n The Servomotor will move if an external force is applied to it (for example, gravity on
a vertical axis). Implement measures to hold the Servomotor, such as installing a sep-
arate mechanical brake.
n If a failure occurs such as a Power Module failure, the Servomotor may move within
an electric angle of 180°. Ensure safety even if the Servomotor moves.
The rotational angle or travel distance depends on the type of Servomotor as follows:
– Rotary Servomotor: 1/6 rotation max. (rotational angle calculated at the motor
shaft)
– Direct Drive Servomotor: 1/20 rotation max. (rotational angle calculated at the
motor shaft)
– Linear Servomotor: 50 mm max.
n The HWBB does not shut OFF the power to the SERVOPACK or electrically isolate it.
Implement measures to shut OFF the power supply to the SERVOPACK before you
perform maintenance on it.
12.3.3 Hard Wire Base Block (HWBB) State
The SERVOPACK will be in the following state if the HWBB operates. If the /HWBB1 or /
HWBB2 signal turns OFF, the HWBB will operate and the SERVOPACK will enter a
HWBB state.
Statusword
(6041h)
Controlword
(6040h)
Disable Operation
Enable
Operation
0 1
Digital inputs
(2521h, bits 8 and 9)
0 1
Statusword
(6041h, bit 14)
S3: Switched on
S1: Switching On
Inhibited
S4: Operation
Statusword
(6041h)
Controlword
(6040h)
Enable Operation
S1: Switching On Inhibited
S4: Operation
/HWBB1
/HWBB2
/HWBB1
/HWBB2
• When HWBB Operates after Servo OFF (Power Not Supplied to Motor)
• When HWBB Operates While Power Is Supplied to Servomotor
ON (normal
operation)
SERVOPACK
Status
Operating Status
HWBB state
OFF (motor current shut-OFF request)
ON (normal operation)
SERVOPACK
Status
Operating
Status
BB state
HWBB state
OFF (motor current
shut-OFF request)
Fig. 343: Hard Wire Base Block (HWBB) State
Sigma-7 Series SERVOPACKs
Safety Functions
Hard Wire Base Block (HWBB and SBB) > Hard Wire Base Block (HWBB) State
| | PROFINET Communications - SIEP YEUOC7P 02A Revision 0 | en | 469
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