DioSetupOutputVoltages

Applies To

GX5055, GX5295, File.

Purpose

Setup the channel output driver high and low voltages.

Syntax

DioSetupOutputVoltages (nHandle, nChannelListMode, nCountOrFirstChannel, panChannelList, nLastChannel, dHiLevel, dLoLevel, pnStatus)

Parameters

Name
Type
Comments
nHandle
SHORT
DIO Master handle, Slave handle or File board handle.
nChannelListMode
SHORT
Channel list mode dictates how nCountOrFirstChannel and panChannelList parameters are used. Channel list mode options are as follows:
0  DIO_CH_LIST_MODE_ARRAY_OF_CHANNELS: The user specifies an array of channels where nCountOrFirstChannel is the number of elements in the list array and panChannelList is an array contains the channels numbers. In this mode nLastChannel is ignored.
1  DIO_CH_LIST_MODE_ALL_BOARD_CHANNELS: Apply the settings to all the board’s channels associated with this board handle. In this mode nCountOrFirstChannel, panChannelList and nLastChannel variavles are ignored.
2  DIO_CH_LIST_MODE_ALL_DOMAIN_CHANNELS: Apply the settings to all the channels in the domain, e.g. if there are two boards in the domain (Master and a Slave), then all 64 channels will be set. In this mode nCountOrFirstChannel, panChannelList and nLastChannel variavles are ignored.
3  DIO_CH_LIST_MODE_RANGE_OF_CHANNELS: Apply settings to a range of channels where nCountOrFirstChannel is the first channel number and nLastChannel is the last channel number. In this mode panChannelList variavle is ignored.
nCountOrFirstChannel
SHORT
If nChannelListMode parameter is set to DIO_CH_LIST_MODE_ARRAY_OF_CHANNELS, then it is specifying the number of elements in the panChannelList array parameter.
If nChannelListMode parameter is set to DIO_CH_LIST_MODE_RANGE_OF_CHANNELS, then it is specifying the first channel number to apply the settings to,
otherwise it is ignored and should set to zero.
Channel number in the DIO domain, each DIO board adds 32 I/O channels. I/O channels number range is 0-991 (1 master and 30 slaves).
Gx5295: Each DIO board adds 4 Auxiliary channels, Auxiliary channels number range is 0-123 (1 master and 30 slaves).
panChannelList
PSHORT
Array of channels numbers. Channels numbers can be from 0 to the last channel in the domain. E.g., if the domain has two boards then the last channel is 63.
This parameter is only used if nChannelListMode parameter is set to DIO_CH_LIST_MODE_ARRAY_OF_CHANNELS, otherwise is should be passed as NULL.
Channel number in the DIO domain, each DIO board adds 32 I/O channels. I/O channels number range is 0-991 (1 master and 30 slaves).
Gx5295: Each DIO board adds 4 Auxiliary channels, Auxiliary channels number range is 0-123 (1 master and 30 slaves).
nLastChannel
SHORT
If nChannelListMode parameter is set to DIO_CH_LIST_MODE_RANGE_OF_CHANNELS, than it is specifying the last channel number to apply the settings to,
otherwise it is ignored and should set to zero.
Channel number in the DIO domain, each DIO board adds 32 I/O channels. I/O channels number range is 0-991 (1 master and 30 slaves).
Gx5295: Each DIO board adds 4 Auxiliary channels, Auxiliary channels number range is 0-123 (1 master and 30 slaves).
dHiLevel
DOUBLE
GX5055:
Output driver high voltage corresponding to logic high voltage settings and range depends on supply rail voltages see comments for details.
GX5295:
Output driver high voltage corresponding to logic high. Voltage can be set from -2V to +7V and must be greater than the output driver low voltage.
dLoLevel
DOUBLE
GX5055:
Output driver low voltage corresponding to a logic low voltage settings and range depends on supply rail voltages see comments for details.
GX5295:
Output driver low voltage corresponding to a logic low. Voltage can be set from -2V to +7V and must be lower than the output driver high voltage.
pnStatus
PSHORT
Returned status: 0 on success, negative number on failure.

Comments

Each channels’ output driver has two level driver, low and high level.
Channels output driver voltages can be read back and set dynamically at any time even while the DIO is running mode.
GX5055:  The total output driver voltage swing (Output driver high voltage less Output driver low voltage) is limited to 24V per channel.
 
Min
Max

dHiLevel

Low Rail Supply +5V

High Rail Supply -3V

dLoLevel

Low Rail Supply +4V

High Rail Supply -7V

dHiLevel - dLoLevel

0.5V

 

E.g. if high rail supply = 18V and low rail supply = -14V then min output driver high voltage >=-11V and max output driver high voltage <=12V.

Example

The following example uses an array of channels list sets output driver high voltage to +4.5V and low voltage to -3.25V:

 

SHORT anChannelList[]={0, 2, 5, 7, 9, 13, 14, 27};

DioSetupOutputVoltages (nHandle, DIO_CH_LIST_MODE_ARRAY_OF_CHANNELS, 8, anChannelList, 0, 4.5, -3.25, &nStatus);

The following example sets all the board’s channels output driver high voltage to +4.5V and low voltage to -3.25V:

DioSetupOutputVoltages (nHandle, DIO_CH_LIST_MODE_ALL_BOARD_CHANNELS, 0, NULL , 0, 4.5, -3.25, &nStatus);

The following example sets all the boards channels output driver high voltage to +4.5V and low voltage to -3.25V:

DioSetupOutputVoltages (nHandle, DIO_CH_LIST_MODE_ALL_DOMAIN_CHANNELS, 0, NULL , 0, 4.5, -3.25, &nStatus);

The following example sets channels 5 to 10 output driver high voltage to +4.5V and low voltage to -3.25V:

DioSetupOutputVoltages (nHandle, DIO_CH_LIST_MODE_RANGE_OF_CHANNELS, 5, NULL, 10, 4.5, -3.25, &nStatus);

 

See Also

DioSetupOutputSlewRate, DioSetupInputLoadResistance, DioSetupInputThresholdVoltages, DioGetErrorString