Omron CPM1 Programming Manual

51
CQM1 Interrupt Functions Section 1-5
Controlling High-speed Counter 0 Interrupts
1,2,3... 1. Use the CTBL(63) instruction to save the comparison table in the CQM1
and begin comparisons.
If C is set to 000, then comparisons will be made by the target matching
method; if 001, then they will be made by the range comparison method. The
comparison table will be saved, and, when the save operation is complete,
then comparisons will begin. While comparisons are being executed, high-
speed interrupts will be executed according to the comparison table. For
details on the contents of the comparison tables that are saved, refer to the
explanation of the CTBL(63) instruction in SECTION 5 Instruction Set.
Note The comparison results are normally stored in AR 1100 through AR 1107
while the range comparison is being executed.
If C is set to 002, then comparisons will be made by the target matching
method; if 003, then they will be made by the range comparison method. For
either of these settings, the comparison table will be saved, but comparisons
will not begin, and the INI(61) instruction must be used to begin comparisons.
2. To stop comparisons, execute the INI(61) instruction as shown below.
To start comparisons again, set the second operand to “000” (execute com-
parison), and execute the INI(61) instruction.
Once a table has been saved, it will be retained in the CQM1 during operation
(i.e., during program execution) as long as no other table is saved.
Reading the PV
There are two ways to read the PV. The first is to read it from SR 230 and SR
231, and the second to use the PRV(62) instruction.
Reading SR 230 and SR 231
The PV of high-speed counter 0 is stored in SR 230 and SR 231 as shown
below. The leftmost bit will be F for negative values.
Note These words are refreshed only once every cycle, so there may be a differ-
ence from the actual PV.
When high-speed counter 0 is not being used, the bits in these words can be
used as work bits.
(@)CTBL(63)
P
C
TB
C: (3 digits BCD)
000: Target table set and comparison begun
001: Range table set and comparison begun
002: Target table set only
003: Range table set only
TB: Beginning word of comparison table
(@)INI(61)
000
001
000
Leftmost 4 digits Rightmost 4 digits Up/Down Mode Incrementing Mode
SR 231 SR 230 F0032767 to 00032767
(–32767)
00000000 to 00065535

Omron CPM1 Specifications

General

Model	CPM1
Manufacturer	Omron
Instruction Set	Basic and advanced instructions
Power Supply	100 to 240 VAC or 24 VDC
Communication	RS-232C
I/O Points	10, 20, 30, or 40 points depending on the model
Timers	Yes, multiple timers available
Counters	Yes, multiple counters available
Input Voltage	24V DC
Output Type	Relay or transistor
Number of I/O Points	10, 20, 30, 40
Communication Ports	RS-232C (optional)
Operating Temperature	0°C to 55°C
Storage Temperature	-20°C
Humidity	10% to 90% (non-condensing)
Dimensions	Varies depending on the model
Weight	Varies depending on the model
Program Memory	2048 steps (2K steps)