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5-1
Section
Outline of Host Link/NT Link Operation
197
For this function, refer to the “Stand Alone Function” (page 154) or “Switching the
Screen Display (by Using the Allocated Bit of a Bit Memory Table)” (page 193).
S
Continuous screens and overlapping screens
When a continuous or overlapping screen is displayed, the number of the par-
ent screen is written to the “currently displayed screen word”.
For the continuous and overlapping screens, refer to the “Classification of
screens” (page 129).
Example of Reading the Number of Currently Display Screen
This example gives a PC program that reads the screen number each time the
screen is switched. In this example, the number of the previous screen is also
stored.
S
Support tool settings
Make the following settings with the support tool:
PT status notify area: CH 0110
S
PC ladder program
@MOV(21)
DM0100
DM0101
11212
@MOV(21)
110
DM0100
(1)
Word for storing the number of the previous screen
(2)
Word for notifying the number of the currently
displayed screen
Word for storing a new screen number
Screen switch
strobe flag
S
Program operation
(1) When the NT620S/620C screen display switches and the screen switch
strobe flag (bit 11212) turns ON, the contents of DM0100 are transferred to
DM0101. The number of the previously displayed screen is stored in word
0101.
(2) The new screen number notified by the NT620S/620C is read and trans-
ferred to DM0100. The number of the currently displayed screen is stored in
DM0100.
Summary of Contents for NT620C
Page 1: ...Cat No V033 E1 5 Programmable Terminals NT620S 620C OPERATION MANUAL...
Page 2: ...NT620S 620C Programmable Terminals Operation Manual Revised April 2001...
Page 3: ...iv...
Page 5: ...vi...
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