This chapter provides information about the supported functions for Modicon devices, and how to access these functions.

3.1 Accessing DAS Functions

DAS for Modicon programmable controllers functions are accessed through the BASEstar Classic software, through the following means:

• Commands
• Menu system
• Callable services

To use the BASEstar Classic device connection management commands, enter the following command at the DCL prompt ($):

$ BSTAR DCM

To use the BASEstar Classic device connection management menu system, enter the following command:

$ BSTAR/MENU

For information about the BASEstar Classic device connection management commands and the menu system, refer to the BASEstar Classic Menu Interface User's Guide.

For information about the BASEstar Classic device connection management callable services, refer to the BASEstar Classic Introduction to Callable Services.

3.2 Structured Data

Structured data is a block of data, typically represented by a buffer, that can be broken down into meaningful elements of data. Structured data allows you to impose a structure on the data formats for any given read or write operation. A structure tells the device how to interpret the data that it is reading or writing.

Structured data can represent synchronized data elements from a single source, such as a plant-floor device. Structured data can also represent composite views of different data elements from different sources, such as the total part counts from several different plant-floor devices.

For the DAS for Modicon programmable controllers, mixed data types are not allowed within a given address range.

3.3 Supported Functions

This section describes the functions that are supported by the DAS for Modicon programmable controllers devices.

Table 3-1 displays the Modicon devices and the functions they support.

Table 3-1 Modicon Devices and Functions

Device	Upload	Download	Start	Stop	Read Data	Write Data	Read Status
Quantum 1	X	X	X	X	X	X	X
984A	X	X	X	X	X	X	X
984B	X	X	X	X	X	X	X
984X	X	X	X	X	X	X	X
584L	X	X	X	X	X	X	X
584M	X	X	X	X	X	X	X