Hitachi P1

Page 32
VFD CONTROL MODES
If you need to change the VFD control mode for testing, troubleshooting, or changing an open loop hoist to closed loop reference the
parameter chart below. Only choose the options provided below that are verified to be compatible with the DH firmware.
NOTE – Once you have changed the control mode it is recommended to cycle power.
IMPORTANT! – It is not recommended to change the control mode from closed loop to open loop unless for troubleshooting purposes
with an empty hook!
Function
Parameters
Value
VFD Control Mode
AA121
10: Closed Loop Vector
09: Open Loop 0-Hz Domain SLV
08: Open Loop SLV


IMPORTANT! – NEVER change a closed loop VFD to open loop with a load on the hook or load may fall!
MANUAL TORQUE BOOST / AUTOMATIC TORQUE BOOST PARAMETERS
 CT and 03 ATB.
Function
Parameter
Example Value

Hb140
00: Disabled
01: Always
02: Forward Direction
03: Reverse Direction

Hb141
0 – 20
(4.0 default)


Hb142
0 – 50
(4.0 default)

HC101
0 – 255
(100 default)

HC102
0 – 255
(100 default)