Rockwell Automation GMLC Reference Manual - Manual (Page 431)

Publication GMLC-5.2 - November 1999
394 DH-485 Blocks
With binary files, each element contains 16 bits—or sub-elements—but
the entire word containing the desired bit is transferred. A maximum of
1,920 bits may be represented in 240 data bytes.
See Allen-Bradley Data Highway/Data Highway Plus ™ /DH-485
Communication Protocol and Command Set Reference Manual
(publication 1770-6.5.16), for more information on the Protected Typed
Logical Write with Three Address Fields command.
On DH-485 Status
Use the On DH-485 Status block to:
•
Evaluate the status of DH-485 communications.
• Pause the program until the specified DH-485 status condition is true.
The On DH-485 Status block resides on the DH-485 Toolbar.
See Using the DH-485 Option chapter in this manual for information on
configuring DH-485 operation.
DH-485 Value Block
DH-485 Command Data Bytes
GML Commander
File Type Data Bytes
per Element Maximum Elements per
GML Block
Binary 2 (16 bits) 120
Integer 2 120
Floating 4 60
ASCII 1 240
BCD 2 120
IntFloat 4 60