Rockwell Automation 1336T ControlNet Frn1.02 Rev 1.5 - Manual (Page 91)

4–49 Using Unscheduled Messaging
Publication 1336 FORCE–5.18 ––March, 1999
The Real Time Clock Data Read message is provided to allow the
drive to read the specified real-time clock. The slave device can read
the time in seconds, minutes, and hours as well as the day, date,
month, and year.
PLC Block Transfer Instruction Data
PLC Message Write instruction length: 3 words
PLC Message Read instruction length: 7 words
Header
Word 1 Header
Word 1
Header
Word 2 Header
Word 2
Header
Word 3
0
Message Structure
Message Length
3
Header
Word 3
0
PLC Decimal Value
2816
Clock Time
Seconds
Clock Time
Hour Minute
PLC Decimal Value
2816 –– Message OK
-29952 –– Message Error
Clock Time
Date Day
Clock Time
Year Month
Data
Word 4
Data
Word 5
Data
Word 6
Data
Word 7
0
PLC Request –– PLC Message Write
10ths of S
Drive Response –– PLC Message Read
Message Operation
The Real Time Clock Data Read function reads the real-time clock
data from the drive. The Clock Time is returned in the order shown
in the header message. You should view this information as hex text.
The Time is based on a 24-hour clock.
Clock Data
Real Time Clock Data Read