boblev

Yes, we've been working with Bob Vallee around availability of the DT series USB units that still support the DT-open layers software (we use the Active X interface in our in-house software applications). We realize that the newest USB units do NOT support DT-open layers and thus have been focusing on the older ones to avoid major rewrites for our software applications. We just bought our DT9804 a few weeks ago but didn't realize this limitation with simultaneous functions until we started using it. At the time we placed our order, the DT9834 was not available. However, Bob V has recently told us that it is expected to be back in stock in July. Thanks for your response and help. Bob L

With our newly purchased DT9804 we ran into the problem that it does now allow single value digital input/output and/or analog output when the A2D subsystem is running (in channel scan mode). We submitted a question to the forum and you confirmed this limitation. Looking at the documentation for the DT9834, it does not mention this limitation. Can you let us know which kinds of single value input and output are available on the DT9834 when the A2D subsystem is running in channel scan mode. Thanks in advance for your help with this. Best wishes, Bob

Fausto, Thanks for the additional information (and the definitive test you ran with QuickDataAcq). I don't think we could switch to using the single value analog input in our application (timing and overhead problems), but will give it a try. In the meantime, I was looking at the documentation for the DT9834 and I didn't see mention of similar limitations. Originally, this was the unit we were going to purchase, but Bob Vallee told us it is on backorder (estimated availability in 12/2023). Can you confirm whether the DT9834 does allow single value digital input/output and/or analog output when the A2D subsystem is running (in channel scan mode). We're going to be building several of these systems over the next year or so and may want to wait for the DT9834 to become available if it would allow us the additional capability. Thanks in advance for your help with this. Best wishes, Bob

I'm trying to get digital input and output and analog output working on my DT9804 using the DT-Open layers library while using software triggered A2D scanning. According to the manual, for digital input, you cannot use single-value operations while an analog input scan is in progress. However, I was able to read the digital input values from A2D channel 16, so that's working fine. For digital OUTPUT, the option of using something like A2D channel 16 does not seem to be available and the manual does not explicitly state whether single value digital output is possible when also using triggered A2D scanning. Can you tell me whether single value digital output is possible under these conditions? Finally, it appears that there is no way to use the analog outputs during triggered A2D scanning. Is there any workaround for this? Thanks!