Rockwell Automation 1336T Function Block Prog. Manual, Series A/B - Manual (Page 130)

5–14 Block Transfer Services
1336 FORCE — 5.9 August 1995
The Library Description message allows you to read the library’s
version number and the number of blocks in the library.
PLC Block Transfer Instruction Data
BTW Instruction Length: 3 Words
BTR Instruction Length: 5 Words
0
Header
Word 1 Header
Word 1
PLC Decimal Value
Library Version * 100
Message Structure
Header
Word 2
Data
Word 3
Header
Word 2
Header
Word 3
Data
Word 4
0
PLC Request –– Block Transfer Write
Drive Response –– Block Transfer Read
Number of Blocks Data
Word 5 in Library
3840
Dec
–16384
Dec
–16384
Dec
3840 –– Message OK
–28928 –– Message Error
Message Operation
When you request a Library Description message, the drive responds
by placing the library version number times 100 in Word 4 and the
number of blocks the library contains in Word 5.
Example
In this example, the Library Description requests returns 100
Dec
(version 1.00) for the library version number and 28
Dec
for the
number of blocks in the library.
1 0
N10:10
2 3 4 5 6 7 8 9
N10:90
BTW
Data File
BTR
Data File
Data Format
–16384
–16384 100
0
0
3840
3840 28
Program Limits
Information:
Library Description