Omron SYSMAC C Series Operation Manual page 173

Data Exchange with CPU Unit
Pointer
Read/Write
Request Bit
PC Write
Completed Bit
Analog Output
Unit Read
Completed Flag
Read data
Analog Output
Unit Write
Completed Flag
PC Read
Completed Bit
162
10. The CPU Unit verifies that bit 07 of word n+3 is OFF, then turns OFF bit 07 of
word n+1 (PC Read Completed Bit).
CPU Unit
Allocated
I/O words
Timing Chart
08 to 15
Reads
address
00 to 15
1. Sets RAM address b.
2. Specifies read or write.
3. Turns ON the PC Write
Completed Bit.
4. The Analog Output Unit Read
Completed Flag is turned ON.
5. Turns OFF the PC Write
Completed Bit.
6. The Analog Output Unit Read
Completed Flag turns OFF
again.
7. Data is set in word n+2, and the
Analog Output Unit Write
Completed Flag is turned ON.
8. Reads data from word n+2 and
turns ON the PC Read
Completed Bit.
9. The Analog Output Unit Write Completed
Flag is turned OFF.
10. Turns OFF the PC Read Completed Bit.
Reads
data
Section 9-3
Analog Output Unit
Allocated I/O words
7. Reads data.
Address