Mitsubishi Electric MELSEC iQ-F Series

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2 HIGH-SPEED COUNTER MODULE FB

2.4 M+FX5-2HC_RotationSpeedMeasure (Rotation Speed Measurement)

FB details

Available device

Basic specifications

Processing

• By turning on i_bEN (Execution command), the rotation speed calculated based on the values of CH1 measurement unit

time (Un\G228 to Un\G229)/CH2 measurement unit time (Un\G428 to Un\G429), CH1 number of pulses per rotation

(Un\G230 to Un\G231)/CH2 number of pulses per rotation (Un\G430 to Un\G431) is read from the buffer memory.

• After i_bEN (Execution command) turns on, o_bOK (Normal completion) turns on when rotation speed measurement of the

target channel starts.

• When o_bOK (Normal completion) is on, if the rotation speed of the target channel is updated, o_bUpdate (Rotation speed

measurement value update flag) is turned on, and the updated value is stored in o_dRotationVal (Rotation speed

measurement value).

• o_bUpdate (Rotation speed measurement value update flag) is on for only one scan.

Target module Firmware Version Engineering tool

FX5UJ CPU module 1.060 or later GX Works3 Version 1.100E or later

FX5U CPU module 1.300 or later GX Works3 Version 1.100E or later

FX5UC CPU module 1.300 or later GX Works3 Version 1.100E or later

High-speed counter module 1.000 or later GX Works3 Version 1.100E or later

Item Description

Language Ladder diagram

Number of steps 570 steps

The number of steps of the FB embedded in a program depends on the CPU module used, the input/output definitions,

and the options setting of GX Works3. For the option settings of GX Works3, refer to the following.

GX Works3 Operating Manual

The amount of label usage • Label: 336 points (Word)

• Latch label: 0 points (Word)

The amount of labels used in the program varies depending on the CPU module used, the device specified in an

argument, and the option setting of GX Works3. For the option settings of GX Works3, refer to the following.

Mitsubishi Electric MELSEC iQ-F Series - Cyclic Transmission