2-7
Section
Synchronized Pulse Control (CPM2A/CPM2C Only)
135
The directions of pulse inputs are all ignored. The frequency of a pulse that has
been input is read, without regard to the direction.
The following table shows the relationships between synchronized pulse control
and the CPM2A’s other functions.
Function
Synchronized pulse control
Synchronized pulse control
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Interrupt inputs
Can be used simultaneously.
Interval timer interrupts
Can be used simultaneously.
High-speed counters
Cannot be used simultaneously.
Interrupt inputs (counter mode)
Can be used simultaneously.
Pulse outputs
Cannot be used simultaneously.
Quick-response inputs
Can be used simultaneously.
Input time constant
See note.
Clock
Can be used simultaneously.
Note
When inputs 00000 and 00001 are set for use as synchronized pulse control in-
puts, the input time constant settings for the affected inputs are disabled. The
input time constants remain in effect, however, for the values for refreshing the
relevant input data area.
The relationship between the pulse input frequency and the pulse output fre-
quency is shown below.
Pulse input frequency
X
Frequency ratio
=
Rough pulse output frequency
10 to 500 Hz
20 Hz to 1 kHz
300 Hz to 20 kHz
Values are rounded off in units of 10 Hz.
A value less than 10 Hz is regarded as 0 Hz.
A value greater than 10 kHz is regarded as 10 kHz.
Pulse output frequency
(10 Hz to 10 kHz)
The scaling factor control cycle is 10 ms, and the pulse output frequency is
changed at intervals of 10 ms with respect to the pulse input frequency.
Frequency
Time
