Estun E21 User manual

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E21 Press Brake Numerical Control Device
Installation Manual
V1.01
ESTUN AUTOMATION CO.,LTD
Address ：No.155 Jiangjun Road, Jiangning
Development Zone Nanjing P.R.C 211106
Postal code：211106
TEL：[phone]
FAX：[phone]
WEB：www.estun.com
E-mail：[email protected]

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Document Revision Record
Serial
No.
Version
No.
Revision
Date
Description Revised by Appr
oved
by
Remarks
1 V1.00 2012-6-4 Yao Qing
2 V1.01 2012-6-6 Update
Assembly
Drawings
Yao Qing

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Preface
Target reader
This manual is applicable to operators of E21 press brake machine numerical
control device, including:
Machine tool operators
Installation and maintenance personnel
Range of application
Installation and maintenance personnel can install and operate this device
properly by referring to this manual.
Regulation
The design of E21 press brake machine numerical control device complies
with the following grade standard:
Grade standard of EMC test:
1. GBT 17626.2-2006 Electromagnetic compatibility（EMC）- Testing and
measurement techniques - Electrostatic discharge immunity test.
Grade 3, contact discharge ±4KV，air discharge ±8KV.
2. GBT 17626.4-2008 Electromagnetic compatibility - Testing and
measurement techniques - Electrical fast transient/burst immunity test
Grade 3, power port ±2KV，communication port ±1KV.
3. GBT 17626.3-2006 Electromagnetic compatibility - Testing and
measurement techniques - Radiated radio-frequency electromagnetic
field immunity test
Grade strength：10V/m，criteria：Grade A.
4. GB/T 17626.8-2006 Electromagnetic compatibility(EMC) - Testing
and measurement techniques - Power frequency magnetic field immunity
test
30A/m，50～60HZ，criteria：Grade A.
5. RE Test，reference standard EN55011
Execute CLASS A standard.
Environmental test standard
6. Low temperature; refer to JB-T 8832-2001 General requirements for
numerical control systems of machine tools, 0 , 2hours. Low℃
temperature store -20 . Criteria: normal start up, normal operation.℃
7. High temperature, refer to JB-T 8832-2001 General requirements for
numerical control systems of machine tools, 40 , 2hours. High℃
temperature store 55 . Criteria: normal operation.℃
8. Constant temperature wet, refer to JB-T 8832-2001 General requirements
for

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numerical control systems of machine tools, 40 , humidity 93%~95%℃，
2 hours. Criteria: normal operation.
9. Vibration impact, refer to JB-T 8832-2001 General requirements for
numerical control systems of machine tools.
Personnel
Only authorized and properly trained person is allowed to operate this
equipment. Any person without necessary training is not allowed to use this
control system, not even for temporary use.
Area of responsibility distributed for personnel participating in installing,
operating and servicing equipment shall be stipulated explicitly and be
confirmed eligible.

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Content
Preface ..........................................................................................................................3
1 Specification.............................................................................................................7
1.1 Display ...................................................................................................................................7
1.2 Internal memory.....................................................................................................................7
1.3 Electrical specification...........................................................................................................7
1.4 Encoder specification.............................................................................................................8
2 Installation ...............................................................................................................9
2.1 Annoucements before installation ..........................................................................................9
2.2 Installation space and direction..............................................................................................9
2.3 Installation environment ........................................................................................................9
2.4 Installation dimension..........................................................................................................10
2.5 Installation layout.................................................................................................................10
2.5.1 Layout of rear panel....................................................................................................10
2.5.2 Rear panel port description ......................................................................................... 11
2.5.3 Overall wiring scheme ................................................................................................12
2.5.4 Electrical wiring scheme.............................................................................................12
2.6 Definition of system interface..............................................................................................13
2.6.1 Definition of power interface......................................................................................13
2.6.2 Definition of input interface .......................................................................................13
2.6.3 Definition of external output interface........................................................................15
2.6.4 Definition of encoder interface ...................................................................................15
2.6.5 Definition of communication interface.......................................................................16
3 Parameter Description of Machine Tool ..........................................................17
3.1 Enter parameter page ...........................................................................................................17
3.2 Parameter specification ........................................................................................................18
4 Debugging..............................................................................................................22
4.1 Preparation before debugging ..............................................................................................22
4.2 Debugging procedure...........................................................................................................22
4.3 Debugging............................................................................................................................22
4.4 Actual processing .................................................................................................................24
5 Diagnosis ................................................................................................................25
5.1 Enter diagnosis page ............................................................................................................25
5.2 Input diagnosis.....................................................................................................................25
5.3 Output diagnosis ..................................................................................................................26
5.4 Keyboard diagnosis..............................................................................................................26
5.5 FRAM diagnosis ..................................................................................................................27
5.6 Encoder diagnosis ................................................................................................................28
5.7 LCD diagosis .......................................................................................................................28

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6 Maintenance...........................................................................................................29
6.1 Instructions to maintenance .................................................................................................29
6.2 Routine inspection ...............................................................................................................29
6.3 Periodic inspection...............................................................................................................30
7 Appendix ................................................................................................................32
7.1 External power description ..................................................................................................32
7.2 Grounding design.................................................................................................................32
7.2.1 Ground classification in equipment cabinet................................................................32
7.2.2 Equipment grounding design ......................................................................................33
7.3 Protective measures..............................................................................................................34
7.3.1 Measures to ensure electromagnetic compatibility .....................................................34
7.3.2 Instructions to E21 electricmagnetic compability installation ....................................36
7.3.3 Install freewheeling diode on relay.............................................................................36
7.4 Demonstration of AC Asynchronism motor wiring .............................................................36

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1 Specification
1.1 Display
LCD display
Dimension of display window：54.38mm*54.38mm
Dot matrix：160*160
Status light
Green indicates running；
Red indicates stop.
1.2 Internal memory
Capable of storing 40 programs, each program includes 25 steps at most.
1.3 Electrical specification
POWER
Input voltage：DC24V±10%
Rated current：1A
INPUT
Input voltage：DC24V±10%
Maximum input current：10mA
OUTPUT
External voltage：DC24V±10%
Maximum current：70mA

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Encoder power
Output voltage：DC12V±5%
Allowable maximum output current：500mA
Absolute temperature：
Working temperature：0～40℃
Storage temperature：-20～55℃
1.4 Encoder specification
Power supply is DC 12V；
Incremental encoder，single-ended output，with Z/C phase；
Voltage-type output

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2 Installation
2.1 Annoucements before installation
Power supply must be off during installation and wiring.
Serious damage to the equipment may be caused by misconnection of
power supply terminals, improper connection of in-out lines and output
line short circuit. Therefore, before turning on the power supply, check
the connection of input output grounding and power supply wire. .
Grounding terminal of E21 digital control device must be grounded in
correct way, with low impedance lower than 0.3Ω.
Do not dismantle the device without authorization so as to avoid
malfunction.
Electrical components inside the digital device are very sensitive to static
electricity, therefore do not put foreign matters or make them fall to the
inside of digital control device or touch the control circuit.
Please install E21 digital control device in safe region. Avoid high
temperature, and direct sunlight, moisture and splash of oil drops or
water.
Do not use this device in place of high temperature, moisture
condensation, dust, oil smoke, conductive dust, corrosive gas or
flammable gas.
2.2 Installation space and direction
Generally, E21 bending machine digital control device is embedded on control
panel, keep a distance of 65mm from its neighboring components and damper
(shell) on up and down, right and left, to facilitate operator install and
maintain the device.
2.3 Installation environment
Place free from water, vapor, dust or oily dust.
Place free from flammable, explosive or corrosive gas.
Place free from interference of strong electromagnetism or noise.
Ambient temperature is between 0℃- 40 . When ambient temperature is℃
over 40 , please put it in well℃-ventilated place.
Relative humidity is under 90%RH.

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2.4 Installation dimension
The installation method is panel-mounting. Installation dimension and
drawings are shown in Figure 2-1.
Figure 2-1 Panel Installation Dimension
2.5 Installation layout
2.5.1 Layout of rear panel
Rear panel block diagram is shown in Figure 2-2, consisting of power port
(POWER), input port (INPUT), output port (OUTPUT), encoder port (X, Y),
and communication port (COMM).

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Figure 2-2 Rear panel layout
2.5.2 Rear panel port description
Rear panel port description is shown in Table 2-1.
Table 2-1 Rear panel port description
Socket number External port name External port description
CN1 POWER Input terminal of system power.
CN3 OUTPUT
13 way. 24VDC, maximum drive
capability 70mA, opto-coupler
isolation, maximum withstanding
voltage 40V.
CN2 INPUT
7 way. 24VDC, maximum load
10mA, opto-coupler isolation,
maximum withstanding voltage
40V.
CN5 X-ENCODER
Incremental encoder is 12V
single-ended output, with pulse
frequency up to 100KHz.
Meanwhile, the port supplies
power externally (as input power
of encoder). The rated voltage is
12V, rated current 150mA, and
ripple voltage no higher than
100mV.

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Socket number External port name External port description
CN6 Y-ENCODER
Incremental encoder is 12V
single-ended output, with pulse
frequency up to 100KHz.
Meanwhile, the port supplies
power externally (as input power
of encoder), rated voltage 12V,
rated current 150mA, ripple
voltage no higher than 100mV.
CN4 RS232 For updating the system software.
2.5.3 Overall wiring scheme
Overall wiring scheme is shown in Figure 2-3.
Figure 2-3 Overall wiring schemes
2.5.4 Electrical wiring scheme
Electrical wiring scheme is shown in Figure 2-4.

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Figure 2-4 Electrical wiring schemes
It is recommended to use the relay which contains diode on coil, avoid high
voltage damage the circuit when cutting inductive load.
Shield layer of the encoder cable shall be connected to ground, which is the
metal housing of the product, with low resistor.
2.6 Definition of system interface
2.6.1 Definition of power interface
Definition of terminal is shown in Table 2-2.
Table 2-1 Description of power terminal
Terminal No. Signal Description
1 24V Input terminal of system power，
connect to DC +24V.
2 0V Input terminal of system power,
connect to DC 0V.
3 PE PE
2.6.2 Definition of input interface
Pin definition is shown in Table 2-3.

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Table 2-1 Definition of external output terminal
Terminal No. Signal Description
1 START
Step change signal, DC +24V
signal input, connect to upper dead
point signal generally,beam return
to upper dead point, +24V signal is
connected, system receive step
change signal, system callout the
next program and execute the
program.
2 PRESS
Back gauge retraction, signal, DC
+24V signal input, avoid
interfering work piece by gauge
device during work. System X/Y
axle positioning is finished, and
slider gets away from upper dead
point. When slide just press against
sheet, retraction signal is
connected. Back gauge will yield
some distance to direction of up
counting (yield distance is
determined by program retraction
value), avoid interference by back
gauge and work piece. When
bending is finished and slide
return, back gauge will return from
yield position.
3 X-EOT
X-axle reference point signal, DC
+24V signal input, connect to rear
limit signal generally. When gauge
touches reference point switch,
+24V signal is connected.
4 Y-EOT
Y-axle reference point signal, DC
+24V signal input, connect to low
limit signal of Y-axle block
generally. Block touches reference
point switch, +24V signal is
connected.
5 COUNT
Piece counting signal, input
DC+24V signal, and connect to
upper dead point signal generally.
Slider return to upper dead point,
+24V signal is connected, one
count is completed. Then signal
must be connected, otherwise the
system will not operate normally.
6 NC1 Retain
7 MRDY Retain
8 NC2 Retain

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Terminal No. Signal Description
9 COM1
Common port of system input
signal must be connected to 0V of
I/O power.
2.6.3 Definition of external output interface
Terminal definition is shown in Table 2-4.
Definition of external output terminal
Terminal No. Signal Description
1 X―― X axle high speed reversal
2 X―X axle low speed reversal
3 X＋X axle low speed forward
4 X＋＋ X axle high speed forward
5 XIP X axle in place
6 Y―― Y axle high speed reversal
7 Y―Y axle low speed reversal
8 Y＋Y axle low speed forward
9 Y＋＋ Y axle high speed forward
10 YIP Y axle in place
11 SRDY System is ready to output
12 EH End of holding time
13 ER End of decompression
14 24V Connect 24V+ of external IO
power
15 COM2 Common port of system output
signal must connect to 0V of I/O
power supply.
2.6.4 Definition of encoder interface
Encoder interface is DB-9 plug (female), definition of terminal is shown in
Table 2-5.

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Table 2-1 Definition of encoder terminal
Communication
mode Incremental encoder terminal
Pin No. 3 4 5 1, 6, 8, 9 2, 7
Signal definition C B A GND 12V
GND of encoder cable can be connected to any pin among 1, 6, 8, 9;
VCC of encoder cable can be connected to either 2 or 7;
2.6.5 Definition of communication interface
The system has integrated RS232 serial interface, port adopts DB-9 plug
(male).
Note: this RS232 is for upgrading system software only.
Terminal definition is shown in Table 2-6.
Table 2-1 Definition of communication terminal
Communication
mode RS232
Pin No. 2 3 5 1, 4, 6, 7, 8, 9
Signal definition TXD RXD GND Null

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3 Parameter Description of Machine
Tool
3.1 Enter parameter page
Steps to entering parameter page are as below.
Step 1 On Program Management page, click to enter Programming
Constant page, as shown in Figure 3-1. On this page, program constant can be
set.
Figure 3-1 Program Constant page
Step 2 Input the password “95656”, click to enter Parameter
Setting page, as shown in Figure 3-2.
Figure 3-2 Parameter Setting page

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Step 3 Select “1. System Parameter”, then click to enter
system Parameter Setting page, as shown in Figure 3-3.
SYS PARA 1/ 1PG
X-safe: 1.000
Y-safe: 1.000
Step delay: 3333
X-digits: 3
Y-digits: 3
Range：0~3
Figure 3-3 System Parameter Setting page
Description
You can directly enter System Parameter Setting Page by input password “94343”and
click on Program Constant page.
Step 4 As for setting methods of other parameters, refer to Step 3.
Description
X-axle parameter. You can set up X-axle parameter.
Y-axle parameter. You can set up Y-axle parameter.
Backup/recover. You can backup system by one key and recover the backup content.
3.2 Parameter specification
Parameter specification is shown in Table 3-1.
Table 3-1 Parameter specification
Parameter name Default
value
Parameter
range
Parameter description
Decimal places
of X axle
2 0~3 Decimal places indicated
by X axle parameter
Decimal places
of Y axle
2 0~3 Decimal places indicated
by Y axle parameter
Metric/inch 0 0 or 1 0：Metric；1;inch
Chinese/inch 0 0 or 1 0：Chinese；1：inch

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Parameter name Default
value
Parameter
range
Parameter description
Decompression
delay
0 0~99999ms Interval between valid
yield signal and unloading
output when system starts.
X axle teach 0 0~9999.999mm Input current X axle
position when teach
enable.
Y axle teach 0 0~9999.999mm Input current Y axle
position when teach
enable.
X safe distance 0 0~9999.999mm Keep low speed within
this range
Y safe distance 0 0~9999.999mm Keep low speed within
this range
Step change
delay
0 0~9999ms Interval between valid step
change signal and system
executing step change.
X axle enable 1 0 or 1 0:disable 1:enable
X encoder
direction
0 0 or 1 0:decreasing 1:increasing
X teach enable 0 0 or 1 0:disable 1:enable
X reference
position
20 0~9999.999mm Position displayed when X
axle reference point is
found.
X minimum 10 0～9999.999 Minimum position of X
axle;
X maximum 500 0～9999.999 Maximum position of X
axle;
X multiple
factor
40 1～99999999 X axle multiple factor, for
conversion between pulse
and millimeter.
X divide factor 1 1～99999999 X axle divide factor, for
conversion between pulse
and millimeter.
X stop distance 0 0~9999.999mm Advance stop range.
Motor stops and carries
out inertial motion when
enter this range.
X allowable
tolerance
0.05 0~99.999mm Position tolerance,
in-place signal is output
when reaching this range.

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Parameter name Default
value
Parameter
range
Parameter description
X over travel
enable
0 0 or 1 0:disable 1:enable
X over travel
distance
10 0~9999.999mm Over travel distance, valid
when positioning both
sides
X repeat enable 0 1~99999999 0:disable 1:enable
X repeat time 50 0~9999ms Interval of back gauge
reposition when repeat
position
X conversion
distance
50 0~9999.999mm Conversion distance
between high speed and
low speed. Motor lowers
speed when enter this
range.
X stop time 0 0~9999ms Back gauge reaches
advance stop range. Due
to inertia, back gauge will
not stop immediately after
motor stops. The time for
back gauge to stop.
X over travel
wait
0 0~9999ms Interval between back
gauge reach over travel
position and input motor
signal.
X drive mode 0 0 or 1 0:frequency converter 1:
common motor
Y axle enable 1 0 or 1 0:disable 1:enable
Y encoder
direction
0 0 or 1 0:decreasing
1:increasing
Y teach enable 0 0 or 1 0:disable 1:enable
Y reference
position
20 0~9999.999mm Position indicated when Y
axle reference point is
found.
Y minimum 10 0～9999.999 Y axle minimum position;
Y maximum 500 0～9999.999 Y axle maximum position;
Y multiple
factor
40 1～99999999 Y axle multiple factor, for
conversion between pulse
and millimeter.
Y divide factor 1 1～99999999 Y axle divide factor, for
conversion between pulse
and millimeter.