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.
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...
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).
Does anyone have any real life experience with VFD's that are bad in terms of dv/dt switching, and that are paticularly hard on motors. I ask because I am looking for a drive to test inverter duty magnet wire for inverter rated motors. The drive should be 575V and available in the USA. In the...
Would anyone on this board feel uncomfortable using an ATEX Zone 1 and Zone 2 approved tethered (wired) barcode scanner in a North American Class I, Division 2 classified area?
I need help identifying and finding documentation on a power factor correction controller.
It is marked with the following:
"GEC Measurements" and "NOVAR 200"
Model # NV26S6D002
Serial # 26338W
Wiring Diagram # TT9022
Does anyone recognize this controller? Where can I find a user's manual...
I have six Anafaze 8LS controllers I want to communicate with from my SLC500 5/05 RS-232 port using an RS-232/RS-485 converter. Has anyone ever done this? Any tips?
Anyone care to guess, or have some tool, to estimate the temperature rise that will result from operating a non-inverter rated induction motor at less than base speed from an inverter supply?
I have:
5HP motor, 1750RPM, 184T frame, 230V/3/60, 87.5% Eff (at full load), NEMA design B, open drip...
I want to install a subpanel off of an existing panel. The subpanel will feed three combination loads.
The existing panel is fed by 3-350mcm feeders per phase. The tap conductors will be 2-250mcm cables per phase, and will be bolted to the existing panel bus bars. The subpanel will be...
I am using Borland C++ v.4.51. I want to execute something every 0.10 sec. How can I use the "data_time.ti_hund" command to do this. Does this command count in 0.010 (0-99 to the machine) second intervals?
I have tried:
hund_time = data_time.ti_hund;
if (hund_time==1)...
I am running Microsoft Project 98 SR-1 on Windows 2000. When I try to do a "Save as" from the File menu I get an error message instead of the "Save as" dialog box. The error message is: "There is not enough memory to display the Save dialog box." In the error...
I am running Microsoft Project 98 SR-1 on Windows 2000. When I try to do a "Save as" from the File menu I get an error message instead of the "Save as" dialog box. The error message is: "There is not enough memory to display the Save dialog box." In the error...
I have an electrical system which consists of a delta-wye connected transformer supplying a delta connected load. One corner of the delta is grounded. I have the following load current measurements:
I leg1 = 1115A
I leg2 = 1000A
I leg3 = 1092A
Can someone tell me where the unbalanced current...
I have tried nearly every Board Address setting in the RSLinx 1784-PCMK device configuration dialog box and all of them seem to conflict with other addresses used by the computer. Also, no matter what I set the Board Address to, when I reboot the Board Address always goes back to EC00.
PC...
I have an application where (10) 350mcm cables are arranged on 1" centers in an open wire tray. All 10 cables carry one phase of a three phase delta connected load. The total phase current is 2200A. When I measure the current on the individual conductors I get readings of 150A on the...
