Omron SYSMAC C200H-NC111, Руководство по эксплуатации

Страница: 86 / 162

75
Execution Example
(Normal Transfer)
This example assumes that bit 15 of word n+2 is 0.
Set necessary information in IR area.
1
0
1
0
1
0
Data transfer Data processing
Preparation of data
in PC’s data areas
Beginning transfer number
word n+2, bits 15-08
Beginning word number
word n+3
PC data area/no. of transfers
word n+4
TRANSFER DATA
word n, bit 10
Transfer completed flag
word n+5, bit 10
Busy flag
word n+5, bit 12
4–8–3 Present Position Preset
If bit 15 of word n+2 is 1, the TRANSFER DATA command bit, bit 10 of word
n, is set to either preset or change the present position. This command can
be used to eliminate the need to execute ORIGIN SEARCH to establish posi-
tion. Since the origin, present position, and so on, are not known when the
Unit is powered up, it is ordinarily necessary to execute ORIGIN SEARCH
first. However, when you want to know the absolute position and set a par-
ticular numerical value, you can use the preset function.
Retaining Present
Position
No data is retained in the Position Control Unit once power is turned OFF.
When the present position needs to be retained, copy it (words n+8 and n+9)
Transfer Data
Section 4–8