Specifications

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Allen-Bradley DH+/DH-485 Device Driver Help
The following fields are allowed for each element. Refer to the PLC documentation for the meaning of each field.
Element Field
Data Type
Access
ACC
Short, Word
Read/Write
PRE
Short, Word
Read/Write
DN
Boolean
Read Only
TT
Boolean
Read Only
EN
Boolean
Read Only
Example
Description
T4:0.ACC
Accumulator of timer 0 file 4
T4:10.DN
Done bit of timer 10 file 4
T15:0.PRE
Preset of timer 0 file15
Counter Files
Counter files are a structured type whose data is accessed by specifying a file number, an element and a field. The
default data type depends on the field being accessed. Integer fields receive a default data type of Word.
Syntax
Data Type
C<file>:<element>.<field>
Depends on field
The following file numbers and maximum element are allowed for each model.
PLC Model
File Number
Max Element
SLC Family
5, 9-999
999
PLC-5 Family
3-999
1999
The following fields are allowed for each element. Refer to the PLC documentation for the meaning of each field. The
default is shown in bold.
Element Field
Data Type
Access
ACC
Word, Short
Read/Write
PRE
Word, Short
Read/Write
UA
Boolean
Read Only
UN
Boolean
Read Only
OV
Boolean
Read Only
DN
Boolean
Read Only
CD
Boolean
Read Only
CU
Boolean
Read Only
Example
Description
C5:0.ACC
accumulator of counter 0 file 5
C5:10.DN
done bit of counter 10 file 5
C15:0.PRE
preset of counter 0 file 15
Control Files
Control files are a structured type whose data is accessed by specifying a file number, an element and a field. The
default data type depends on the field being accessed. Integer fields receive a default data type of Word.
Syntax
Data Type