Omron CPM1 - PROGRAMING MANUAL 02-2001 Programming Manual page 113

CPM1/CPM1A Interrupt Functions
Changing the PV
Application Example
(Incrementing Mode)
92
The PV is read when the PRV(62) instruction is actually executed.
There are two ways to change the PV of high-speed counter. The first way is to
reset it by using the reset methods. (In this case the PV is reset to 0.) The second
way is to use the INI(61) instruction.
The method using the INI(61) instruction is explained here. For an explanation of
the reset method, refer to the beginning of this description of high-speed count-
er.
Change the timer PV by using the INI(61) instruction as shown below.
(@)INI(61)
Leftmost 4 digits Rightmost 4 digits
D+1 D
To specify a negative number in up/down mode, set F in the leftmost digit.
This example shows a program that uses the high-speed counter with single-
phase inputs in the Incrementing Mode, making comparisons by means of the
target matching method.
The comparison conditions (target values and count directions) are stored in the
comparison table with the subroutine numbers. Up to 16 target values can be
stored. The corresponding subroutine is executed when the counter's PV
matches the target value.
The following data is stored for the comparison table:
DM 0000 0002
DM 0001 1000
DM 0002 0000
DM 0003 0030
DM 0004 2000
DM 0005 0000
DM 0006 0031
The following diagram shows the example ladder program. DM 6642 must be
set to 01j4, where j is the reset method which can be set to 0 or 1.
25315 (ON for first cycle)
CTBL(63)
SBN(92)
RET(93)
SBN(92)
RET(93)
D: Leading word for storing PV change data
000
002
D
Up/Down Mode
F0032767 to 00032767
Number of comparison conditions: 2
Target value 1: 1000
Comparison 1 interrupt subroutine no.: 30
Target value 2: 2000
Comparison 2 interrupt subroutine no.: 31
000
000 Registers comparison table, target value mode
DM 0000
First word of the comparison table
030
Interrupt program 30
031
Interrupt program 31
Section 2-3
Incrementing Mode
00000000 to 00065535