Specifications

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Allen-Bradley DH+/DH-485 Device Driver Help
RLEN
Short, Word
Read/Write
DLEN
Short, Word
Read/Write
EN
Boolean
Read/Write
ST
Boolean
Read/Write
DN
Boolean
Read/Write
ER
Boolean
Read/Write
CO
Boolean
Read/Write
EW
Boolean
Read/Write
NR
Boolean
Read/Write
TO
Boolean
Read/Write
Example
Description
MG14:0.RLEN
requested length field of MG 0 file 14
MG18:6.CO
continue bit of MG 6 file 18
Block Transfer Files
Block transfer 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
BT<file>:<element>.<field>
Depends on field
The following file numbers and maximum element are allowed for each model.
PLC Model
File Number
Max Word
SLC 5/05 Open
NA
NA
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.
Element Field
Data Type
Access
RLEN
Word, Short
Read/Write
DLEN
Word, Short
Read/Write
FILE
Word, Short
Read/Write
ELEM
Word, Short
Read/Write
RW
Boolean
Read/Write
ST
Boolean
Read/Write
DN
Boolean
Read/Write
ER
Boolean
Read/Write
CO
Boolean
Read/Write
EW
Boolean
Read/Write
NR
Boolean
Read/Write
TO
Boolean
Read/Write
Example
Description
BT14:0.RLEN
requested length field of BT 0 file 14
BT18:6.CO
continue bit of BT 6 file 18
Data Types Description