BASEstar^tm Classic DAS
for Allen-Bradley
Data Highway^tm Protocol
Installation and User's Guide

Address syntax and supported device connection management data types for read and write operations vary between the SLC-5/04 and SLC-5/03 and other models of the SLC family of devices.

The following sections describe the use of the read data and write data functions by specific devices, including addressing and data type formats. Addressing and data type formats are necessary for performing the read data and write data functions for the SLC family of devices.

Data Type Formats

Table 3-26 shows which data type formats are supported for reading from and writing to the various file types of the SLC family.

Table 3-26 SLC Data Format General Reference

Device File Type	Bit	Word	Long	Float	String
Status	X	X
Binary	X	X
Timer	X	X
Counter	X	X
Control	X	X
Integer	X	X	X		X
Floating Point				X
ASCII					X
String					X

General Address Formats

The general format for specifying addresses for the SLC family devices is:

FSf:nn/bb or FSf:nn.mne

where:

• FS = file specifier (specifies the device file type)
• f = decimal file number
• nn = decimal element number
• bb = bit address (decimal)
• mne = sub-element or bit mnemonic

Specific Address Formats

The following tables describe address specifications and data types for specific SLC family file types. Refer to the general address formats listed above for a description of the conventions used to describe address specifications.

Status File Addresses

Table 3-27 describes address specifications and data types for status file addresses.

Table 3-27 Status File Addresses

Address	Format	Comment
mS:nn	Word	Status file word
mS:nn/bb	Bit	Status file bit

Binary File Addresses

Table 3-28 describes address specifications and data types for binary file addresses.

Table 3-28 Binary File Addresses

Address	Format	Comment
mBf:nn	Word	Binary file word
mBf:nn/bb	Bit	Binary file bit

Timer File Addresses

Table 3-29 describes address specifications and data types for timer file addresses. Timers can be read as entire structures or addressed at the sub-element level.

Table 3-29 Timer File Addresses

Address	Format	Comment
Tf:nn	Struct(Array[3]:word)	Timer structure
Tf:PRE	Word	Timer preset
mTf:PRE/bb	Bit	Timer preset bit
Tf:ACC	Word	Timer accumulator
mTf:ACC/bb	Bit	Timer accumulator bit
mTf:EN 1	Bit	Timer enable bit
mTf:TT 1	Bit	Timer timing bit
mTf:DN 1	Bit	Timer done bit

Counter File Addresses

Table 3-30 describes address specifications and data types for counter file addresses. Counters can be read as entire structures or addressed at the sub-element level.

Table 3-30 Counter File Addresses

Address	Format	Comment
mCf:nn	Struct(Array[3]:word)	Entire counter structure
mCf:PRE	Word	Counter preset
mCf:PRE/bb	Bit	Counter preset bit
mCf:ACC	Word	Counter accumulator
mCf:ACC/bb	Bit	Counter accumulator bit
mCf:CU 1	Bit	Counter up enable bit
mCf:CD 1	Bit	Counter down enable bit
mCf:DN 1	Bit	Counter done bit
mCf:OV 1	Bit	Counter overflow bit
mCf:UN 1	Bit	Counter underflow bit
mCf:UA 1	Bit	Counter update accumulator bit

Control File Addresses

Table 3-31 describes address specifications and data types for control file addresses.

Table 3-31 Control File Addresses

Address	Format	Comment
mRf:nn	Struct(Array[3]:word)	Entire control structure
mRf:nn.LEN	Word	Control expression files length
mRf:nn.LEN/bb	Bit	Length bit
mRf:nn.POS	Word	Control expression file position
mRf:nn.POS/bb	Bit	Position bit
mRf:nn.EN 1	Bit	Enabled bit
mRf:nn.EU 1	Bit	Enabled unloading bit
mRf:nn.DN 1	Bit	Done bit
mRf:nn.EM 1	Bit	Empty bit
mRf:nn.ER 1	Bit	Error bit
mRf:nn.UL 1	Bit	Unload bit
mRf:nn.IN 1	Bit	Inhibit comparisons bit
mRf:nn.FD 1	Bit	Found bit