Delta AS Series Programming Manual page 1203

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8. There is no limit to the number of times you can use this instruction; but the high-speed input and output points
cannot be used by other instructions when this instruction is executed. Otherwise, the instruction cannot be
executed.
9. The instruction cannot be used in the ST programming language, interrupt tasks or function block which is called
only once.
Notes
1. The PLC calculates the input pulse frequency based on the input pulse width (ON) in the positive half cycle. If the
proportion of the pulse width for ON:pulse width for OFF is not 1:1, the PLC takes the ON width as the standard for
conversion by default.
2. The input pulse=ON means the input point LED is on. When using the MPG but it has not rotated yet, you can check
if the input point LED is OFF and the flag for reversing the input direction is activated .
3. For PLC with FW V1.04.70 (V1.04.70 included) or later, the minimum pluse frequence for input and output is 50 Hz.
If the actual input pulse is 10 Hz and the value in S
is 50 Hz, the instruction uses 50 Hz instead of 10 Hz to calculate. For the ratio 1:2, after conversion, the output pulse
is 100 Hz. For the ratio 2:1, after conversion, the output pulse is 50 Hz instead of 25 or 5 Hz.
4. You can modify values in S
to actualize this modification. Otherwise the value in S
_6
output position of SR.
5. After conversion, if the output pulse frequecne exceeds the maximum limit, the error code is recorded as 16#2030 in
Error Log File in ISPSoft and SM29 is ON. SR29 is the axis number. This function is available for PLC with FW
V1.06.20 (V1.06.20 included) or later.
6. If the input pulse is 0 Hz and lasts for more than 2 seconds, PLC stops outputting automatically and the error code is
recorded as 16#2031 in Error Log File in ISPSoft and SM29 is ON. SR29 is the axis number. This function is
available for PLC with FW V1.06.20 (V1.06.20 included) or later.
Example 1
X0.0/X0.1 input pulses for detecting the MPG. When M0 is ON, the setting values of S
D5=1). When the input frequency is 10 Hz (D2, D3=10) and the number of pulses is 10 (D0, D1=10), the output axis
(Y0.0/Y0.1) outputs 10 pulses (SR460, SR461=10) at 10Hz (D10, D11=10).
6 - 9 2 4
shows 10 Hz. But since the minimum pulse frequence for output
3
or S during the execution of this instruction. But you need to re-execute this instruction
4 5
2
is not accurate enough to be used for calculating the current
and S
4
are both 1 (D4=1 and
5