Function
DA Converts the more than one channel one time, the conversion data are specified in voltage or current. This function supports multi-process.
Format
Ret = AioMultiAoEx ( Id , AoChannels , AoData )
Parameters
Id
[ C, C++ : short ] [ Python : ctypes.c_short ]
Specifies the Device ID retrieved from AioInit function.
AoChannels
[ C, C++ : short ] [ Python : ctypes.c_short ]
Specifies the number of channels to be converted.
AoData
[ C, C++ : float * ] [ Python : ctypes.POINTER(ctypes.c_float) ]
Specifies the address of the array that stores the output data. Please
specify the data in voltage or current.
The available value differs by the device.
Return value
Ret [ C, C++ : long ] [ Python : ctypes.c_long ]
Return values |
Content |
0 |
Normality completion |
7 |
Execute AioResetDevice function because the device has recovered from standby mode |
10001 |
Invalid
Id was specified |
10002 |
AIO
driver can't be called |
13520 |
The value of AoChannels is outside the designated range of the function |
13521 |
Pointer
to AoData is NULL |
20001 |
This function can't be used by this device |
20002 |
Can
not use while by another device works |
23520 |
DA conversion error occurred |
23521 |
The number of conversion channels was exceeded. It is converted on the maximum channels |
Remarks
If a device has the synchronous
output function, it outputs the set channels at the same time.
If the device have no the synchronous output function, it transparently
(one after another output) outputs to the channels in the order of channel
0, 1, 2 and so on.
Before this function is executed, you must
set the output range by using AioSetAoRange
or AioSetAoRangeAll function
This function cannot be used on devices without the analog output function.
If the device is in operation, the function cannot be performed.
When you use this function and "continuous functions", please refer "How to use simple functions and continuous functions at the same time" topics.
Example
It outputs voltage data 5V to channel 0 to channel 7.
C, C++ |
long
Ret; |
Python |
Ret
= ctypes.c_long() |
See also