Register Comparison Table: Ctbl(882) (Cj1M-Cpu21/22/23 Only) - Omron SYSMAC CJ - REFERENCE MANUAL 01-2008 Reference Manual

High-speed Counter/Pulse Output Instructions
3-21-4 REGISTER COMPARISON TABLE: CTBL(882) (CJ1M-CPU21/22/23
Only)
Purpose
Ladder Symbol
Variations
Applicable Program Areas
Operands
000100
■ Example 2
When CIO 000100 is ON in the following programming example, PRV2(883)
reads the counter PV, converts that value to number of revolutions, and out-
puts the hexadecimal result to D00301 and D00300.
000100
CTBL(882) is used to register a comparison table and perform comparisons
for a high-speed counter PV. Either target value or range comparisons are
possible. An interrupt task is executed when a specified condition is met.
This instruction is supported by CJ1M-CPU21/22/23 CPU Units only.
CTBL(882)
P
P: Port specifier
C
C: Control data
TB TB: First comparison table word
Variations Executed Each Cycle for ON Condition
Executed Once for Upward Differentiation
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification
Block program areas
OK
P: Port Specifier
P specifies the port for which pulses are to be counted as shown in the follow-
ing table.
P
0000 hex High-speed counter 0
0001 hex High-speed counter 1
PRV2
Converting frequency to rotation speed
#0000
Pulses per revolution
#0003
D00200
PRV2
#0001 Converting counter PV to total number of revolutions
#0003 Pulses per revolution
D00300
Step program areas Subroutines
OK OK
Port
Section 3-21
CTBL(882)
@CTBL(882)
Not supported
Interrupt tasks
OK
879