adccommunitymod (AutomationDirect) asked a question.
Created Date: February 26,2015
Created By: JRS
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I have an EA7-T15C that I plan on connecting to 11 AB ML1400 via DH485. I got most of this working but when one or more PLCs are off can I have an indicator turn on to indicate the comm loss other than the upper banner or Dynamic Text? How can I take the error message and have a tag/indicator for each PLC? I 've tried a bunch of ways to use the errorcodes but can't quite get it correct. Is there a way to use %DEV###% and errorcode to create a tag for each PLC? Since the screen holds the running values when the PLC goes offline there isn't a quick way for operators or even the techs to notice the comm loss. If the screen would refresh to 0 or off values that would work. I am replacing an OPTO22 HMI that had an internal comm loss function per device that worked well. The rest of it was cr$$ though.
Created Date: February 26,2015
Created by: mwdkmpr
I always put a rung in the PLC ladder that turns a bit on. Then have the Cmore either turn on an indicator or activate an event if this bit is off. This will not only monitor the coms but will also work to let you know if the PLC drops out of run mode.
Created Date: February 27,2015
Created by: JRS
I always put a rung in the PLC ladder that turns a bit on. Then have the Cmore either turn on an indicator or activate an event if this bit is off. This will not only monitor the coms but will also work to let you know if the PLC drops out of run mode.
Already doing that via the S:4/6 free running clock bit. It toggles every 0.6 second and will blink an indicator. Depending on scan times the indicator will blink every few seconds. The viewer would have to notice the indicator not blink. The screen will not change state if it can't see the PLC. It holds the last value. At least that is what mine are doing.
What I want is to access the c-more system bit that says comm loss, like what is displayed in the upper banner. But I would like to filter the indicator to individual PLCs so there is a comm loss indicator on the specific device screen. Believe me, operators and techs will ignore the banner. I need an "in your face " indicator or all the PVs to display some kind of fault symbol. This is what iFix HMIs and AB Panelviews among others do.
Maybe I'm missing a c-more setting somewhere.
Created Date: March 05,2015
Created by: JRS
I contacted Tech Support. They confirmed that you can not pick off a single comm fault internally and display it.
So I am using the AB internal RTC to blink an indicator on each device screen.
Oh, well. Maybe a future generation of screens will have this as a feature.
I won't see it. I'll be ending my career at the end of this month after 44+ years.
Created Date: March 06,2015
Created by: HMI Eng
Enjoy your retirement
It is not "ending your career ", it is just shifting into a lower gear. Enjoy!
Created Date: February 26,2015
Created by: JRS
I have an EA7-T15C that I plan on connecting to 11 AB ML1400 via DH485. I got most of this working but when one or more PLCs are off can I have an indicator turn on to indicate the comm loss other than the upper banner or Dynamic Text? How can I take the error message and have a tag/indicator for each PLC? I 've tried a bunch of ways to use the errorcodes but can't quite get it correct. Is there a way to use %DEV###% and errorcode to create a tag for each PLC?
Since the screen holds the running values when the PLC goes offline there isn't a quick way for operators or even the techs to notice the comm loss. If the screen would refresh to 0 or off values that would work.
I am replacing an OPTO22 HMI that had an internal comm loss function per device that worked well. The rest of it was cr$$ though.