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8 Pulse Outputs
CJ2M CPU Unit Pulse I/O Module User’s Manual
8-7 Reading the Pulse Output Frequency
8
8-7 Reading the Pulse Output Frequency
The frequency of a pulse output can be read in the following two ways.
• Reading the value at any time during program execution: Read by executing the PRV(881) instruc-
tion.
• Reading the value for each trace sampling cycle: Specify tracing the pulse frequency in the I/O Mod-
ule AR Select Area on the Data Trace Configuration Tab Page of the CX-Programmer
z HIGH-SPEED COUNTER PV READ (PRV(881)) Instruction
z Specifying Pulse Frequency for Tracing with the Data Trace Function in the
Easy Setup of the CX-Programmer
Select the pulse frequencies to be traced (pulse output n, where n = 0 to 3, in 1-Hz increments) in
the I/O Module AR Select Area on the Data Trace Configuration Tab Page of the CX-Programmer.
The frequency of the specified pulse output will be traced every trace sampling cycle.
Reading the Value When a Ladder Program Is Executed
Reading the Pulse Output Frequency in Each Trace Sampling Cycle
P: Port specifier, Example: Pulse output 0
C: Control data (Read pulse output 0 frequency using the normal method)
@PRV
#0000
#0003
D101
PV (lower word)
Pulse output 0 frequency that was read
D100
PV (upper word)
D100
D: First destination word
Execution condition
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