YASKAWA E-V Series User Manual page 97

4 Operation
4.6.1 Hard Wire Base Block (HWBB) Function
(3) Resetting the HWBB State
By receiving a servo ON command (SV_ON: 31 H) again after both /HWBB1 and /HWBB2 signals are turned
ON, the SERVOPACK returns to normal operation status.
If a servo ON command (SV_ON: 13 H) is sent while the SERVOPACK is in the HWBB status, the SERVO-
PACK can be returned to normal operational status by sending commands other than servo ON commands
(SV_ON: 31) such as a servo OFF command (SV_OFF: 32H) after both /HWBB1 and /HWBB2 signals are
turned ON and by resending a servo ON command (SV_ON: 31 H).
Note: Even if the Servo turns OFF after turning OFF the main circuit power, the HWBB status remains until a servo OFF
command (SV_OFF: 32 H) is received.
(4) Related Commands
If the HWBB function is working with the /HWBB1 or /HWBB2 signal turned OFF, the setting of IO monitor-
ing field D10 (HBB) changes to 1, so the status of the upper level apparatus can be known by looking at the
setting of this bit.
If the status becomes HWBB status during the execution of the next command, a command warning is issued.
If a warning is given, clear the alarm to return to normal operational status. After stopping or canceling the
action command, using the sequence of commands to return to the HWBB status is recommended.
Object Action Commands
Servo ON (SV_ON)
Interpolating (INTERPORATE)
Positioning (POSING)
Constant speed feed (FEED)
Interpolating with position detection function (LATCH)
External input positioning (EX_POSING)
Homing (ZRET)
(5) 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.
4-24
/HWBB1
OFF
/HWBB2
M-II SMON
Command Command, etc.
Status field
SVON
0
IO monitor field
1
HBB
SERVOPACK
HWBB state
state
ON
SV_ON
Command
1
0
BB state Operation