Omron FQM1-CM001, FQM1-MMA21 Section, Precautions when Using Pulse Outputs, Target frequency

Pulse Outputs						Section 7-6
Mode		Frequency changes	Description	Procedure		Example
				Instruc-	Settings
				tions
Stop	Frequency		Stops the pulse	SPED(88	Stop pulse	---
			output immedi-	5) or	output
	Present		ately.	ACC(888)
	frequency			or
				PULS(88
				6) (Elec-
		Time		tronic
	INI executed.			Cam Con-
				trol)
				↓
				INI(880)
	Frequency		Stops the pulse	SPED(88	Port,	---
			output immedi-	5) or	Continu-
	Present		ately.	ACC(888)	ous,
	frequency			↓	Target fre-
				SPED(88	quency = 0
		Time		5)
	SPED executed.
	Frequency		Decelerates the	SPED(88	Port,	---
			pulse output to a	5) or	Continu-
	Present	Acceleration/	stop.	ACC(888)	ous,
	frequency			↓	Accelera-
		deceleration rate
				ACC(888)	tion/decel-
	Target				eration
	frequency = 0	Time			rate,
		ACC executed.			Target fre-
					quency = 0

Note With ACC(888) and PLS2(887), the acceleration/deceleration rate’s speed-change cycle can be set to 2ms or 1 ms. Also, the acceleration/decel- eration rate can be set between 1 Hz and 9.999 kHz. Refer to 7-6-11 Acceler- ation/Deceleration Rates in ACC(888) and PLS2(887) Instructions for more details.

Precautions when Using Pulse Outputs

Pulses are output according to the clock frequency (20 MHz, 10 MHz, 5 MHz,

2.5MHz, or 1.25 MHz) specified in the System Setup (Pulse Output/Clock). The clock signal is divided by an integer dividing ratio to create and output the output pulse frequency. This means that the actual frequency may not be the same as the target frequency. Refer to the following information to calculate the actual frequency.

The following information is used to calculate the output frequency.

Target frequency:

Set by user.

Dividing ratio:

An integer set in the dividing circuit used to generate the output pulses at the target frequency.

Actual frequency:

The actual frequency that is output as generated by the dividing circuit.

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