Appendix2. The diffrence between DPCS and DPCS Emulator
54
Control period
In a DPCS emulator, each control card of DPCS is registered to either a main scan or a high-speed scan.
The program of each control card is executed according to the execution time of a main scan or a
high-speed scan. An execution order in the same scan is an order of a slot number. Below, registration of
a control card and the example of the order of execution are shown.
Table A2.12 An execution order and a slot number
Slot
Number
Control card Scan setting
Main/High-speed
Execution order of
High-speed scan
Execution order of
Main scan
15 VSCPX2 Main 1
16 VACPX2 Main 2
21 VLCPX5 Main 3
22 VLCPX5 Main 4
23 VLCPX5 High-speed 1
24 VLCPX5 High-speed 2
31 VDOPX1 －
32 VDOPX1 －
33 VDOPX1 －
34 VDINX1 －
35 VDINX1 －
36 VDINX1 －
39 VPCPX2 Main 5
Operation in a main scan and a high-speed scan is performed in order of a slot for every control card as
shown below.
Check
download
Input
from
I/O
Gather
V-Para
Execute program Make
RAW
data
Output
to I/O
Control card
Slot 11
. . . . . Control card
Slot NN
. . . . . Control card
Slot 6A
Tracking
Figure A2.1 High-speed scan
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