need: Rack Power Supply Processor 1 8-point digital input (I assume you need to start/stop the process, i.e. a switch of some type needs to interface with the PLC...

The values from the Recorder may be in Hex, even when reading the Floating Point registers. Thus, going directly to the F8:0 register is not possible?

Does anyone have any ladder logic they can share with me for communicating between an MVI56-MCM module in a ControLogix platform to Honeywell UDC3300 controllers (modbus).

Isolation improves common mode noise rejection. Stay isolated if possible.

I am using the MVI56-MCM as master to several Honeywell UDC3300 controllers. Do either of you have ladder logic that you could share with me that may help?

The bandwidth may not be a problem, the quality of service may. Maybe unsolicited messaging from the devices to RSLinx would solve the problem?

Prosoft also offers wireless radio communications, not just Ethernet protocol.