CConfigScan & CInScan with QUAD08

[Ricky Ooi]

I am having a DAQ device with model QUAD08. I would like to perform Encoder scan for all channels (from Chan 0 - Chan 7). Here are some of my questions:

1. I looked into universal library documentation and notice there is "mapCounter" argument. I am not understand what is the used of this argument and what value should I put if I would like to configure each of the counter channel?
public MccDaq.ErrorInfo CConfigScan(int counterNum, MccDaq.CounterMode mode, MccDaq.CounterDebounceTime debounceTime, MccDaq.CounterDebounceMode debounceMode, MccDaq.CounterEdgeDetection edgeDetection, int tickSize, int mapCounter)

2. What is the correct step to run CInScan for all encoder channel? Is there any parameter I have to pay attention, like ScanOptions, CounterMode, MemData format, etc?

Edited January 5, 2023 by Ricky Ooi

[DAQman]

Hello,

The map channel is used with counter inputs that lack a gate input. A typically situation is when the counter input is configured to measure the time between two signals. The counter input is for the first signal and map channel defines the input of the second signal. For encoder, totalize, period or frequency it's ignored. 

The following KB article show how to configure an input for encoder mode. https://kb.mccdaq.com/KnowledgebaseArticle50793.aspx

Best regards,

John

[Ricky Ooi]

Hi @JRys,

Thank for the code sharing and I got the reading. Just curious what does the reading represent? Is it referring to Number of Encoder Pulse received or other thing?

Based on the diagram below, the reading is obtained when I move my motors. Is there any reason why there is a rebounced in signal when I try to move the motors?

Edited January 6, 2023 by Ricky Ooi

[DAQman]

Hey Ricky,

I can't explain why your plot would jump from a low value to a high value or the other way around. I tested the code in the KB article and did not see this behavior. 

John