Internet PLC Forum

I updated a computer up to the current version of the programming software. I see the manual for 6.2 but the current version is higher. I suspect it comes on the CD.

Thanks.

I need to drive 2 small DC motors with the PWM outputs on a nano. No problem using the 24VDC output as shown in the manual, but I need more speed.

I would like to drive the motors using 48VDC. Is there any problem using the PWM output in the same way with the other side of the motor supplied by the +48VDC and the PWM output providing the low side?

Current would be less than 2 amps. I would tie the grounds for the to power supplies together.

I know I can do it several more complicated ways, but I have 16 motors to drive and want to keep it simple.

I have a couple of T100MD2424+ boards that I would like to check out.

1. Do you have test program that checks out operation of the bare board with all extrnal I/O devices disconnected?

2. If I have a board that is "bad" can I send it to you for repair and if so, how do I do it. The boards are out of warranty.

Thanks

I am setting up Nano 10 for programming via RS 485 to U485 USB converter.

Instructions show 120 ohm terminating resistor across RS 485+ and RS485- lines. Is this needed when U485 converter and Nano 10 are only devices on RS-485 lines?

In addition RS-485+ is pulled up to +5VDC by 1k resistor and RS-485- is pulled down to ground by 1k resistor  are these both needed for only U485 and Nano 10 on RS-485 lines?

Also is there a Ladder+Basic programmer?s reference for the Nano 10 ?

I have an application that uses a 1200  line encoder and drive wheel measuring speed in FPM. The HSC is fast enough that it registers the minor variations in speed due to mechanical limitations of the machine. I am looking for a simple way to average the pulsefrequency over a group of samples to an average value.

I looked in the samples and did not see anything that would do this.

I am thinking some type of for/next loop that loads a series of values into memory and then averages that group of values on a regular basis.

Thanks

I am using this F2424 for the first time. The display is working fine but I am not seeing the keypad inputs when pressed using online monitoring. I am using the same key routine from your samples that I have used with the T100MD2424+.

I see no mention to the base address for the F2424 when using the MD-HMI Am I correct that it is the same as the T100MD2424+ ?

The zero key starts at input 25 and input 40 is the last input for the F4 key.

My program works fine in simulation, just not with the hardware.

Possibly I have a hardware problem with the keypad that does not effect the LCD?

Thanks

I have an application where I count pulses from two photo cells (on two separate measuring wheels) with a T100MS2424 on a regular inputs with a standard counters (not HSC) It works well up to a certain speed but over that speed is losing counts. I have verified this using a frequency counter direct on the input line from the photocell.  I am using 2 channels for frequency measurement for another part of the machine so I don?t have 2 HSC channels to use to resolve it.

The question is: The counter is on a rung with the photocell input incrementing the counter. I do not have a special bit say .01 seconds to force the counter to be serviced. I have assumed that I don?t need one since the counter will be incremented whenever the input changes state.  Am I correct here?

I have thought of changing to the new F2424 board since it seems to have the ability to use 2 HSC and 2 frequency measurements on input at the same time. Is that correct? If I change to this board will the program run on the F25 from the older board? I see some input pin locations are different, but most else is the same.
Ideas will be appreciated. thanks