Omron CP1L - 12-2007, Operation Manual

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Interrupt Functions
Section 6-1
Example 2: High-speed
Counter (Ring Mode) In this example, high-speed counter 1 operates in circular (ring) mode and
starts interrupt task 12 when the PV is between 25,000 (0000 61A8 hex) and
25,500 (0000 639C hex).
The maximum ring count is set at 50,000 (0000 C350 hex).
1,2,3... 1. Set high-speed counter 1 in the PLC Setup’s Built-in Input Tab.
2. Set the range comparison table starting at word D20000. Even though
range 1 is the only range being used, all 40 words must still be dedicated
to the range comparison table.
3. Create the program for interrupt task 12. Always put an END(001) instruc-
tion at the program’s last address.
W0.00
CIO 0.01
0
Counting enabled
Cyclic task
processing
Interrupt task
10 processing
Processing
interrupted Cyclic task
processing
Interrupt task
10 processing
Processing
interrupted
Cyclic task
processing
30,000 (7530 hex)
High-speed counter 0 PV
(in A270 and A271)
Item Setting
High-speed counter 1 Use counter
Counting mode Circular mode
Circular Max. Count 50,000
Reset method Software reset (continue comparing)
Input Setting Up/Down inputs
Word Setting Function
D20000 #61A8 Rightmost 4 digits of range 1 lower limit Lower limit value:
25,000
D20001 #0000 Leftmost 4 digits of range 1 lower limit
D20002 #639C Rightmost 4 digits of range 1 upper limit Upper limit value:
25,500
D20003 #0000 Leftmost 4 digits of range 1 upper limit
D20004 #000C Range 1 interrupt task number = 12 (C hex)
D20005 to
D20008 All
#0000 Range 2 lower and upper limit values
(Not used and don’t need to be set.) Range 2 settings
D20009 #FFFF Disables range 2.
~
D20014
D20019
D20024
D20029
D20034
#FFFF Set the fifth word for ranges 3 to 7 (listed at left) to #FFFF to
disable those ranges.
~
D20035 to
D20038 All
#0000 Range 8 lower and upper limit values
(Not used and don’t need to be set.) Range 8 settings
D20039 #FFFF Disables range 8.