Panasonic GD Series User manual

Thank you very much for using Panasonic products. Please read this
Instruction Manual carefully and thoroughly for the correct and opti-
mum use of this product. Kindly keep this manual in a convenient
place for quick reference.
OUTLINE
1
●This product detects double feeds of metal sheets, lead frames, etc.
The sensitivity is easily set by teaching with actual samples.
●
●
●
Never use this product as a sensing device for personnel protection.
In case of using sensing devices for personnel protection, use products which meet laws and standards, such as
OSHA, ANSI or IEC etc., for personnel protection applicable in each region or country.
Make sure to use the sensor heads and controllers in the specified combinations. If they are used in any other com-
bination, the sensor heads may get damaged.
WARNING
FUNCTIONAL DESCRIPTION
2
POWER ALM. OUT-1 OUT-2
PANEL
EXT.
RS232C
NORM.
OFD.
RUN
SET
0-ADJ.
SET-2
SENS.
CH-SELECT
TIMER
SET-MODE SET-1
CH
①②③④⑤⑥⑦
⑮⑭⑬⑫⑪
⑧
⑨
⑩
⑦
⑧
・
・
Lights up when OUT-2 is OFF.
Blinks twice on completion of zero adjustment (0-ADJ.) or
SET-2 setting in SET mode.
Sensing level indicator
(Yellow ×1, Green ×6)
・
・
・
Seven LEDs show the sensing level.
LEDs light up one after the other during teaching.
All LEDs blink at the same time if the teaching fails.
・More the number, thicker or larger the object sheets are,
more are the LEDs which light up.
Description Function
・
Sets the two-sheet threshold level (larger number of sheets).
・ Sets the one-sheet threshold level (smaller number of sheets).
・Calibrates zero level under sheet non-existing condition.
Channel display⑨
⑩・The channel can be selected by the channel shift key when
CH-SELECT is set at PANEL.
・Switches between RUN mode and SET mode.
□RUN: Detection takes place.
□SET: Set-up is done.
・Switches timer mode.
□NORM. mode: Timer not used.
□OFD. mode: Delay timer (50ms approx.) used.
Channel shift key
⑪SET-2 key
⑫SET-1 key
⑬
Zero adjustment (0-ADJ.) key
⑭SET-MODE key
⑮TIMER key
・Shows the present channel (1 to 8).
・
・
Blinks during SET mode.
The decimal point informs whether the set level data has
been stored.
・
・
When an error occurs, the display indicates the error code.
Refer to '●Self-diagnosis (Alarm) function' in ' EX-
PLANATION OF FUNCTIONS'.
6
Decimal point
Lights up
Turns off
Stored
Not stored
Description Function
－ Panel cover①
Power indicator (Green)②
Sensing mode indicator
(Green, Yellow)
⑤
⑥
Channel select key
(CH-SELECT)
③
Self-diagnosis indicator
(Red)
・Lights up when the power is ON.
④・SET mode: Lights up under normal condition.
RUN mode: Lights up on error.
・
・
Lights up when OUT-1 is OFF.
Blinks twice on completion of zero adjustment (0-ADJ.) or
SET-1 setting in SET mode.
Comparative output-1
(OUT-1) indicator (Green)
・
・
Specifies whether channel selection is by panel operation,
by external channel select inputs, or through RS-232C com-
munication.
□PANEL: Selection is by channel select key.
□LOCK: Locks channel selection. In case of GD-C2, this is
also the setting for channel selection by external
device through RS-232C.
□EXT.: Selection is by external channel select inputs.
The table below gives the key and external input operation
for each channel selection method.
GD-C2:
RS-232C
○: Operable
Panel keysExternal inputs
Operation
RUN / SET selection
Mode PANEL LOCK
(RS-232C)
EXT.
○(Note) ○(Note) ○(Note)
Timer mode selection ○○○
SET-1 ○○○
SET-2 ○○○
0-ADJ. ○○○
RUN / SET ○○○
SET-1 ○○○
SET-2 ○○○
IN-0 ○
IN-1 ○
IN-2 ○
Channel shift ○
Note: The RUN / SET selection with the SET-MODE key on
the panel is effective only when the RUN / SET selec-
tion input is High (RUN mode).
・
・
Indicates the sensing mode.
Refer to '●Sensing Mode' in ' EXPLANATION OF
FUNCTIONS'.
・
・
Lights up green: Normal sensing mode
Lights up yellow: Precise sensing mode
6
Comparative output-2
(OUT-2) indicator (Red)
MJE-GD(03) No.0030-70V
INSTRUCTION MANUAL
Metal-sheet Double-feed Detector
GD Series

MOUNTING
3
٨
࡮
Placing of sensor heads
Make the sender and receiver face each other and align their sensing center line.
٨
࡮
Distance from nearby metals
As metals near the sensor head may affect the sensing performance, pay attention to the following points.
࡮The sensor head must be separated from nearby metal by a minimum distance as specified in the table below.
࡮Keep a distance from any magnet or a device generating magnetic field. It may degrade the detectability.
࡮The sensing performance may be affected if the sensor is completely embedded in a metal. Keep a minimum clearance between the sensor
head and the metal as specified in the table below.
٨Mounting of sensor heads
GD-10
࡮Use a set screw (M3 or less), and
the tightening torque should be
0.12N㨯m or less.
࡮The tightening torque should be
11.2N㨯m or less.
࡮
࡮
The tightening torque should be 0.5N㨯m or less.
To mount the sensor head with a nut, the thru-hole should be Ǿ3.4mm.
(The mounting board must be 2.3mm, or less, thick.)
٨
࡮
Interference prevention
When two or more sensor heads are mounted in parallel, keep a minimum separation distance as specified below to avoid interference.
٨Mounting of controller
Ԙ
ԙ

With the stopper pressed in the
direction of the arrow (it locks), fit
the front portion of the mounting
section of the amplifier on the
35mm width DIN rail.
Press and fit the rear portion of
the mounting section on the
35mm width DIN rail.
To remove, insert a flathead
screwdriver into the stopper and
pull out.
࡮Use two M4 pan head screws
10mm, or more, long. The tight-
ening torque should be 1.2N㨯m
or less.
࡮To mount the controller on a panel, use two M4 pan head screws
70mm, or more, long and the tightening torque should be 1.2N㨯m
or less. If your mounting panel is metallic, insert the attached insu-
lation plates at the terminals.
On panel
M4 (length 70mm or more)
pan head screws
(Please arrange separately.)
Insulation plate
Insulation plate
Nuts
Please arrange
separately.
96r0.2
8.5+0.5
0113+0.5
0
76r0.2
67.5+0.5
0
8.5 0.5
- 0
2-Ǿ4.5
*Mounting hole dimensions (Unit: mm)
D
Sender Receiver
Sender Receiver
C
Sender Receiver
Receiver Sender
In case the sender and another sensor's receiver are placed adjacently
On DIN rail
On board with screws
Note: The value in the brackets is for GD-20.
Dimension C (in case of iron)
220mm
630mm
Model No.
Setting distance (Note)
5mm 10mm 20 (35) mm 30 (70) mm
60mmGD-3 80mm
㧙㧙
160mmGD-10
370mmGD-20
In case the respective senders and receivers are placed adjacently
Note: The value in the brackets is for GD-20.
Dimension D (in case of iron)
250mm
700mm
Model No.
Setting distance (Note)
5mm 10mm 2035mm 3070mm
30mmGD-3 50mm
㧙㧙
200mmGD-10
450mmGD-20
Stopper
35mm width
DIN rail
Ԙ
ԙ
Flathead screwdriver
Stopper
(Please arrange separately.)
M4 (length 10mm or more)
pan head screws
(Please arrange separately.)
Nuts
GD-3
GD-20
Influence of nearby metal
Embedding in metal
If mounting using nut
and washers
(Accessory for GD-10)
M3 (length 12mm)
pan head screw
(Accessory for GD-10)
M30.5mm tapped
hole, 10mm or more
deep, or Ǿ3.4mm
thru-hole
Anti-slip rubber
washer
(Accessory for GD-10)
<Fixing at one point> <Fixing at two points> 4mm or more
2mm or more
Set screw
(M3 or less)
M8 mounting
hole, 6mm deep
M8 screw
(Please arrange separately.)
A
Nearby metal
GD-3
Nearby metal
A A
GD-10
Nearby metal
A
GD-20
Dimension A (in case of iron)
Model No.
Setting distance
5mm 10mm 30mm 70mm
15mmGD-3 20mm
㧙㧙
100mmGD-10
100mmGD-20
㧙
Dimension B (in case of iron)
Model No.
Setting distance
5mm 10mm 30mm 70mm
Ǿ15mmGD-3 Ǿ20mm
㧙㧙
Ǿ100mmGD-10
Ǿ300mmGD-20
㧙
B
Metal
5mm
GD-3
B
Metal
GD-10
B
Metal
GD-20
16
If mounting using nut
and washers
(Accessory for GD-10)
M3 (length 12mm)
pan head screw
(Accessory for GD-10)
Mounting bracket
(Accessory for GD-10)
M30.5mm tapped
hole, 10mm or more
deep, or Ǿ3.4mm
thru-hole
Ǿ2.5mm
hole
3mm or
more deep

CONNECTION
4
٨Wiring diagram
Note: The terminal ԙ, 0V of power supply, is isolated from 0V of input /
output circuitry for noise immunity. However, if you except to share
the power supply with the output loads, connect terminals ԙand ԝ,
terminals ԙand ԡ, or terminals ԙand ԫto make 0V common.
*1
or
Low: 0 to 1V, High: 4.5 to 30V, or open
Non-voltage contact or NPN open-collector transistor
Symbols ... D
ZD
Tr
: Reverse supply polarity protection diode
: Surge absorption zener diode
: NPN output transistor
Pin arrangement
٨I/O circuit diagram ٨External channel select truth table
٨RS-232C wiring diagram (GD-C2 only)
Note: 0V of power supply is isolated from 0V of input / output circuitry. To share the
power supply with a load, both the 0V terminals should be short-circuited.
Channel No.
Input IN-0 IN-1 IN-2
1LHH
2HLH
3LLH
4HHL
5LHL
6HLL
7LLL
8HHH
L: Low (0 to 1V), H: High (4.5 to 30V, or open)
TXD
RXD
RS
CS
SG
: Transmit date, command
: Receive date, command
: Request-to-send
: Clear-to-send
: Signal ground
3
4
52
7
8
9 6
1
9-pin connector (female)
TXD RXD
Not connected
RS
Not connected
Not connected
CS
Not connected
SG
POWER ALM. OUT-1 OUT-2
PANEL
EXT.
RS-232C
NORM.
OFD.
RUN
SET
0-ADJ.
SET-2
SENS.
CH-SELECT
TIMER
SET-MODE
SET-1
CH
11
12
13
14
15
16
17
18
19
20
1
2
3
4
5
6
7
8
9
10
+
-
Load
Load Load
+V
0V (Note)
OUT-1
OUT-2
ALM. (Self-diagnosis output)
0V (Note)
IN-0
IN-1
IN-2
0V (Note)
30V DC or less
12 to 24V DCr10%
*1 *1 *1
+
-
External channel selected inputs
+
-
Load
White
Shield
White
Black
Shield
RUN / SET
SET-1
SET-2
ANS. OUT (Answer-back output)
30V DC
or less
Sender Receiver
*1 *1 *1
0V (Note)
Color code
External setting input
+V
0V (Note)
100mA max.
12 to 24V DC
r10%
*1
Load +
-
30V DC
or less
0V (Note)
Input
Output
OUT-1, OUT-2
ALM., Answer-back
IN-0, IN-1, IN-2㨮
RUN / SET, SET-1, SET-2
+
-
Users' circuitInternal circuit
D
Tr
ZD
Sensor circuit
TXD (3)
RXD (2)
RS (7)
CS (8)
SG (5)
TXD
RXD
CS
RS
SG
Connector pin No.
Controller
External device
SENSITIVITY SETTING
5
Teaching through operation panel
٨The teaching can also be performed by external input signals.
Notes: 1)
2)
3)
4)
The order of the above procedure at ԝ, Ԟand ԟis arbitrary.
The 'SET-1 key' searches the one-sheet level, and the 'SET-2 key' the
two-sheet level. After having selected the SET mode, only by pressing
either one once, the one-sheet or two-sheet levels are not undated. Af-
ter having pressed the 'SET-1' and 'SET-2' keys once in SET mode, as
long as it is in SET mode, the one-sheet or the two-sheet level is updat-
ed by pressing either SET keys. The moment the RUN mode is set, the
data is confirmed. (Setting complete)
The zero-sheet level is common for all eight channels. Once the zero-
sheet level is set for one channel after the sensor heads are installed,
there is no need to set it again for the other channels.
However, set the one-sheet level and the two-sheet level on each
channel, once again, when 0-ADJ. key is pressed since this resets
the zero-sheet level as per the prevailing conditions.
The set data is not erased even if turns the power off.
If the setting of the sender and receiver is changed after teaching, de-
tection may become unstable. In this case, perform the teaching once
again.
Teaching by external input
<Time chart>
High
Low
High
Low
High
Low
High
Low
High
Low
RUN / SET
selected input
Answer-back
output
(ANS. OUT)
Answer-back
output
(ANS. OUT)
SET-1 input
50ms or more
50ms or more
50ms or more
50ms or more
Teaching not successful
Teaching successful
RUN SET
SET-2 input
Teaching successful
1ms or less
CPU processing
time (a few seconds)
1ms or less CPU processing
time (a few seconds)
Turn the power on.
࡮Check that the power indicator lights up.
Procedure Operation
Ԙ
ԙOpen the panel cover.
Preparation
Ԛ
ԛ
Select one of eight channels by pressing the 'channel shift key'.
To modify a previously stored date, choose the particular channel.
Otherwise, choose any channel from 1 to 8.
࡮If the selected channel does not have data stored in it, the self-diag-
nosis indicator lights up.
Select 'PANEL' by pressing 'CH-SELECT key'.
࡮This enables the keys on the panel.
CH
PANEL
EXT.
LOCK
Channel selection
Ԡ
Return to the 'RUN mode' from SET mode by pressing the 'SET-MODE key'.
࡮
࡮
࡮
The self-diagnosis indicator turns off. [If it does not turn off, an error may be in-
herent. Refer to ' EXPLANATION OF FUNCTIONS', '٨Self-diagnosis (Alarm)
function'.]
The indicated channel number changes from blinking into continuous lighting.
During the RUN mode, the '0-ADJ. key', 'SET-1 key', and 'SET-2 key' are ineffective.
6
*
If the teaching fails, all the sensing indicators blink at the
same time. In this case, repeat the sensitivity setting af-
ter changing the setting of the sender and the receiver.
Blink
Ԝ
ԝ
(Note 1)
(Note 2)
Press the '0-ADJ. key' while no object exists between
the sensor heads.
࡮After the sensing level indicators light up one after the
other for about four cycles, both OUT-1 and OUT-2
blink twice at the same time.
Ԟ
(Note 1)
Place one sheet between the sensor heads, and then
press the 'SET-1 key'.
࡮
࡮
The sensing level indicators blink one after the other
for about four cycles. After that, OUT-1 blinks twice.
Hold the object steadily between the sensor heads while
the sensing level indicators are lighting up in rotation.
ԟ
(Note 1)
Place two sheets between the sensor heads, and then
press the 'SET-2 key'.
࡮
࡮
࡮
The sensing level indicators light up one after the oth-
er for about four cycles. After that, OUT-2 blinks twice.
Hold the object ssteadily between the sensor heads while
the sensing level indicators are lighting up in rotation.
Enter into the SET mode from RUN mode by pressing the 'SET-
MODE key'. (Note 5)
࡮
࡮
The self-diagnosis indicator lights up.
The designated channel number blinks.
No sheet
One sheet
Two sheets
RUN
SET
Level setting
Notes: 5) In case the set indicator blinking, double-feed teaching can-
not be conducted.
The error release method is pressing down SET-1 and SET-
2 together more than 5 seconds or making SET-1 or SET-2
input wire Lo side more than 5 seconds.
Conduct the teaching after the set indicator (red) is changed
to blinking.
RUN
SET
RUN
SET

٨
࡮
Sensing mode
The GD series has two sensing modes, one is the normal sensing mode and the other is the precise sensing mode. They are automatically se-
lected by the characteristics of the object.
٨
࡮
Two-sheet threshold level shift function
In normal teaching, the two-sheet threshold level is automatically
set at the center or the one-sheet level and the two-sheet level. The
two-sheet threshold level shift function enables you to shift the two-
sheet threshold level towards, either, the one-sheet level, or, the
two-sheet level, in four steps. Consequently, if either one of the de-
tection levels is stable, then by shifting the two-sheet threshold lev-
el towards that side, stable detection is possible even if the other
detection level is unstable. Further, since by shifting the two-sheet
threshold level, the difference between it and, either, the one-sheet
level, or, the two-sheet level can be made small, fine detection is al-
so possible.
࡮The sensing mode indicator lights up green during the normal sensing mode, but lights up yellow during the precise sensing mode.
The GD series goes into this mode when the num-
ber of objects (e.g., large metal sheets) is distin-
guished with relative ease.
EXPLANATION OF FUNCTIONS
6
Normal sensing
mode
The GD series goes into this mode when the number
of objects (e.g. lead frames) is difficult to distinguish.
In this mode, the sensitivity difference is so minute
between two sensing levels that vibration and ambi-
ent temperature changes must be carefully man
aged.
Precise sensing
mode
Iron etc.
Lead frame etc.
Zero-sheet level
One-sheet
threshold level
One-sheet level
Two-sheet
threshold level
Two-sheet level
Normal teaching
OUT-1 OFF
OUT-1 ON
OUT-2 OFF OUT-2 ON
One-sheet level 1 (10%)
(0%)
(100%)
2 (20%)
3 (30%)
4 (40%)
5 (50%)
6 (60%)
7 (70%)
8 (80%)
9 (90%)
Two-sheet
threshold level
Two-sheet threshold
level indication
Two-sheet level
In normal teaching, the two-sheet
threshold level is set at 5 (50%)
Two-sheet threshold level shift function
Setting procedure
Perform normal teaching.
Select 'RUN mode' by 'SET-MODE key'.
Step Operation
Ԙ
ԙ
Ԛ
RUN
SET
ԛ
Shift the two-sheet threshold level by pressing either 'SET-1 key' or 'SET-2 key'.
࡮
࡮
࡮
Each time 'SET-1 key' is pressed, the two-sheet threshold level shifts as '5' ψ'4'
ψ'3' ψ'2' ψ'1', i.e., towards the one-sheet level.
[It becomes easier for OUT-2 (two-sheet output) to go OFF.]
Each time 'SET-2 key' is pressed, the two-sheet threshold level shifts as '5' ψ'6'
ψ'7' ψ'8' ψ'9', i.e., towards the two-sheet level.
[It becomes more difficult for OUT-2 (two-sheet output) to go OFF.]
Ԝ
0-ADJ.
0-ADJ.
SET-1
SET-2
After having shifted the two-sheet threshold level, press '0-ADJ. key' till ' ' appears on the
channel display.
(The shifted two-sheet threshold level is stored and the sensor returns to the RUN mode.)
࡮The self-diagnosis indicator turns off.
Press '0-ADJ. key' for more than 3 sec.
࡮
࡮
࡮
' ' is displayed on the channel display are the sensor en-
ters the two-sheet threshold level shift mode.
When '0-ADJ. key' is released, the ' ' display changes to
a blinking display of ' ', which is the two-sheet threshold
level before the shift.
The self-diagnosis indicator lights up in the two-sheet
threshold level shift mode.
࡮
࡮
Make sure to press '0-ADJ. key' after shifting the two-sheet threshold
level. If 'CH-SELECT key', 'SET-MODE key' or 'CH key' is pressed, al-
though the sensor returns to the RUN mode, the shifted two-sheet
threshold level is not stored.
With respect to a single teaching data, make sure to shift the two-sheet
threshold level only once. In case you wish to shift the level once again,
do so after performing the normal teaching again.
Note: Once the timer becomes effective, it acts upon both OUT-1 and
OUT-2 of all channels.
Note: In the SET mode, the self-diagnosis indicator continuously lights up
and the self-diagnosis output stays off.
٨
࡮
Timer function
The GD series is incorporated with a fixed delay timer of
50ms approx. Since the signal output is extended by a fixed
time interval, this is useful when the connected device has a
slow response time or when small objects are detected and
the output signal width is small.
٨
࡮
Self-diagnosis (Alarm) function
The GD series diagnoses itself. The result lights up the self-
diagnosis indicator, generates the self-diagnosis output, and
shows the error code on the channel display as per the fol-
lowing table
<Time chart>
Timer period: T = 50ms approx.
NORM.
mode
ON
OFF
ON
OFF
TT T
OFD.
mode
Sensing condition
One-sheet or more
(OUT-2; Two-sheets or more)
Under one-sheet
(OUT-2: Under two-sheets)
Operation
OUT-1, OUT-2
During RS-232C commu- nication (GD-C2 only)
Description
Internal circuit
failure
Countermeasures
Please contact our office.
Channel
display
Sensing lev-
el indicators
Self-diagnosis
indicator (Note)
Self-diagnosis
output (Note)
Blink Lights up OFF
Disconnected
sender cable
Check connection of send-
er cable.
Blink Lights up OFF
Operation key
pressed for 30 sec.
or more
Check keys on panel.
Blink Lights up OFF
Present
channel
number
Too little contrast
between one and
two sheet levels
Change the setting.
㧙
Lights up OFF
Present
channel
number
Selection of chan-
nel without stored
data
Select the channel in
which data is stored.
㧙
Lights up
for 1 sec.
Syntax error Blink
10 times Lights up ON
Memory overflow Check if the terminal code
is correctly sent.
Blink Lights up ON
On power -ON
During operation
OFF for
1 sec.
self-re-
storation
Check RS-232C protocol
baud rate, parity, stop
bits, data bits.

٨
࡮
ALL-LOCK function
All keys on the operation panel are locked when the channel shift key is pressed for 3 sec. or more (unless CH-SELECT is set on 'PANEL').
To release the lock, press the channel shift key for 3 sec., or more, again.
٨
࡮
Response time
The controllers GD-C1 and GD-C2 automatically select the most suitable signal processing method, according to the material and thickness of
the sensing object. Depending on the selected signal processing method, the response time is also automatically determined as either '5ms or
less', or '30ms or less'.
Further, when controller GD-C3 is used, the response time is 5ms or less.
The response time of the controllers, GD-C1 and GD-C2, can be confirmed by the following procedure.
Ԙ
ԙ
Press '0-ADJ. key' in RUN mode'.
The channel display shows an alphanumeric character that represents the re-
sponse time in the right.
or 5ms or less 30ms or less
Other than
the above
٨GD-C2 can feed in the set level data into a PC or PLC memory using RS-232C serial communication and retrieve it whenever required.
In this case, the taught data should be stored in the prescribed channel.
Transmission specifications
࡮Baud rate: Selectable from 300, 600, 1,200, 2,400, 4,800, 9,600, 19,200, or 31,250 bits/sec.
࡮Format: Data bits ...................
Parity check ..............
Stop bits ....................
Terminal code ...........
7 bits or 8 bits
None or Enable
Even or Odd
1 bit or 2 bits
CR or ETX
RS-232C DATA TRANSMISSION (GD-C2 only)
7
Command
࡮
࡮
If the sent command is ineffective, GD-C2 returns 'Not Available'.
All characters including send and response statements are based on ASCII code.
࡮All commands used to communicate with GD-C2 are classified into three groups: write command, read command, and others (ASCII coded data
communication).
Notes: 1)
2)
3)
The GD series automatically selects the most effective sensing process
according to the material and thickness of the object.
The process number ranges from '00 to 47' in decimal number system.
Both the one-sheet level data and the two-sheet level data are repre-
sented by decimal numbers from '0 to 4,095',
The data information, information on the presence of data, the sensing
mode, etc., is represented by decimal numbers from '00 to 63'.
SCH
SRC 1 to 8
SAC
UsageStatement
Assign the channel and write data into it.
The command format is the same as for SCH.
Write the date into the channel presently designated.
SCH˴˴ٌٌٌٌ˴٤٤٤٤˴غغ + CR (ETX)
Space or
comma (, )
Attribute (Note 3)
One-sheet level data (Note 2)
Two-sheet level data (Note 2)
Process No. (Note 1)
Write the data into all channels.
SAC˴˴ٌٌٌٌ˴٤٤٤٤˴غغ˴˴ٌٌٌٌ˴٤٤٤٤˴غغ
˴˴˴ٌٌٌٌ˴٤٤٤٤˴غغ + CR (ETX)
Channel 1 Channel 2
Channel 8
ԘWrite command
Syntax: Statement + Numerical data + CR (ETX)
࡮After the write command is sent, Statement + CR(ETX) is returned
by GD-C2 to confirm the communication.
<Type of commands>
Note: Both the one-sheet level data and the two-sheet level data are represented
by decimal numbers from '0 to 4,095',
Note: Make sure to turn the power off when set the parameter DIP switch. When turn the power on, the set contents are reflected.
After setting, be sure to mount the protective cover.
RCH
RRC 1 to 8
RAC
RAD
OUT 0
OUT 1
Read the data of the presently designated channel.
Send: RCH + CR (ETX)
Response: RCH˴˴ٌٌٌٌ˴٤٤٤٤˴غغ CR (ETX)
Read data of all channels.
Send: RAC + CR (ETX)
Response: RAC ˴˴ٌٌٌٌ˴٤٤٤٤˴غغ˴˴ٌٌٌٌ
٤٤٤٤˴غغ˴˴˴˴ٌٌٌٌ˴٤٤٤٤˴غغ CR (ETX)
Channel 1 Channel 2
Channel 8
Read only the sensing level data of the present channel.
Send: RAD + CR (ETX)
Response: RAD ˴ڏڏڏڏ + CR (ETX)
Sensing level data (Note)
Read the present sensing condition.
Send: OUT 0 + CR (ETX)
Response: OUT 0 ˴ٖ + CR (ETX)
(0: Zero-sheet sensing, 1: One-sheet sensing, 2: Two-sheet sensing)
Sensing condition
Read the present sensing level (the number of LEDs which light up).
Send: OUT 1 + CR (ETX)
Response: OUT 1 ˴٠ + CR (ETX)
(0 to 7)
Sensing level
UsageStatement
Assign the channel and read its data.
Send: RRC 1 to 8 + CR (ETX)
Response: RRC 1 to 8˴˴ٌٌٌٌ˴٤٤٤٤˴غغ CR (ETX)
ԙRead command
Syntax: Statement + CR (ETX)
<Type of commands>
Parameter setting
࡮Set the paraments with the DIP switches on GD-C2.
Prameter DIP switch
ON1 3456782
Terminal code
Stop bits
Parity Even / Odd
Parity None / Enable
Data bits
Baud rate
1
300 600
1,200 2,400 4,800 9,600 19,200 31,250
ON OFF ON OFF ON OFF ON OFF
2 ON ON OFF OFF ON ON OFF OFF
3 ON ON ON ON OFF OFF OFF OFF
Switch
No. Parameter
Baud rate
1
2
3
ON OFF
Data bits4 7 bits 8 bits
Parity check
5 Enable None
6 Even Odd
Stop bits7 1 bit 2 bits
Terminal code8 CR ETX
Switch No. Bits/sec.

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٨
٨
٨
٨
٨
Make sure to check the ability of the sensor to detect the number of sheets
of your actual objects before use. If real objects differ from teaching sam-
ples in size or in characteristics, or the detecting condition deviates, an er-
ror may occur. Please note that magnetic metals or metals with low mag-
netic permeability such as steel especially have a strong tendency.
In situations when magnets are in close proximity such as during electromag-
net conveyance, this causes malfunctions due to electromagnetic disorder.
When conducting minute detections, favorable sensing conditions
are obtained only after having elapsed 60 minutes after the initial in-
troduction of the power supply.
Make sure that the power supply is off while wiring.
Take care that wrong wiring will damage the sensor.
Verify that the supply voltage variation is within the rating.
٨
٨
٨
٨
٨
٨
If power is supplied from a commercial switching regulator, ensure that the frame
ground (F.G.) terminal of the power supply is connected to an actual ground.
In case noise generating equipment (switching regulator, inverter
motor, etc.) is used in the vicinity of this product, connect the frame
ground (F.G.) terminal of the equipment to an actual ground.
Do not run the wires together with high-voltage lines or power lines or put
them in the same raceway. This can cause malfunction due to induction.
Do not operate the sensor for a few seconds immediately after supply-
ing power because of transient conditions including self-diagnosis time.
The sensor head cable can be extended up to 20m max. by using an
equivalent shielded cable. However, when using the sensor head in
places having excessive noise, make the cable as short as possible.
This sensor is suitable for indoor use only.
CAUTIONS
8
࡮After the above command is sent, Statement + CR (ETX) is re-
turned by GD-C2 to confirm the communication.
$ Enter into RS-232C communication from other accesses.
RNM Enter into panel access.
EXT. Enter into EXT. access.
CH 1 to 8 Change channel.
LOCK Disable panel and EXT. accesses.
UNLOCK Enable panel and EXT. accesses.
PLOCK Disable the operation panel.
TIM 0 Enter into 'NORM. (non-timer)' timer mode.
TIM 1 Enter into 'OFD. (timer usage)' timer mode.
SMD 0 Enter into 'SET mode'.
SMD 1 Enter into 'RUN mode'.
ADJ 0
Execute zero adjust command. (Zero-sheet level teaching)
࡮After the command execution, the following response is given depending on
the teaching condition.
On successful teaching: OK + CR (ETX)
On unsuccessful teaching: NG + CR (ETX)
UsageStatement
Execute SET-1 command. (One-sheet level teaching)
࡮After the command execution, the following response is given depending on
the teaching condition.
On successful teaching: OK + CR (ETX)
On unsuccessful teaching: NG + CR (ETX)
Execute SET-2 command. (Two-sheet level teaching)
࡮After the command execution, the following response is given depending on
the teaching condition.
On successful teaching: OK + CR (ETX)
On unsuccessful teaching: NG + CR (ETX)
SET 1
SET 2
UsageStatement
ԚOther commands
Syntax: Statement + CR (ETX)
<Type of commands>
SPECIFICATIONS
9
٨Sensor heads
Cable
Sender: 0.5mm
2
single core shielded cable, 3m long
Receiver: 0.3mm
2
2-core shielded cable, 3m long
Sender: 0.3mm2single core shielded cable, 3m long
Receiver: 0.1mm22-core shielded cable, 3m long
Type
Model No.
Setting distance
Material Applicable controllers
Small object detection
GD-3
High precision
GD-10
Long sensing range
GD-20
Applicable controllers GD-C3 (Note 1) GD-C1, GD-C2, GD-C3 GD-C1, GD-C2
Detectable sheet thickness (Note 2) Standard sensing object size: 2020mm Standard sensing object size: 8080mm
Ambient temperature -10 to +60, Storage: -25 to +70
Ambient humidity 45 to 85% RH, Storage: 35 to 95% RH
Standard sensing object size: 200200mm
Weight 90g approx. 80g approx. 440g approx.
Accessory
㧙 Sensor head mounting bracket: 1 set for sender and receiver 㧙
Material
Enclosure: Stainless steel (SUS 303), Sensing face: ABS
Polyalylate Sensing face: Polyacetal, Main body: Stainless steel
Protection IP67 (IEC) IP67 (IEC), IP67g (JEM)
Sensing range (between sensor heads) 10mm or less 30mm or less 70mm or less
5mm 10mm 20mm 30mm 35mm 70mm
GD-C1 / GD-C2
Iron
(SPCC)
㧙㧙 0.07 to 1mm 0.07 to 0.5mm 0.07 to 10mm 0.07 to 6mm
GD-C3 0.01 to 0.1mm 0.03 to 0.1mm 0.01 to 0.3mm 0.01 to 0.1mm
㧙㧙
GD-C1 / GD-C2
Stainless steel
(SUS 304)
㧙㧙 0.1 to 6mm 0.1 to 2mm 0.1 to 10mm 0.1 to 6mm
GD-C3 0.3 to 1mm 0.3 to 1mm 0.05 to 2mm 0.05 to 1mm
㧙㧙
Aluminum GD-C1 / GD-C2
㧙㧙 0.03 to 6mm 0.03 to 2mm 0.03 to 10mm 0.03 to 6mm
GD-C3 0.015 to 1mm 0.015 to 1mm 0.015 to 1mm 0.015 to 1mm
㧙㧙
Copper GD-C1 / GD-C2
㧙㧙 0.03 to 6mm 0.03 to 2mm 0.03 to 10mm 0.03 to 6mm
GD-C3 0.018 to 1mm 0.018 to 0.3mm 0.018 to 1mm 0.018 to 1mm
㧙㧙
Brass GD-C1 / GD-C2
㧙㧙 0.03 to 6mm 0.03 to 2mm 0.03 to 10mm 0.03 to 6mm
GD-C3 0.03 to 1mm 0.03 to 0.5mm 0.01 to 1mm 0.01 to 1mm
㧙㧙
Item
Notes: 1)
2)
Since it is possible that GD-3 may get damaged if controllers GD-C1 or GD-C2 are connected to it, make sure to use controller GD-C3 along with GD-3.
The above detectable sheet thicknesses are typical data at the given sensing distance. The allowable thickness will differ from the range described in the above ta-
ble at other setting distances. Further, double feeds of aluminum foils can also be detected at distances shorter than the above. Please contact our office for details.
Note: When conducting minute ditections, the detection may be affected if the ambient temperature greatly changes from the teaching. In this case, perform the teaching
again or use the product under the equable temperature.
٨Controllers
NPN open-collector transistor
࡮Maximum sink current: 100mA
࡮Applied voltage: 30V DC or less (between output and 0V)
࡮Residual voltage: 1V or less (at 100mA sink current)
0.4V or less (at 16mA sink current)
Type
Model No.
Standard
GD-C1
With RS-232C communication function
GD-C2
Small object detection
GD-C3
5ms or less
Supply voltage 12 to 24V DCr10% Ripple P-P 10% or less
Current consumption 12V DC: 700mA or less, 24V DC: 400mA or less
Response time Automatically selected either 5ms or less, or 30ms or less, depending on the object
Output operation
Short-circuit protection Incorporated
Ambient temperature -10 to +50(No dew condensation or icing allowed), Storage: -25 to +70(Note)
Ambient humidity 45 to 85% RH, Storage: 35 to 90% RH
Weight 440g approx.
Accessory Insulation plate: 2 pcs.
Material Heat-resistant ABS
Item
Output
(OUT-1, OUT-2, ALM., Answer-back)
OUT-1: OFF above the one-sheet threshold level
OUT-2: OFF above the two-sheet threshold level
ALM.: OFF when an error occurs
Answer-back: Refer to the time chart of the ' SENSITIVITY SETTING'.
5
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