Omron NT620S Operation Manual page 203

Outline of Host Link/NT Link Operation
Procedure 1. Use the support tool to allocate the PT status control area (PC to PT) to the
192
S Available allocation words
The PT status control area (PC to PT) can be allocated to the following PC
areas.
Symbol C Series PCs
DM Data Memory
CH Internal/Special Relay
TIM Timer
CNT Counter
HR Holding Relay
AR Auxiliary Relay
LR Link Relay
Since the special auxiliary relays of the CVM1/CV series PCs are allocated to
the system, they cannot be used for purposes other than the system use.
The range of respective area varies with the type of PC. Refer to Appendix L
"PC Memory Map" (page 327).
PC memory.
2. Create a PC program to write the number of the displayed screen to the
"screen switch setting word" in the PT status control area.
Use a 4-digit BCD (binary-coded decimal) value to set a screen number.
If a screen has been switched by operating the PT status control area (PC to
PT), the contents of the "currently displayed screen word" in the PT status
notify area (PT to PC) also change.
S Startup screen
When the NT620S/620C starts up, it displays the screen whose screen num-
ber is written in the "screen switch setting". The startup screen set with the sup-
port tool is invalid.
S Screen switching timing
The NT620S/620C screen switches when the contents of the "screen switch
setting" have changed. To re-specify the number of the currently specified
screen, first write the value 0000 to clear the screen before writing the appropri-
ate screen number.
S Use of the screen switching strobe
Create a program to read the number of the currently displayed screen and to
write the number to the "screen switch setting word" at the leading edge of the
"screen switching strobe" of the PT status notify area. This program enables
screen switching by using the touch switches on the NT620S/620C and elimi-
nates repeated setting of the same screen number. If the screen switching is
not executed on the NT620S/620C, the screen switching strobe does not need
to be checked.
For the screen switching strobe, refer to the "notifying the displayed screen to
the PC" (page 195).
S Continuous screens and overlapping screens
Continuous or overlapping screens can be displayed by designating the parent
screen. If a child screen is designated, only the child screen is displayed.
Allocated CVM1/CV Series PCs
f
Data Memory
f
Internal/Special Relay
Timer
Counter
f
–
f
Auxiliary Relay
f
–
Section 5-1
Allocated
f
f
f: OK
: NG