Digital Input Operations

Chapter 4 Features and Functions

The multifunction module (34907A) has two non-isolated 8-bit input/output ports which you can use for reading digital patterns.

You can read the live status of the bits on the port or you can configure a scan to include a digital read.

•The digital input channels are numbered “s01” (lower byte) and “s02” (upper byte), where s represents the slot number.

•You can generate an alarm when a specific bit pattern or bit pattern change is detected on an input channel. With the multifunction module, the channels do not have to be part of the scan list to generate an alarm. For more information, see “Using Alarms With the Multifunction Module” on page 130.

•When you add a digital read to a scan list, that port is dedicated to

the scan. The instrument issues a Card Reset to make that port an

input port (the other port is not affected). While included in the scan list, you can still perform low-level read operations on the port, but you cannot perform write operations on the port.

•From the front panel, you can read data from only one 8-bit input port at a time. From the remote interface, you can read both ports simultaneously as a 16-bit word only if neither port is in the scan list. If one or both ports are included in the scan list, you can read only one 8-bit port at a time. However, if you have included both ports in the scan list, the data will be read from both ports simultaneously and will have the same time stamp. Therefore, you can externally combine the two 8-bit quantities into a 16-bit quantity.

•From the front-panel only, you can specify whether you want to use binary or decimal format (readings are always stored in memory in decimal format). Once you have selected the number base, it is used for all input or output operations on the same port.

•You can monitor a digital input channel even if the channel is not part of the scan list (the internal DMM is not required either).

•A Factory Reset (*RST command), Instrument Preset (SYSTem:PRESet command), and Card Reset (SYSTem:CPON command) from the remote interface will reconfigure both ports as input ports.

Note that a from the front panel resets only the port currently selected (both ports are not reset).

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34970A specifications

Agilent Technologies 34970A is a versatile data acquisition and measurement system that has gained popularity in various industries, including research and development, manufacturing, and education. The primary purpose of the 34970A is to offer an efficient solution for data collection, monitoring, and analysis, which can significantly enhance productivity and accuracy in testing applications.

One of the main features of the 34970A is its modular design, allowing users to customize the system according to their specific measurement needs. The mainframe can accommodate up to three plug-in measurement modules, which can include various types of measurements such as analog, digital, temperature, and frequency. This modularity provides flexibility for users to tailor the system to their requirements, making it highly adaptable to different applications.

Another notable characteristic of the Agilent 34970A is its impressive channel configuration. The system can support up to 120 measurement channels when fully configured, enabling extensive data acquisition without the need for multiple devices. This capability is essential for applications requiring simultaneous monitoring of multiple parameters or locations.

The 34970A utilizes advanced signal processing technologies to ensure high-accuracy measurements. The internal 6.5-digit resolution multimeter provides precise readings, while the device also supports various input types, such as thermocouples and RTDs for temperature measurements. The ability to perform mathematical functions, such as summation and averaging, on the acquired data further enhances its usability.

For data storage and management, the Agilent 34970A features built-in memory for storing up to 20,000 readings. Users can also easily transfer data to a PC through the RS-232 interface or GPIB (IEEE 488) for further analysis and reporting. Additionally, it offers the capability to program automatic data logging and scheduling of measurements, which streamlines the testing process and reduces manual intervention.

In terms of user interface, the 34970A is equipped with a large graphical display that provides clear visualization of measurement data and easy navigation through settings and options. The menu-driven interface makes it accessible for users of all skill levels, simplifying the setup and operation of the device.

Overall, the Agilent Technologies 34970A stands out for its modularity, high channel capacity, advanced measurement technologies, and user-friendly interface. As a reliable and efficient data acquisition system, it is well-suited for a wide range of applications, making it an essential tool for engineers and technicians looking to enhance measurement precision and efficiency.

Agilent Technologies 34970A manual Digital Input Operations

Models: 34970A