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Inverter Status Monitoring, Special Registers for
Control
4
PLC FUNCTION
4.7.3 How to write data by controlling (OFF to ON) the write
command
You can write the operation mode and set frequency to the inverter, batch-clear the
alarm definitions, and clear all parameters.
The above data are written as soon as the write completion turns on after the write
command has turned from off to on.
(Alarm definition batch clear (D9146) and all parameter clear (D9147) turn on at
completion of clear.)
To write the data again, the write command must be turned off once, then on again.
Data write timing chart
Device
No.
Name
Write
Command
Write
Completion
Data Access
Enable Condition
D9143 Operation mode setting write Y23 X23 Pr.79=0, 2
D9144 Set frequency write (RAM) Y24 X24 PU operation mode
(PU LED on) or CC-
Link operation mode
(PU and EXT LEDs
flicker slowly)
D9145
Set frequency write
(E
2
PROM)
Y25 X25
D9146 Alarm definition batch clear Y26 X26 Always
D9147 All parameter clear Y27 X27 As set in Pr. 77
X2n(n=3 to 7)
Write completion
D914n(n=3 to 7)
Write data
User data
Y2n(n=3 to 7)
Write command
1) In user sequence, user
data is stored into write
data area (D914n).
2) In user sequence, write
command is turned on.
4) After confirmation of write
completion, write command
is turned off.
3) Turns on when inverter CPU completes data
write to inverter.
Alarm definition clear and parameter
clear turn on at completion of clear.
0 written to D9150 indicates normal completion.
Any value other than 0 indicates abnormal completion.
5) Inverter CPU confirms that
write command is off and
turns off write completion.