YASKAWA E-V Series User Manual page 175

5 Operation
5.11.1 Hard Wire Base Block (HWBB) Function
(2) Hard Wire Base Block (HWBB) State
The SERVOPACK will be in the following state if the HWBB function operates. If the /HWBB1 or /HWBB2
signal is OFF, the HWBB function will operate and the SERVOPACK will enter a hard wire baseblock
(HWBB) state.
SERVOPACK
state
(3) Resetting the HWBB State
Usually, after a baseblock state is set (servomotor turned OFF) with the servo OFF command, the SERVO-
PACK will enter an HWBB state with the /HWBB1 and /HWBB2 signals turned OFF. By turning /HWBB1
and /HWBB2 signals ON in this state, the SERVOPACK will enter a baseblock (BB) state and can accept the
servo ON command.
SERVOPACK
state
If the /HWBB1 and /HWBB2 signals are OFF and the servo ON command is input, the HWBB state will be
maintained after the /HWBB1 and /HWBB2 signals are turned ON.
Input the servo OFF command and set the SERVOPACK to BB state. Then input the servo ON command
again.
SERVOPACK
state
Note 1. If the SERVOPACK is set to BB state with the main power supply turn OFF, the HWBB state will be maintained
2. The HWBB state cannot be reset if the /S-ON signal is set to be constantly enabled in the /S-ON signal allocation
(4) Error Detection in HWBB Signal
If only the /HWBB1 or /HWBB2 signal is input, an A.Eb1 alarm (Safety Function Signal Input Timing Error)
will be occur unless the other signal is input within 10 seconds. This makes it possible to detect failures, such
as disconnection of the HWBB signals.
Note: The A.Eb1 alarm (Safety Function Signal Input Timing Error) is not related to the safety function. Keep this in mind
in the system design.
5-72
/HWBB1
/HWBB2
/S-ON ON
Operating
/HWBB1
OFF
/HWBB2
/S-ON OFF
HWBB state
/HWBB1
OFF
/HWBB2
/S-ON ON
HWBB state
until the servo OFF command is input.
(Pn50A.1). Do not make this setting if the HWBB function is being used.
ON OFF
OFF
BB state HWBB state
ON
BB state
ON
OFF
ON
Operating
ON
BB state Operating