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7-167
PR
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7.9 Display instructions
7.9.1 Print ASCII code instruction (PR)
(b) If SM701 is OFF, everything from the device designated by to the 00H code will be
the target of the operation.
(2) The number of points used by the output module is 10 points from the Y address designated
by .
(3) Output signals from the output module are transmitted at the rate of 30 ms per character.
For this reason, the time required to the completion of the transmission of the designated
number of characters (n) will be 30 ms n (ms).
At 10 ms interrupt intervals, the PR instruction executes data output, strobe signal ON, and
strobe signal OFF. The other instructions are executed continuously during a period
between the above processings.
(4) In addition to the ASCII code, the output module also outputs a strobe signal (10 ms ON, 20
ms OFF) from the + 8 device.
(5) Following the execution of the PR instruction, the PR instruction execution flag ( + 9
device) remains ON until the completion of the transmission of the designated number of
characters.
(6) The PR and PRC instructions can be used multiple times, but it is preferable to establish an
interlock with the PR instruction execution flag ( + 9 device) so that they will not be ON
simultaneously.
(7) If the contents of the device in which ASCII codes are stored changes during the ASCII code
output, the modified data after change will be output.
S
+1
41
H
(A)
42
H
(B)
43
H
(C)
44
H
(D)
+2
45
H
(E)
46
H
(F)
47
H
(G)
48
H
(H)
+3
4B
H
(K)
4C
H
(L)
00
H
(NULL)
4E
H
(N)
4F
H
(O)
50
H
(P)
49
H
(I)
4A
H
(J)
+4
+5
+6
+7
b15 b8
b7
b0
Head of output
Scheduled
completion
ASCII code output
Strobe signal output
Flag indicating PR
instruction in execution
Upper 8 bits Lower 8 bits
+8
+9
+7
Sequence program
+0
Output Y
42
H
44
H
46
H
48
H
4C
H
4A
H
41
H
43
H
45
H
47
H
4B
H
49
H
S
D
S
S
S
S
S
S
S
D
D
D
Used as interlock
Device where ASCII code is stored
Printer or
display device
D
Strobe signal
OFF
ON
30 ms
10 ms 10 ms 10 ms
10 ms 10 ms
Data output
Execution of sequence program
PR instruction processing
D
D
D