2-12
Section
Inputting Numeric Values
199
Desired input
range
Lower limit to set
Upper limit to set
0 to FFFF
H
–32,768 ($8000)
32,767 ($7FFF)
0 to FFFFFFFF
H
–2,147,483,648 ($8000 0000)
2,147,483,647 ($7FFF FFFF)
Interlock Function
A numeral input from a thumbwheel switch can be controlled (enabled/disabled)
from the PC by setting the interlock function for the numeral input and allocating
an interlock bit in a PC data area. The status of the allocated interlock bit is read
and its status determines whether the thumbwheel switch is enabled or dis-
abled.
The following table shows how the PT operates when the interlock function is
used or not used.
Interlock
function
Operation
Used
Numerical values can be changed by pressing the increment and
decrement touch switches only while the interlock bit is ON.
If you attempt to change a value while the interlock bit is OFF, the
buzzer will sound and the value will not change.
Not used
Values can be changed with the increment and decrement touch
switches at any time.
The PT continuously reads the status of the corresponding interlock bit while a
thumbwheel switch’s numeral input field that uses the interlock function is being
displayed on the screen. if the interlock bit’s status changes, the thumbwheel
switch is disabled or enabled according to the interlock bit’s status.
Reference:
If the touch switch input sound has been turned OFF with the PT’s memory
switch setting, the buzzer won’t sound even though you attempt to change an
interlocked thumbwheel switch’s value.
Interlock Bit Allocation
Interlock bits can be allocated to the following host (PC) areas.
Symbol
C-series PCs
Allocation
CV-series PCs
Allocation
CS1-series PCs
Allocation
None
IR Area
f
CIO Area
f
CIO Area
f
H
HR Area
f
---
---
HR Area
n
A
AR Area
f
Auxiliary Area
AR Area
f
L
LR Area
f
---
---
LR Area
*1
n
T
TC Area,
Timer PVs
Timer Area,
Timer PVs
TC Area,
Timer PVs
TU
---
---
---
---
TC Area,
Timer Completion Flags
n
C
TC Area,
Counter PVs
Counter Area,
Counter PVs
TC Area,
Counter PVs
CU
---
---
---
---
TC Area,
Counter Completion Flags
n
W
---
---
---
---
WR Area
n
TK
---
---
---
---
Task Flags
n
D
DM Area
f
DM Area
f
DM Area
f
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Summary of Contents for NT21 Series
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