3.2 Servo Commands
3.2.3 Release Brake Command (BRK_OFF: 22h)
3-28
Brake Signal Output Timing
Operation for MECHATROLINK Communications Errors
If any of the MECHATROLINK communications errors listed in the following table occurs when
the brake signal is being controlled by the BRK_OFF or BRK_ON command, the brake signal
will be output according to the setting of Pn884 = n.
X (MECHATROLINK Communica-
tions Error Holding Brake Signal Setting). If any other alarm occurs, the status that is set for the
BRK_ON or BRK_OFF command will be maintained regardless of the setting of Pn884 =
n.
X.
Parameter Setting
Set the operation for a MECHATROLINK communications error using the following parameter.
•
Normally, brake signals are controlled by the SERVOPACK parameters.
•
BRK_ON and BRK_OFF commands are always valid as command as long as no warning
occurs.
•
Always make sure of the status of brake control command when using BRK_ON or BRK_OFF
command.
Sending BRK_OFF command while the servomotor is being powered (servo ON) will not change
the operation status. However, it is very dangerous to send SV_OFF command in the above sta-
tus since the brake is kept released.
Alarm Number
Alarm Name
A.E50
MECHATROLINK Synchronization Error
A.E60
Reception Error in MECHATROLINK Communications
A.E61
Synchronization Interval Error in MECHATROLINK Transmission Cycle
A.E62
FCS Error in MECHATROLINK Communications
A.E63
MECHATROLINK Synchronization Frame Not Received
Parameter
Meaning
When Enabled
Classification
Pn884
n.
0
[Factory set-
ting]
Maintain the status set by the BRK_ON or
BRK_OFF command when a MECHATROLINK
communications error occurs.
Immediately
Setup
n.
1
Apply the holding brake when a MECHA-
TROLINK communications error occurs.
/BK
BRK_OFF
/BK
BRK_ON
Within 2 m
s
Within 2 m
s
Important