Specifications

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Allen-Bradley DH+/DH-485 Device Driver Help
Note: Word and bit address information is in octal for PLC-5 models. This follows the convention of the programming
software.
The syntax for SLC Family Open models (modular I/O):
Syntax
Data Type
O:<slot>
Short, Word, BCD
O:<slot>.<word>
Short, Word, BCD
O:<slot>/<bit>
Boolean
O:<slot>.<word>/<bit>
Boolean
The following slot and word locations are allowed for each model.
PLC Model
Min Slot
Max Slot
Max Word
SLC Family
1
30
*
PLC-5 Family
NA
NA
277 (octal)
*The number of Input or Output words available for each I/O module can be found in the Modular I/O Selection
Guide.
For slot configuration help see the Device Setup page of this help file.
Examples
PLC-5
Addresses are in octal
O:0
word 0
O:37
word 31 (37 octal=31 decimal)
O/42
bit 34 (42 octal=34 decimal)
O:2/2
bit 2 word 2 (same as O/42)
SLC Family
O:1
word 0 slot 1
O:1.0
word 0 slot 1 (same as O:1)
O:12
word 0 slot 12
O:12.2
word 2 slot 12
O:4.0/0
bit 0 word 0 slot 4
O:4/0
bit 0 slot 4 (same as O:4.0/0)
O:4.2/0
bit 0 word 2 slot 4
O:4/32
bit 32 slot 4 (same as O:4.2/0)
Input Files
The syntax for accessing data in the input file differs depending on the PLC model. Arrays are not supported for input
files. Data locations are Read/Write for PLC-5 models, Read Only for all other models. The default data type for all
syntax is shown in bold.
The syntax for PLC-5 models:
Syntax
Data Type
I:<word>
Short, Word, BCD
I:<word>/<bit>
Boolean
I/bit
Boolean
Note: Word and bit address information is in octal for PLC-5 models. This follows the convention of the programming
software.