Time stamp, Plc block transfer instruction data, Message operation – Rockwell Automation 1336T ControlNet Frn1.02 Rev 1.5 User Manual
Page 102: Example, Load clock info reference stamp
4–60
Using Unscheduled Messaging
Publication 1336 FORCE–5.18 ––March, 1999
The Load Clock Info Reference Stamp message loads the real-time
clock data into the reference stamp.
PLC Block Transfer Instruction Data
PLC Message Write instruction length:
3 words
PLC Message Read instruction length:
3 words
Header
Word 1
Header
Word 1
Header
Word 2
Header
Word 2
Header
Word 3
0
Message Structure
Header
Word 3
0
PLC Decimal Value
0
PLC Decimal Value
2818 –– Message OK
-29950 –– Message Error
Message Length
3
Message Length
0
PLC Request –– PLC Message Write
Drive Response –– PLC Message Read
Message Operation
The Load Clock Info Reference Stamp function specified in the
PMW sends the real-time clock data to the reference stamp. The
reference stamp time then follows the real-time clock data.
Example
In this example, the request to load the real-time clock data into the
reference stamp was sent through the PMW. The PMR responded
with a message of OK.
1
0
N7:10
2
3
4
5
6
7
8
9
N7:90
PLC MSG
Write File
PLC MSG
Read File
Data Format
0
0
3
0
0
2818
Time Stamp
Load Clock Info Reference
Stamp