BASEstartm Open DAS
for Allen-Bradley Data Highwaytm
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Installation and User's Guide


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3.3.5 SLC Addressing Syntax and Supported Data Types

This section describes legal data table addresses and data types for the 1747 SLC 500 family.

The structure of a legal data table address for the SLC differs depending on the table that is being addressed. The SLC supports the following data table sections:

I - Input
O - Output
S - Status
B - Binary
T - Timer
C - Counter
R - Control
N - Integer
F - Floating-Point
A - ASCII
ST - String

Note

ASCII, ASCII string and floating-point are available only on SLC 5/03 Series C with OS301 and SLC 5/04 Series A with OS400.

Figure 3-40 shows the structure of a legal I/O data table address for the SLC.

Table 3-26 shows examples of legal I/O data table addresses for the SLC.

Figure 3-40 SLC I/O Data Table Address Format


Note

Reading and writing of I/O data table addresses is supported only for SLC-5/03 and SLC-5/04 processors.

Table 3-26 Example SLC I/O Data Table Addresses
Example Address MMS Type1 Description
I:4 UNSIGNED_16 Input image I/O slot 4
I:5.1 INTEGER_16 Input image I/O slot 5 word 1
I:10.1/15 BIT_STRING Bit 31 of I/O slot 10
$O:8/1 BIT_STRING Bit 1 of I/O slot 8
I:0 Array of 10 UNSIGNED_16 Ten words beginning at I/O slot 0


1Arrays are supported. Structures are not supported. Variable size arrays are not supported.


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