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4-4
Section
4. Press the Up and Down Arrow Keys to increment and decrement the con-
stant on the right. (In this case the SV is incremented once.)
↑
' '
5. Press the CLR Key twice to change the timer’s SV to the new value.
CLR
CLR
'
4-4-20 Hexadecimal, BCD Data Modification
This operation is used to change the BCD or hexadecimal value of a word
being monitored using the procedure described in
4-4-12 Bit, Digit, Word
Monitor
. It is possible in MONITOR or PROGRAM mode only.
RUN
MONITOR
PROGRAM
No
OK
OK
Words SR 253 to SR 255 cannot be changed.
Caution
Before changing the contents of I/O memory, be sure that the changes will not
cause equipment to operate unexpectedly or dangerously. In particular, take
care when changing the status of output bits. The PC continues to refresh I/O
bits even if the PC is in PROGRAM mode, so devices connected to output points
on the CPU Unit or Expansion I/O Units may operate unexpectedly.
1, 2, 3...
1. Monitor the status of the desired word according to the procedure described
in
4-4-12 Bit, Digit, Word Monitor
. If two or more words are being monitored,
the desired word should be leftmost on the display.
(Word monitor)
.
2. Press the CHG Key to begin hexadecimal, BCD data modification.
CHG
(
.
3. Input the new PV and press the WRITE Key to change the PV.
The operation will end and the normal monitoring display will return when
the WRITE Key is pressed.
C
2
A
0
A
0
WRITE
4-4-21 Binary Data Modification
This operation is used to change the status of a word’s bits when the word is
monitored using the procedure described in
4-4-14 Binary Monitor
. It is pos-
sible in MONITOR or PROGRAM mode only.
RUN
MONITOR
PROGRAM
No
OK
OK
Bits SR 25300 to SR 25507 and timer/counter flags cannot be changed.
Caution
Before changing the contents of I/O memory, be sure that the changes will not
cause equipment to operate unexpectedly or dangerously. In particular, take
care when changing the status of output bits. The PC continues to refresh I/O
bits even if the PC is in PROGRAM mode, so devices connected to output points
on the CPU Unit or Expansion I/O Units may operate unexpectedly.
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