Issues with delta HMI

rejoe.koshy

Member
R
Join Date
Dec 2011
Location
kolkata
Posts
195
HI,
I have a delta make HMI (cat no- DOP-B05S101)which is hooked to Siemens s7-200 Plc.Due to some issues with the screen of the HMI, I replaced it with a new HMI (cat no- DOP-B05S111) & then downloaded the program.

For unknown reasons , I am getting a communication 3 error on the HMI.I have checked the configuration parametes several times & found them to be matching with the old one.I am at my wits' end.


Pls help!!
 
BlueAltezza said:
If the communication settings weren't changed, then it should be a problem in the wiring or on the PLC end.
Click to expand...

But the wiring wasnt changed & the old model was working fine with existing wiring.The communication protocol is RS485.Will the wiring be different for different models of HMI??
 
I thought all of the "B" series screens were the same in terms of communications.

They do have some communication notes regarding the S7 in their DOP Communication (page 205) documentation - a suggested delay of 10 to 30. Maybe it's firmware related?
 
BlueAltezza said:
I thought all of the "B" series screens were the same in terms of communications.

They do have some communication notes regarding the S7 in their DOP Communication (page 205) documentation - a suggested delay of 10 to 30. Maybe it's firmware related?
Click to expand...


Thanks- BlueAltezza for the guidance.Can you please direct me to the link for communication manual....would like to go through it in detail.
 
keithkyll said:
The serial port might be locked up on the PLC. Did you power cycle it? Do you still have the old screen to retest?
Click to expand...

Yep, the old screen works fine.All parameters in the new & old are identical except the communication delay settings.

Could the communication delay be the issue??
 

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