bnp-b2365(eng)b.pdf - 第86页
2. Wiring and Connection 2 - 47 (2) Operation sequences of CN23 external emergency stop function If only external emergency stop is input when ex ternal emergency stop valid is set in the parameters (the emergency stop i…
2. Wiring and Connection
2 - 46
2-7-3 Wiring of an external emergency stop
(1) External emergency stop setting
Besides the emergency stop input from the NC communication cable (CN1A, CN1B),
double-protection when an emergency stop occurs can be provided by directly inputting an external
emergency stop to the CN23 connector on the power supply unit. Even if the emergency stop is not
input from CNC for some reason, the contactors will be shut off by the external emergency stop
input from CN23 connector on the power supply unit.
[1] Connection
[2] Setting
When using the external emergency stop, the rotary switch on the front of the power supply unit and
the parameter (PTYP) of drive unit that controls the power supply must be set.
• Rotary switch setting: 4
• Parameter setting: Add "0040" to the setting of PTYP (Servo=SV036, Spindle=SP041).
Parameter settings
No.
Abbrevia-
tion
Parameter name Descriptions
SV036
SP041
PTYP Power supply type
When external emergency stop is validated, 0040 [hex] is added to PTYP for the drive
unit connected to the power supply unit.
CAUTION
The emergency stop signal input to the CNC side cannot be used as a substitute
for the external emergency stop function (CN23).
Mitsubishi NC
External emergency stop input
MDS-C1-V1/V2/SP
CN1A
CN4
MDS-C1-CV
CN4
CN1B
1 EMG1
2
N
C
3 EMG2
MC1
Emergency
stop
Alarm
Alarm
Contactor shutoff
command
CN23
MC1
L
21
L
11
SV1,2
SH21
FCUA-R000
FCUA-R000
SH21
Emergency
stop
2. Wiring and Connection
2 - 47
(2) Operation sequences of CN23 external emergency stop function
If only external emergency stop is input when external emergency stop valid is set in the
parameters (the emergency stop is not input in NC), an "In external emergency stop" (warning EA)
will be detected. At this time, the system itself does not enter an emergency stop status. (There will
be no deceleration control or dynamic brake stop.)
If a contactor shutoff command is not issued from the NC within 30 seconds after the external
emergency stop is input, the power supply unit output s contactor shutoff signal (MC1), and then it
shuts off the contactors, and a power supply error (alarm 6F) is detected simultaneously. If the
emergency stop is input from NC within 30 seconds, the warning EA replaces the "In NC
emergency stop" (warning E7). A normal emergency stop status will result if the contactor shutoff
command from the NC are further input.
Ready ON is possible even if CN23, an external emergency stop has been input when the
emergency stop is canceled, but an power supply error (alarm 6F) will occur after 30 seconds.
OFF
ON
External emergency stop input
(EMGX)
Servo drive unit st atus displ a y
Contact or cont rol terminal (MC)
ON
OFF
Motor speed
0
OFF
ON
Main emergency stop i nput
(EMG)
dx E7 EA
Deceleration control
Contactor control command
ON
OFF
Cx
→
dx
External emergency stop input sequences
OFF
ON
ON
OFF
0
OFF
ON
dx 6F, E7 EA
Dynamic brake
ON
OFF
The communication line enters an
emergency stop state by the output
from the servo.
0 30
Time (s)
External emergency stop input
(EMGX)
Servo drive unit status display
Contactor control terminal (MC)
Motor speed
Main emergency stop input
(EMG)
Contactor control command
When neither a main emergency stop nor contactor shutoff command is input
2. Wiring and Connection
2 - 48
(3) Example of emergency stop circuit
[1] Outline of function
The power supply unit's external emergency stop can be validated by wiring to the CN23 connector,
and setting the parameters and rotary switch. If the emergency stop cannot be processed and the
external contractor cannot be shut off (due to a fault) by the NC unit, the external contactor can be
shut off by the power supply unit instead of the NC. At this time, the spindle motor will coast and the
servomotor will stop with the dynamic brakes.
EN60204-1 Category 1 can be basically complied with by inputting the external emergency stop
and installing contactor.
CAUTION
1. The power supply unit external emergency stop function is a function that
assists the NC emergency stop.
2. It will take 30 seconds for the external contactor to function after the
emergency stop is input to CN23. (This time is fixed.)
[2] Outline of function
The emergency stop is a signal used to
stop the machine in an emergency. This
is connected to the NC unit. Wire to the
power supply unit when necessary.
The servo/spindle unit will be decelerated
and controlled by the software according
to the emergency stop command issued
from the NC unit. (The deceleration
control depends on a parameter setting.)
The diagram on the right shows an
example of the emergency stop circuit
(EN60204-1 Category 0 stop) in which an
off delay timer (TM1) is installed as a
power shutoff method independent from
the NC emergency stop input. The
required safety category may be high depending on the machine and the Safety Standards may not
be met. Thus, always pay special attention when selecting the parts and designing the circuit.
[3] Setting the off delay timer (TM1) tim e
Set the TM1 operation time so that it functions after it has been confirmed that all axes have
stopped. If the set time is too short, the spindle motor will coast to a stop.
tm ≥ All axes stop time
Provide a mechanism that shuts off the power even if the NC system fails.
POINT
Stop Categories in EN60204-1
Category 0: The power is instantly shut off using machine parts.
Category 1: The drive section is stopped with the control (hardware/software
or communication network), and then the power is instantly shut
off using machine parts.
(Caution) Refer to the Standards for details.
Refer to Section 9.2.5.4.2 in EN60204-1: Safety of Machinery
Electrical Equipment of Machines – Part 1.
GND
R
R
GND
External
Emergency
Switch
TM1
RA1
MBR*
EMG
CUP
&
ASIC
SV1/2
CN23
Hardware Emergency
Software Emergency
NC Unit
Power Supply
Unit
Servo/Spindle
Drive Unit
CN1A/B
CUP
&
ASIC
CUP
&
ASIC
MC-OF F*
MC1
L1
L2
L3
L21
L11
CN4
CN4
CN20
MBR*
Motor
Brake
AC Reactor
External
Contactor
MC
L21
L11
P
N