Forums.MrPLC.com > Another PIC driver issue

Forums.MrPLC.com > PLCs and Supporting Devices > Allen Bradley

trn_psycho

Oct 12 2006, 01:26 PM

OK, is it a documented problem that the PIC driver will only allow me to choose between com ports 1-4? Whereas the DF1-RS232 driver lets me choose any of them?

Mickey

Oct 12 2006, 05:09 PM

QUOTE(trn_psycho @ Oct 12 2006, 01:26 PM) [snapback]41617[/snapback]

OK, is it a documented problem that the PIC driver will only allow me to choose between com ports 1-4? Whereas the DF1-RS232 driver lets me choose any of them?

Curious, why is that a problem?

Contr_Conn

Oct 12 2006, 07:17 PM

QUOTE(trn_psycho @ Oct 12 2006, 02:26 PM) [snapback]41617[/snapback]

OK, is it a documented problem that the PIC driver will only allow me to choose between com ports 1-4? Whereas the DF1-RS232 driver lets me choose any of them?

Because real serial ports always COM1-COM4.
PIC driver does not work with virtual ports

OZEE

Oct 13 2006, 07:17 AM

IIRC, the old software that used this really worked off of the IRQ's rather than the COM ports. The virtual ports don't have the "right" IRQ's for the software to know where to find the PIC.

trn_psycho

Oct 13 2006, 07:23 AM

It's not a big deal, I just noticed that I can't use a usb to serial port addaptor because it comes up as com port 10 on my laptop. However, the same device CAN be used as RS-232 - DF1 or RS485 -DF1. Just wondered why that was.

TWControls

Oct 13 2006, 09:09 AM

QUOTE(Contr_Conn @ Oct 12 2006, 08:17 PM) [snapback]41628[/snapback]

Because real serial ports always COM1-COM4.
PIC driver does not work with virtual ports

You can't use USB to Serial adapters with the PIC. You need to get a 1747-UIC

BobLfoot

Oct 13 2006, 06:16 PM

Need to be careful when picking a PCMCIA to Serial adapter as well, not all of them allow you to control the Memory Address and IRQ. This is critical for some older software programs which look only for the old IBM AT Standard Ports and IRQ's.

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