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REGISTER COMPARISON TABLE: CTBL(882) Section 5-4
Examples
■ 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 a rotational speed (r/min), and outputs the hexadecimal result to
D00201 and D00200.
■ 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.
5-4 REGISTER COMPARISON TABLE: CTBL(882)
Purpose 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 the CJ1M-CPU21/CPU22/CPU23 CPU Units
only.
Ladder Symbol
Variations
Applicable Program Areas
PRV2
#0000
#0003
D00200
000100
Convert frequency to speed (r/min).
Pulses/revolution
PRV2
#0001
#0003
D00300
000100
Convert counter PV to revolutions.
Pulses/revolution
CTBL(882)
P
C
TB
P: Port specifier
C: Control data
TB: First comparison table word
Variations Executed Each Cycle for ON Condition CTBL(882)
Executed Once for Upward Differentiation @CTBL(882)
Executed Once for Downward Differentiation Not supported
Immediate Refreshing Specification Not supported
Block program areas Step program areas Subroutines Interrupt tasks
OK OK OK OK
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