Diamond Prometheus/Athena/Athena II Analog Output (D/A) - Prometheus/Athena Analog Output block

Library

xPC Target Library for Diamond

Scaling Input to Output

Hardware Output	Block Input Data Type	Scaling
Volts	Double	1

Block Parameters

Channel Vector

Enter a vector of numbers between 1 and 4. This driver allows the selection of individual D/A channels in any order. The number of elements defines the number of D/A channels used. For example, to use the first and second analog output (D/A) channels, enter

[1,2]

Number the channels beginning with 1 even if the board manufacturer starts numbering the channels with 0.

Range

From the list, choose a voltage range. The output range applies to all channels. This range must agree with jumper settings in block J13 on the board.

Reset vector

The reset vector controls the behavior of the channel at model termination. Enter a scalar or a vector that is the same length as the channel vector. If you specify a scalar value, that setting is used for all channels. If you specify a value of 1, the corresponding channel is reset to the value specified in the initial value vector. If you specify a value of 0, the channel remains at the last value attained while the model was running.

Initial value vector

The initial value vector contains the initial voltage values for the output channels. Enter a scalar or a vector that is the same length as the channel vector. If you specify a scalar value, that value is the initial value for all channels. The channels are set to the initial values between the time the model is downloaded and the time it is started.

If you provide an out-of-range value for a channel, that value is adjusted to be within the range defined by the parameter Range.

Show error status output port

Select this check box to display real-time error information. This check box displays an output port labeled E. As long as no error is detected on any of the channels currently in use, this signal has a value of 0. Values of 1, 2, 4, 8, and so forth respectively indicate problems on channels 1, 2, 3, 4, and so forth. To use one signal to indicate errors on multiple channels, the driver combines these values. For example, the E value 1 + 2 = 3 encodes the concurrent errors on channels 1 and 2, the value 2 + 4 = 6 encodes the concurrent errors on channels 2 and 3, and so on.

Sample time

Base sample time of a multiple of the base sample time.

Base address

Enter the base address of the board. It is important that this entry correspond to the DIP switch settings on the board. For example, if the base address is 280 (hexadecimal), enter

0x280

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