bnp-b2365(eng)b.pdf - 第77页
2. Wiring and Connection 2 - 38 2-5-3 Main circuit control (1) Contactor ON sequence Main circuit power is turned ON in the sequenc e shown below when an emergency stop status is canceled. (2) Contactor shutoff sequence …
2. Wiring and Connection
2 - 37
2-5-2 Connecting the grounding cable
(1) Connecting the protective grounding (PE) and frame ground (FG)
Each unit has a terminal or mounting hole to connect PE (
) or FG.
Please connect an earth wire to the main ground of a cabinet or a machine frame at one point.
Ground each device according to the grounding conditions set forth by each country. (Typically, a
Y-connection neutral point ground is used in Europe.)
PE: Grounding to provide protection from electric shock, etc.
FG: Grounding to stabilize the operation of the devices, etc. (Suppress noise)
MDS-C1-V1/V2/SP
MDS-C1-CV
B-AL
SJ Series motor
HC Series motor
Grounding plate
POINT
Do not connect the grounding cable from
each unit directly to the grounding plate.
Noise from other units could result in
malfunctions.
(2) Grounding cable size
Earth wire size should follow the following table.
Type Grounding cable size (Required grounding)
MDS-C1-CV Unit Larger than thickness of wire connected to TE1 (L1/L2/L3). (PE)
MDS-C1-V1/V2/SP[] Unit Larger than thickness of wire connected to TE1 (U/V/W). (PE)
B-AL (AC Reactor) 5.5 mm
2
(AWG10) or more (FG)
Unit
Grounding
plate
Unit
Grounding
plate
2. Wiring and Connection
2 - 38
2-5-3 Main circuit control
(1) Contactor ON sequence
Main circuit power is turned ON in the sequence shown below when an emergency stop status is
canceled.
(2) Contactor shutoff sequence
When an emergency stop occurs, the NC checks the MC shutoff permission (motor stop or dynamic
brake operation) status for all axes and then shuts off the contactors. If there is no MC shutoff
permission output, the contactors are forced off 30 se conds later by their control units. Contactors
are shut off immediately if an alarm occurs.
OFF
ON
Emergency stop (EMG)
ON
OFF
Ready ON signal (READY)
ON
OFF
Servo ON signal (SERVO)
0
500 1000 1500
Time
(
ms
)
Command input enable
OFF
ON
Motor brake control output (CN20)
Dynamic brake
OFF
ON
Contactor control output (MC1)
ON
OFF
PN bus voltage
PN charging completed
Motor ON (GATE)
ON
OFF
Ready completion
Contactor ON sequence
Servo 1st axis
(Dynamic brake stop)
Servo 2nd axis
(Deceleration control)
Servo 3rd axis
(Drop prevention control)
0
0
0
MC shutoff
permission
Speed
MC shutoff
permission
Speed
MC shutoff
p
ermission
Speed
Contactor control output (MC1)
ON
OFF
Contactor shutoff sequence
Drop prevention
Shutoff after all-axes
permission check
OFF
ON
Emergency stop (EMG)
Spindle
(Deceleration stop)
0
MC shutoff
permission
Speed
2. Wiring and Connection
2 - 39
2-6 Wiring of the motor brake
2-6-1 Wiring of the motor magnetic brake
The magnetic brake of servomotors with a magnetic brake is controlled by the motor brake control
connector (CN20) on the servo drive unit. The servo drive unit releases the brake when the motor is ON.
(Servo ON means when torque is generated in the motor.)
(1) Motor brake release sequence
The motor brake control output (CN20: MBR) releases the magnetic brake in the sequences in the
following drawing when canceling the emergency stop. The brake is released after the start of the
power ON to the servomotor.
ON
Cancel
Emergency stop (EMG)
ON
OFF
Servo ready signal (RDY)
ON
OFF
Servo ready completion
signal (SA)
0
500 1000 1500
Time (ms)
Command input enable
Cancel
ON
Motor brake control
output (MBR)
Dynamic brake
Cancel
ON
Ready completion
Motor brake control sequences when an emergency stop is canceled
(2) Control during the servo OFF command
When a servo OFF command is input by an NC sequence input, the motor brake turns ON
simultaneously when the motor ON is shut off. Note that the vertical axis drop prevention control is
not validated, so a drop due to the brake operation lag occurs. When the servo OFF is canceled, a
drop due to an uncontrolled state does not occur.
SERVO ON
SERVO OFF
Servo OFF command
OFF
ON
Motor brake control output
CN20 connector (MBR)
Dynamic brake
OFF
ON
Motor ON (GATE)
ON
OFF
Motor brake control sequences when a servo OFF command is output
200ms
CAUTION
1. The vertical axis drop prevention control only is performed during an
emergency stop (including alarms and power failures). It is not performed
when a servo OFF command is input.
2. A servo OFF command is required at both axes in order to perform a motor
brake control output (MBR) at 2-axis drive unit.