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Timer and Counter Instructions
Section 3-6
Clock Pulse and CNT Instruction
In this example, a CNT instruction counts the pulses from the 1-s clock pulse
to make a 700-second timer.
If the First Cycle Flag (A20011) is ORed with the counter’s reset input
(CIO 000001), the counter’s PV will be reset to the SV (0700) when program
execution begins rather than resuming the count from the previous PV.
Example 2:
Two-stage Counter
When an SV higher than 9999 is required, two counters can be combined as
shown in the following example. In this case, two CNT instructions are com-
bined to make a BCD counter with an SV of 20,000.
000000 LD
010000
000001 LD
000001
000002 CNT
0002
#0100
000003 LD
000000
000004 AND
NOT 010000
000005 AND
NOT C0002
000006 TIM
0001
#0050
000007 LD
T0001
000008 OUT
010000
000009 LD
C0002
000010 OUT
000201
Address Instruction Operands
Start
Count up
000000 1 s (1-s clock)
000001
A20011
C0001
Address Instruction Operands
000000 LD
000000
000001 AND
1
s
000002 LD
000001
000004 CNT
0001
#0700
000005 LD
C0001
000006 OUT
000202
000003 OR
A20011
Address Instruction
000000 LD
000000
000001 AND
000001
000002 LD
NOT 000002
000003 OR
C0001
000004 OR
C0002
000005 CNT
0001
#0100
000006 LD
C0001
000007 LD
NO
000002
000008 CNT
0002
#0200
000009 LD
C0002
000010 OUT
000203
Operands
Summary of Contents for CJ1G-CPUxx
Page 3: ...iv N o t i c e ...
Page 5: ...vi ...
Page 21: ...xxii Conformance to EC Directives 6 ...
Page 35: ......
Page 1131: ...1110 CJ series Instruction Execution Times and Number of Steps Section 4 2 ...