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3 SPECIFICATIONS
3.2 Function List
Name
Linear counter function
Ring counter function
Coincidence output function
Coincidence detection
interrupt function
Preset function
Disable count
function
Latch counter
Counter
function
function
Sampling counter
selection
function
Periodic pulse
counter function
The functions can be used in combination. However, only either one of the linear counter function or ring
counter function can be used, and only one of the four counter functions can be selected.
3 - 4
The QD62(E/D) functions are listed below.
Values from –2147483648 to 2147483647 can be counted. If the count
exceeds the range, this function detects an overflow.
Repeatedly executes counting between the ring counter maximum and
minimum values.
Compares the coincidence output point of any preset channel with the
present counter value, and outputs the ON/OFF signal.
Generates an interrupt signal to the programmable controller CPU
when coincidence is detected, and starts the interrupt program.
Rewrites the present counter value to any numeric value.
Performs preset using the sequence program or external preset input.
Stops the pulse count while the count enable command is being
executed.
Stores the present counter value at the time the counter function
selection start command signal is input in the buffer memory.
Counts the pulses that are input during the preset sampling time
period from the time the counter function selection start command is
input, and stores the count in the buffer memory.
While the counter function selection start command signal is being
input, stores the present value in the buffer memory at preset interval.
Function
MELSEC-Q
Reference section
Section 5.2.1
Section 5.2.2
Section 5.3
Section 5.4
Section 6.2
Section 6.3
Section 6.4
Section 6.5
3 - 4
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