• June 01, 2023, 06:22:15 PM

Login with username, password and session length

Author Topic: ECOM, Ethernet SW, Two Cmore Touchscreens  (Read 3336 times)


  • Newbie
  • *
  • Posts: 1
ECOM, Ethernet SW, Two Cmore Touchscreens
« on: August 28, 2007, 12:06:05 PM »
I am in the planning stages of a project which requires two touchscreens to be linked to a D4-450 PLC. Im thinking of connecting the two screens to an ECOM module via an E-SW05 Ethernet switch. Do you foresee any problems or special considerations with this araingment?


  • Host Moderator
  • Hero Member
  • *****
  • Posts: 253
    • Host Engineering, Inc.
Re: ECOM, Ethernet SW, Two Cmore Touchscreens
« Reply #1 on: September 17, 2007, 02:45:27 PM »
you shouldn't have any problems with two c-more connected to a single ecom (or ecom100), a reasonable limit is somewhere around 5 or 6 panels per ecom.

the issue is more one of acceptable performance than functionality. the single biggest point of concern is the plc scan time because the ecom only gets one opportunity per scan to process it's comm requests and the plc will only accept one type of request (either a read or a write) at a time.

so you can see there will be a direct correlation between the plc scan time the responsiveness of the data through the ecom to the c-more panels.
Good design costs a lot. Bad design costs even more.