Inverter Status Monitoring, Special Registers for Control

1.7.2Data that are read by controlling (OFF to ON) the read

command

You can read the operation mode and set frequency of the inverter.

Device

Name

Read

Write

Data Access

No.

Command

Completion

Enable Condition

 

D9140

Operation mode setting read

Y20

X20

Always

D9141

Set frequency read (RAM)

Y21

X21

D9142

Set frequency read (EEPROM)

Y22

X22

 

Data are stored into the above data devices as soon as the read completion turns from off to on after the read command has turned from off to on.

If the read command remains on, data is not refreshed. (Data is not updated.) Turn the device off once, then on again to refresh data.

Data read timing chart

 

3) In user sequence, ON of read completion

1) Read command is turned

is confirmed and data is read from special

on in user sequence.

register and processed.

4) After completion of read,

 

 

 

 

read command is turned off.

Y2n(n=0 to 2)

 

 

Read command

 

 

X2n(n=0 to 2)

 

 

Read completion

 

 

D914n(n=0 to 2)

 

 

Read data

 

 

User sequence

 

 

processing

 

 

2) Inverter CPU stores inverter data

5) Inverter CPU confirms that

into special register and turns on

read command is off and

read completion.

turns off read completion.

(1) Operation mode setting read (D9140)

Data Setting

Operation Mode

H0000

NET operation mode

H0001

External operation mode

H0002

PU operation mode

REMARKS

When the Pr. 79 "operation mode selection" setting is other than "0", the operation mode is as set. However, when Pr. 79 = "3" or "4", the operation mode is "H0002" (PU operation mode).

<Operation mode setting read program example>

The following program reads the operation mode data to D0.

1

PLC FUNCTION

Operation mode read setting request

Turns on operation mode read request pulse.

Stores operation mode data to D0 when operation mode setting read completion signal turns on.

Turns on operation mode setting read command. (Until operation mode setting read completion signal turns on)

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Mitsubishi Electronics FR-A700, 700 Series specifications Data read timing chart, Operation mode setting read D9140