R60DA8-G & R60DAI8 ISSUES

[FRANK RUIZ 2]

Hello all,

We’ve been having some issues with Analogue Output cards (R60DA8-G and R60DAI8) on some projects we’ve been doing and wondered if you could help.

 

On one site where we are using the R60DAI8 we have the following issues:

• when a valve is failing on site (wired to the first analogue output channel) the ERR LED comes on for the disconnection detection error, should this error come on with a valve failure/instrument failure or should this be for physical disconnection only?

• Also, site are reporting that the other valves analogue outputs on the card stop working when this happens. We have had a response previously from Mitsubishi support suggesting that this shouldn’t happen (basically they pointed to noise), could be wiring or it could be caused by external noise. Would replacing the R60DAI8 with an R60DA8-G resolve this issue?

 

General issue for both R60DAI8 and R60A8-G:

• When the Disconnection Detection Error is no longer present the ERR LED is still on so we have had to issue a reset to the “Error clear request” bit of the card (YF) to clear the error (currently a manual action from the HMI). Is there a way that this can auto clear when the detection error is no longer active? The only other way we can see to make this clear automatically is if the card has an error we could periodically issue the “Error clear request”, is there any issue with doing this if there’s no way to set the card to auto reset?

• The R60DA8-G has a detection auto-clear enable/disable setting but only has 100 times and from the manual this suggests a 100ms period between resets, so does that mean it only checks to auto-clear for 10 seconds the ERR LED is on and requires the “Error clear request”?

 

Any help with this matter would be much appreciated.