Register Comparison Table: Ctbl(882) (Cj1M-Cpu21/22/23 Only) - Omron SYSMAC CJ - REFERENCE MANUAL 08-2008 Reference Manual

High-speed Counter/Pulse Output Instructions
Examples
3-21-4 REGISTER COMPARISON TABLE: CTBL(882) (CJ1M-CPU21/22/23
Only)
Purpose
Ladder Symbol
Variations
Applicable Program Areas
878
■ Example 1
When CIO 000100 is ON in the following programming example, PRV2(883)
reads the present pulse frequency at high-speed counter 0, converts that
value to rotation speed (r/min), and outputs the hexadecimal result to D00201
and D00200.
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
PRV2
#0000 Converting frequency to rotation speed
#0003 Pulses per revolution
D00200
PRV2
#0001 Converting counter PV to total number of revolutions
#0003 Pulses per revolution
D00300
Step program areas Subroutines
OK OK
Section 3-21
CTBL(882)
@CTBL(882)
Not supported
Interrupt tasks
OK