Omron FQM1-MMA21, FQM1-CM001, FQM1-MMP21 7-9Analog Input Functions, 7-9-1, 7-9-2, Section

Analog Input Functions Section 7-9

7-8-4 Application Example

Positioning or Speed Control Using a Virtual Axis

The internal pulse count can be treated as a virtual axis position in order to perform electronic cam operation on the real axis operation with simple curve approximation.

First, the AXIS instruction is executed to generate an internal pulse count. The internal pulse count is read at every cycle, that pulse count is processed with basic arithmetic operations or the APR instruction, and the result is used as a target position or target speed in the PULS(886) instruction. The PULS(886) instruction (in electronic cam control) is executed immediately after the target position or speed is calculated.

Internal pulse frequency
(Speed command)		Pulse count
	Pulses generated	(Virtual pulses)
	by AXIS

Target frequency (Hz)

Time Time

Execution of AXIS

Execute constant cycle time

Pulse output PV (normal pulse output)

Execution of PULS (Changes target position and speed.)

Target position

PULS (Electronic Cam Mode) is executed in the program with changed target position and speed.

Time

Simple locus control can be performed by executing electronic cam control simultaneously on both pulse outputs 1 and 2 using the same virtual axis as above.

7-9 Analog Input Functions

7-9-1	Applicable Models
		Model	Functions
		FQM1-MMA21	Motion Control Module for Analog I/O
7-9-2	Overview

The FQM1-MMA21 Motion Control Module can input analog input signals at high-speed (A/D conversion time: 40 ∝s).

One of five signal types for analog inputs can be selected: −10 to +10 V, 0 to 10 V, 0 to 5 V, 1 to 5 V, and 4 to 20 mA.

Analog input values are stored in the Motion Control Module’s Auxiliary Area in A550. The stored input value is the analog input value read at END refresh- ing. It is also possible to adjust the analog input values.

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