Yaskawa E7B Drive Bypass System - Manual (Page 45)

Yaskawa Electric America, Inc.
Installation Guide IG.E7B.02 Rev: 04-11
Date: 11-1-04 Page 43 of 46
Fig 1.18 Overload Relay Detail
2. Apply power to the Drive and Bypass package. Using a VOM, ensure that all three phases are present and
that the input voltage is correct for the system being set up. When power is applied to the E7B unit, the con-
trol logic will briefly (<3 seconds) self test all the control panel operating mode LEDs, located on the lower
half of the control panel. Then, the SEQ and REF LEDs (red), DRIVE menu LED (red), STOP LED (red),
Control Power LED (green), Ready LED (green), Drive Select LED (green) and OFF LED (amber) will be
lit when the Drive and Bypass are ready for operation. The alpha/numeric display will show input frequency
(speed command), at power up. [Note: If the Motor O/L LED (red) is lit, press the reset button on the motor
overload relay.]
3. Various menus are directly available by pressing the MENU key (see Chapter 3). When in the DRIVE menu,
the Drive can accept a run command from local (Hand mode) or remote (Auto mode) sources. Press the
MENUkey until the ADV/PRGM menu LED (red) is lit. From here, any of the E7 parameters can be
accessed and changed using the
, , and DATA/ENTER keys. See Appendix A (TM.E7B.01) for a list of
programmable features. The VERIFY menu can be used to review or modify only those parameters that
have been changed from the Drive’s default values. Using the
, , and DATA/ENTER keys as needed,
verify that the parameters are correct for the Drive and installation conditions. See the Factory Parameter
Settings printed in Table 1 and Table 6 on page 2 and 3 of the E7B-10 Schematic Diagram. Consider any
additional parameter settings that may be needed by this specific application.
The Factory Parameter Settings, table 1, documents E7 Drive parameter settings, required to interface
with the Bypass logic circuit, that have been established at the factory and stored in a dedicated location
in the E7 memory as “UserInitialization” values (think of it as a “back-up file”). If additional parameters
are set to the specific needs of theapplication project, and the system operation has been checked and ver-
ified, then the “User Initialization” values should be stored in memory again by entering “1: Set Default”
in parameter o2-03.
When there is a need for re-initialization (resetting to a known factory starting point for troubleshooting
purposes) of the E7 Drive, then a 2-wire initialization should be carried out by entering “2220: 2 Wire Ini-
tial” in parameter A1-03, followed by entering the “1110: User Initialize” function, also in parameter A1-
03. This will re-establish the E7 Drive set-up required for the E7B Bypass application and any “user”
parameter values that have been stored.
IMPORTANT
To maintain overcurrent, short-circuit, and ground-fault protection, the manufacturer’s instructions
for setting the motor OLR must be followed.
Adjustment Dial
Test Button
Reset Button