Mitsubishi Electric A800 Programming Manual page 41

Special registers to monitor and control inverter status
POINT POINT
• This can be set in PU operation mode and NET operation mode. Refer to the Instruction Manual of the inverter.
<Program example of writing the setting frequency (RAM)>
The following description is of a program that changes the setting frequency (RAM) to 30 Hz.
Set frequency write (RAM) setting request
Setting frequency write (EEPROM) (SD1145)
The content of SD1145 is written to EEPROM as setting frequency. Its increment is 0.01 Hz.
(For example, 60.00 Hz is written as "6000".)
If the rotation rate is set, the increment is 1 r/min or 0.1 r/min according to the setting value of Pr.811. (FR-A800 series only)
The frequency can be set within the range of 0 to 12000 (0 to 120.00 Hz).
When frequency settings are written normally, the write completion signal (X25) turns ON at the same time as SD1150 is set
to "0".
Executing writing with any value that is outside the specified range causes the write completion signal (X25) to turn ON at the
same time as setting HFFFF in SD1150, resulting in error completion. If an error completion occurs, the setting frequency is
not changed.
POINT POINT
• This can be set in PU operation mode and NET operation mode. Refer to the Instruction Manual of the inverter.
<Program example of writing setting frequency (EEPROM)>
The following description is of a program that changes the setting frequency (EEPROM) to 10 Hz.
Set frequency write (EEPROM) setting request
NOTE
• When set frequencies need to be changed often, use the device SD1144 "set frequency (RAM)". There is a limitation on the
number of times EEPROM can be written to. (Approximately 100,000 times)
40
PLC Function
SD1150
SD1150
SD1150
SD1150
Turns ON set frequency
write (RAM) command pulse.
Check whether set frequency
write (RAM) completion signal is
Normal write
turned ON to judge whether write
was performed normally or not.
Abnormal write
Stores 3000 (30Hz) into SD1144,
and turns ON set frequency write
SD1144
(RAM) command.
(Until completion signal turns ON)
Turns ON set frequency write
(EEPROM) request pulse.
Check whether set frequency
write (EEPROM) completion signal is
Normal write
turned ON to judge whether write
was performed normally or not.
Abnormal write
Stores 1000 (10Hz) into SD1145,
and turns ON set frequency write
1000 SD1145 (EEPROM) command.
(Until completion signal turns ON)