Jump to content

Welcome to Geeks to Go - Register now for FREE

Geeks To Go is a helpful hub, where thousands of volunteer geeks quickly serve friendly answers and support. Check out the forums and get free advice from the experts. Register now to gain access to all of our features, it's FREE and only takes one minute. Once registered and logged in, you will be able to create topics, post replies to existing threads, give reputation to your fellow members, get your own private messenger, post status updates, manage your profile and so much more.

Create Account How it Works
Photo

COM ports


  • Please log in to reply

#1
nascar38

nascar38

    New Member

  • Member
  • Pip
  • 7 posts
I need to change a COM port on my laptop. I'm trying to program a PLC and it will only transfer the program using COM1 or COM2. I don't have a serial port therfore I have to use a port replicator and it defaults to COM4. I can't tell what is using COM1 or COM2 to change one of them to COM4. I do know my modem is using COM3 :whistling:
  • 0

Advertisements


#2
vally

vally

    Member

  • Member
  • PipPipPip
  • 573 posts
right click on my computer-> properties go to tab hardware -> device manager.
open ports (com & lpt)
doubble click on Communications port - it shuould say what port it is in brackets.
click on port settings tab -> advanced
on the bottom COM Port Number -now pick you'r poision.
good luck
  • 0

#3
nascar38

nascar38

    New Member

  • Topic Starter
  • Member
  • Pip
  • 7 posts
It doesn't show anything for any COM Port only when I plug in the port replicator then it shows COM4. I did try to change the port to COM1 or COM2 but they both say they are being used. That's what I meant by saying I can't tell what's using COM1 or COM2. Thanks for you input though Vally.
  • 0

#4
Neil Jones

Neil Jones

    Member 5k

  • Member
  • PipPipPipPipPipPipPipPip
  • 8,476 posts
COM3 and COM4 are virtual COM ports.
It may well be that the laptop does have COM ports that aren't accessible from the outside - have a poke in the BIOS.
  • 0

#5
Tyger

Tyger

    Member 2k

  • Member
  • PipPipPipPipPip
  • 2,896 posts
Neil Jones is right, you may need to enable the com ports in the BIOS, also you may have connections for them on the mainboard but need to install the connectors to go to the outside world. You can also get PCI cards that have serial ports on them as add ons.
  • 0






Similar Topics

0 user(s) are reading this topic

0 members, 0 guests, 0 anonymous users

As Featured On:

Microsoft Yahoo BBC MSN PC Magazine Washington Post HP