Rockwell Automation 1395 Node Adapter Board - Manual (Page 38)

Chapter 3
Functional Description
3-26
Read System Clock This function reads the system time from the Drive.
PLC Block Transfer Data –
BTW Instruction Length: 4
BTR Instruction Length: 40
BTW Message Structure –
Message Header Information:
Word 1: 0
Word 2: 0
Function Code, Word 3: 1026
Write Message Length, Word 4: 8 bytes
WORD
0
0
1026
8
BTW (SETUP) BTR (RETURNED DATA)
0
0
1026
See Note
1
2
3
4
NOTE: Word 4 of the BTR instruction is broken down into
two bytes. The High byte contains the status bits
per table 3.B. The low byte contains the Drive
message length in bytes.
5
6
Year
Month ( 1 – 12 )
Day ( 1–31 )
Hour ( 0 – 24 )
Second ( 0 – 59 )
Minute ( 0 – 59 )
10’s of msec (0–100)
7
8
9
10
11
Message Operation – The READ SYSTEM CLOCK function requests the
Drive to provide it’s current time. The Drive stores time in the 24 hour
format. The values returned are integer type and may be scaled by the PLC
Controller prior to being used in the Program.