User`s manual

CYDAS UDR Library User’s Guide Analog Input Boards - UMDAS 0802 Series

Concurrent operations

UMDAS 0802L: Concurrent operations are not allowed. If you invoke a UDR Library or UDR Library for

.NET function on a UMDAS 0802L while another function is running on that same unit, the

ALREADYACTIVE

error is returned.

UMDAS 0802: The following table lists the concurrent operations supported by the UMDAS 0802.

UDR function/method Can be run with…

cbAOutScan()/AOutScan()

 cbDOut()/DOut()

 cbCLoad()/CLoad()

 cbFlashLED()/FlashLED()

cbAOut()/AOut() cbAInScan()/AInScan() in BACKGROUND mode

cbAInScan()/AInScan()

All supported digital I/O functions (cbDIn()/Din(), cbDBitIn()/DBitOut(),

cbDOut()/DOut(, cbDBitOut()/DBitOut(), cbDConfigPort()/DConfigPort())

Channel-gain queue

When using

cbALoadQueue()/ALoadQueue() with the UMDAS 0802L, the channel gain queue is limited to

eight elements. When using

cbALoadQueue()/ALoadQueue() with the UMDAS 0802, the channel gain queue

is limited to 16 elements.

The queue accepts any combination of valid channels and gains in each element.

Analog output (UMDAS 0802)

When you include both analog output channels in

cbAOutScan()/AOutScan(), the two channels are updated

simultaneously.

Miscellaneous functions and methods supported

UDR:

cbFlashLED()

UDR for .NET:

FlashLED()

Causes the LED on a USB device to blink.

When you have several USB devices connected to the computer, use these functions to identify a particular

device by making its LED blink.