YASKAWA E7U Programming Manual page 9

If A1-01 is configured for Advanced Access (A1-01= "2: Advanced Level"), then all menus and all parameters are shown. If
the Access Level Selection is set to Advanced, all parameters should be adjustable unless:
1. The Drive parameters are password protected (A1-04) which will prevent access to A1-00 through A1-03 and all A2
parameters.
2. A digital input has been configured as a Program Lockout (H1-0X= 1B) is active.
3. During serial communication writing, if a parameter change is also attempted via the digital operator, a
"BUSY - WRITE PROTECTED" message will display. Parameter change will not be possible from the digital operator until
an Enter command is received via the serial communication to finish the serial writing process.
A1-03 Initialize Parameters
Setting
0 No Initialize (factory default)
1110 User Initialize
2220 2-Wire Initialize
3330 3-Wire Initialize
The Drive can be set back to one of three default states via the A1-03 parameter.
1. User Initialization – 1110: The modified Drive parameters are returned to the values selected as user settings. User settings
2. 2-Wire Initialization – 2220: The Drive parameters are returned to factory default values with digital inputs S1 and S2
3. 3-Wire Initialization – 3330: The Drive parameters are returned to factory default values with digital inputs S1, S2, and S5
After an initialization is performed, parameter A1-03 will automatically be set back to 0.
S1
FWD Run/Stop
S2
REV Run/Stop
SN
2-wire control
2-wire control
Some parameters are unaffected by either the 2-Wire or 3-Wire initialization. The following parameters
IMPORTANT
will not be reset when parameter A1-03=2220 or 3330:
A1-00
E1-03
o2-04
Description
are stored when parameter o2-03= "1: Set Defaults".
configured as Forward Run and Reverse Run, respectively.
configured as Run, Stop, and Forward/Reverse respectively.
Fig. 1 2 & 3-Wire Control Wiring Examples
Language Selection
V/f Pattern Selection
kVA Selection
Programming 3
Stop
Operation
switch
switch
(NC contact)
(NO contact)
3-wire control
Run command
(run on momentary close)
Stop command
(stop on momentary open)
Forward/reverse command
(multi-function input)
SN
Sequence input common