Mitsubishi Electric MELDAS C6 User manual

CNC
C6/C64/C64T
PLC INTERFACE MANUAL
BNP-B2261E(ENG)

MELDAS is a registered trademark of Mitsubishi Electric Corporation.
Other company and product names that appear in this manual are trademarks or
registered trademarks of the respective company.

Introduction
This manual describes the various signal interfaces and functions required when
creating MELDAS C6/C64/C64T sequence programs (built-in PLC).
Read this manual thoroughly before programming.
Thoroughly study the "Safety Precautions" on the following page to ensure safe use of
the MELDAS C6/C64/C64T.
Details described in this manual
CAUTION
For items described in "Restrictions" or "Usable State", the instruction manual
issued by the machine manufacturer takes precedence over this manual.
Items not described in this manual must be interpreted as "not possible".
This manual is written on the assumption that all option functions are added.
Refer to the specifications issued by the machine manufacturer before starting
use.
Some screens and functions may differ or may not be usable depending on the
NC version.
General precautions
The following documents are available as documents related to the contents of
this manual. Refer to these as required.
(1) MELDAS C6/C64 PLC Programming Manual
(Ladder section with MELSEC tool)..... BNP-B2309
(2) MELDAS C6/C64 Network Manual................................... BNP-B2373

Precautions for Safety
Always read the specifications issued by the machine manufacturer, this manual,
related manuals and attached documents before installation, operation, programming,
maintenance or inspection to ensure correct use. Understand this numerical controller,
safety items and cautions before using the unit.
This manual ranks the safety precautions into "DANGER", "WARNING" and "CAUTION".
When there is a great risk that the user could be subject to
fatalities or serious injuries if handling is mistaken.
When the user could be subject to fatalities or serious
injuries if handling is mistaken.
When the user could be subject to injuries or when physical
damage could occur if handling is mistaken.
Note that even items ranked as "
CAUTION" may lead to major results depending
on the situation. In any case, important information that must always be observed is
described.
DANGER
There are no "Danger" items in this manual.
WARNING
1. Items related to prevention of electric shocks
Do not operate the switches with wet hands, as this may lead to electric shocks.
Do not damage, apply excessive stress, place heavy things on or sandwich the
cables, as this may lead to electric shocks.
CAUTION
1. Items related to product and manual
For the items described in the "Restrictions" and "Usable State", the instruction
manual issued by the machine manufacturer takes a precedence over this
instruction manual.
Items not described in this manual must be interpreted as "not possible".
This instruction manual has been written on the assumption that all options are
provided.
Check the specifications issued by the machine manufacturer before starting use.
Some screens and functions may differ or may not be usable depending on the
NC system version.
2. Items related to connection
When using an inductive load such as relays, always contact a diode in parallel to
the load as a noise measure.
When using a capacitive load such as a lamp, always connect a protective
resistor serially to the load to suppress rush currents.
DANGER
WARNING
CAUTION

CAUTION
3. Items related to design
Always turn the spindle phase synchronization complete signal ON before
chucking both ends of the workpiece to the basic spindle and synchronous
spindle. If the spindle phase synchronization signal is turned ON when both ends
of the workpiece are chucked to the basic spindle and synchronous spindle, the
chuck or workpiece could be damaged by the torsion that occurs during phase
alignment.
If the temperature rise detection function is invalidated with the parameters, the
control could be disabled when the temperature is excessive. This could result in
machine damage or personal injuries due to runaway axis, and could damage the
device. Enable the detection function for normal use.

i
CONTENTS
1. OUTLINE ......................................................................................................... 1-1
2. SYSTEM CONFIGURATION .......................................................................... 2-1
2.1 Relation of RIO Unit and Devices .......................................................... 2-2
2.1.1 DIO Specification Setting Switch ............................................... 2-3
2.1.2 Rotary Switch for Channel No. Setting ...................................... 2-4
2.1.3 Relation of Connector Pins and Devices ................................... 2-5
2.2 Outline of Digital Signal Input Circuit ..................................................... 2-7
2.3 Outline of Digital Signal Output Circuit .................................................. 2-9
2.4 Outline of Analog Signal Output Circuit ................................................. 2-10
2.5 Outline of Analog Signal Input Circuit...................................................... 2-10
2.6 Fixed Signals ......................................................................................... 2-11
2.6.1 Ignoring Fixed Signals ............................................................... 2-11
2.6.2 Changing the Addresses of Fixed Signals ................................. 2-12
2.7 Flow of Signals ...................................................................................... 2-13
2.8 List of Devices Used .............................................................................. 2-14
2.9 File Register General Map ..................................................................... 2-15
3. INPUT/OUTPUT SIGNALS WITH MACHINE ................................................. 3-1
3.1 How to Read Input/Output Signal Table ................................................ 3-1
3.2 Classification of Machine Input/Output Signals ..................................... 3-2
3.3 Allocation of Machine Input/Output Signals ........................................... 3-2
4. TABLE OF INPUT/OUTPUT SIGNALS WITH CONTROLLER ...................... 4-1
4.1 How to Read Input/Output Signal Table ................................................ 4-1
4.2 Classification of Input/Output Signals with Controller ............................ 4-2
5. OTHER DEVICES ........................................................................................... 5-1
5.1 Devices .................................................................................................. 5-1
6. EXPLANATION OF INTERFACE SIGNALS .................................................. 6-1-1
6.1 PLC Input Signals (Bit Type: X***) ......................................................... 6-1-2
6.2 PLC Input Signals (Data Type: R***) ..................................................... 6-2-1
6.3 PLC Output Signals (Bit Type: Y***) ...................................................... 6-3-1
6.4 PLC Output Signals (Data Type: R***) .................................................. 6-4-1
6.5 Explanation of Special Relay/Register Signals (SM**, SD**) ................. 6-5-1
6.6 Signals Related to Communication ......................................................... 6-6-1
7. SPINDLE CONTROL ...................................................................................... 7-1
7.1 Outline of Functions ............................................................................... 7-1
7.1.1 Related Parameters .................................................................. 7-1
7.1.2 Connection Method ................................................................... 7-1
7.1.3 Flow of Spindle (S) Data............................................................. 7-2

1. OUTLINE
1-1
1. OUTLINE
This manual is prepared to assist you to understand the various control signals necessary for
creating the built-in sequence for the MELDAS C6/C64/C64T.
The manual is composed as shown below. Refer to related sections as necessary to gain the
maximum benefit from the manual.
(Caution)
Please note that the specifications referred to in the text represents the maximum
specifications which include also those under development.
Spindle
control
Explanation of
interface
signals
Device
Input : X, R
Output: Y, R
Others:
SM
,
SD
,
B
,
W
Explanation of
devices
Blank tables
for user
Table for input/
output signals
with controlle
r
Table for input/
output signals
with machine
System
configuration
PLC Interface
Manual
(cover)

2. SYSTEM CONFIGURATION
2-1
2. SYSTEM CONFIGURATION
DC24VINSERVO1SERVO2
ENCHANDLE
SIOTERMINAL
ICCARD
SKIP
DC24VINSERVO1SERVO2
ENCHANDLE
SIOTERMINAL
ICCARD
SKIP
(Note) Refer to the following document for details on the PLC development with the MELSEC PLC
development tool.
MELDAS C6/C64 PLC Programming Manual
(Ladder section with MELSEC tool) .................... BNP-B2309
Remote I/O unit
DX1**
ROM built in
main unit
C6/C64
Control unit
Max. 8 units
Machine control signals
Sensor
Max. 4 channels
(X418 to X41B)
Remote I/O unit
DX1**
Machine control signals
Max. 8 units
Max. input: 256 points
(X000 to X0FF)
Max. output: 256 points
(Y000 to Y0FF)
Manual pulse
generator
MELSEC PLC
development tool
RS-232C
or
RS-422
Built-in DI : 16 points(X400 to X40F)
Built-in DO : 1 point (Y400)
Expansion DI: 32 points
Expansion DO: 32 points
Analog output: 1 point
(Note) The expansion DIO unit is an
o
p
tion.
RIO-M
RIO-M/S
Extension DIO card
Max. 2 cards
Max. input: 256 points
(X100 to X1FF)
Max. output: 256 points
(Y100 to Y1FF)
Remote I/O unit
DX1**
Personal computer Display/
Commu-
nication Communication
terminal
Operation
panel, etc.
Other C6/C64
control unit
Personal computer
…………
…………
Ethernet

2. SYSTEM CONFIGURATION
2.1 Relation of RIO Unit and Devices
2-2
2.1 Relation of RIO Unit and Devices
The remote I/O units (hereafter RIO unit) connected to the RIO-M or RIO-M/S have different
specifications respectively as shown below. Each unit has a rotary switch for setting the unit No.,
and for establishing a relation with the device No. (X, Y).
DS
FCU
A
-DX10
Front view
FCU
A
-DX11
/
FCU
A
-DX12FCU
A
-DX13FCU
A
-DX14
5
6
7
(Front)
Bottom
view
5
6
7
5
6
7
5
6
7
11
3
1
2
3
4
1
2
3
4
8
3
9
1
2
3
4
10
3
1
2
3
4
1 DI-L (machine input signal connector)
2 DS (baud rate changeover switch)
3 CS (station No. changeover switch)
4 DO-L (machine output signal connector)
5 RIO1 (serial connection connector #1)
6 RIO2 (serial connection connector #2)
7 DCIN (24VDC(+) power input connector)
8 DI-R (machine input signal connector)
9 DO-R (machine output signal connector)
10 HANDLE (manual pulse generator signal input connector)
11 AIO (analog signal input/output connector)
CS
For changeover of baud rate.
Normally set to left side.
Not used
Selection of station No.
Enlarged drawing of DS and CS
1
4
2567
A
D9
B
FE
0
C
8
3
Front view Front view Front view
(Front) (Front) (Front)
Bottom
view Bottom view Bottom view
(Back) (Back) (Back) (Back)

2. SYSTEM CONFIGURATION
2.1 Relation of RIO Unit and Devices
2-3
No. of remote I/O unit input/output points
Unit model Compatible machine control signal Left Right Total
DX10*
(FCUA-DX10*) Digital input signal (DI) (Photocoupler insulation) Digital output signal(DO) (Non-insulated) 32 points 32 points — 32 points 32 points
DX11*
(FCUA-DX11*) Digital input signal (DI) (Photocoupler insulation) Digital output signal(DO) (Non-insulated) 32 points 32 points 32 points 16 points 64 points 48 points
DX12*
(FCUA-DX12*) Digital input signal (DI) (Photocoupler insulation) Digital output signal(DO) (Non-insulated)
Analog output (AO)
32 points
32 points
—
32 points
16 points
1 point
64 points
48 points
1 point
DX14*
(FCUA-DX14*) Digital input signal (DI) (Photocoupler insulation) Digital output signal(DO) (Non-insulated)
Analog input (AI)
Analog output (AO)
32 points
32 points
—
—
—
—
4 points
1 point
32 points
32 points
4 points
1 point
(Note)
The * mark in the table is 0 when the output is a sink type, and is 1 when the output is a
source type. The input is changeable.
2.1.1 DIO Specification Setting Switch
This switch is not used currently, and must always be set to OFF.
OFF
Front view
A
View from A direction
* Use at OFF.
2
DIO specification setting switch

2. SYSTEM CONFIGURATION
2.1 Relation of RIO Unit and Devices
2-4
2.1.2 Rotary Switch for Channel No. Setting
Rotary switch for setting No. of channels (3)
Set between 0 and 7.
The device used by the PLC is determined by the setting of the rotary switch for setting the No. of
channels.
Device No. read in Output device No.
Rotary
switch No. RIO-M RIO-M/S RIO-M RIO-M/S Analog
output (AO)
0 X00~X1F X100~X11F Y00~Y1F (Y0F) Y100~Y11F (Y10F)
1 X20~X3F X120~X13F Y20~Y3F (Y2F) Y120~Y13F (Y12F)
2 X40~X5F X140~X15F Y40~Y5F (Y4F) Y140~Y15F (Y14F)
3 X60~X7F X160~X17F Y60~Y7F (Y6F) Y160~Y17F (Y16F)
4 X80~X9F X180~X19F Y80~Y9F (Y8F) Y180~Y19F (Y18F)
5 XA0~XBF X1A0~X1BF YA0~YBF (YAF) Y1A0~Y1BF (Y1AF)
6 XC0~XDF X1C0~X1DF YC0~YDF
(YCF) Y1C0~Y1DF (Y1CF)
7 XE0~XFF X1E0~X1FF YE0~YFF (YEF) Y1E0~Y1FF (Y1EF)
The rotary
switches
correspond to
the file
registers
R100 to R103
in order of
small
numbers.
The values shown in parentheses are the device range when mounted to the right side of the unit.
No. of channels occupied by each unit
No. of occupied channels Unit name
1 DX100/DX101
2 DX110/DX111, DX120/DX121, DX140/DX141
Several remote I/O units can be used in combination. Make sure that the total of stations possessed
by the serial link connection (MC link B) is 8 stations or less. Set a unique station No. for each unit
and make sure that these station numbers are not duplicated. There is one station No. setting rotary
switch on the DX10* unit, and two on the DX11*/12*/14* unit.
Set as shown below when connected to the communication terminal (CR05).
Rotary switch No. Device No. read in Output device No.
0 R90, R91 R190, R191
1 R92, R93 R192
2 R94, R95 R193, R194
3 R96, R97 R195

2. SYSTEM CONFIGURATION
2.1 Relation of RIO Unit and Devices
2-5
2.1.3 Relation of Connector Pins and Device
(1) Input (DI) signal ((1)/(8))
B20 pin
Connector for contact input (DI)
((1)/(8))
A
20 pin
B01 pin
A
01 pin
B
A
X00
X3F
1
2
3
Signal
DC+24V IN
0V
FG
+24V
0V
Stabilized
power supply
FG
Connection for contact common = GND
Connection for contact common = DC+24V
1
2
3
(7)
Set rotary switch to 0 Set rotary switch to 1
(1) (8)
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
X00
X01
X02
X03
X04
X05
X06
X07
X08
X09
X0A
X0B
X0C
X0D
X0E
X0F
X10
X11
X12
X13
X14
X15
X16
X17
X18
X19
X1A
X1B
X1C
X1D
X1E
X1F
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
B
A
X30
X31
X32
X33
X34
X35
X36
X37
X38
X39
X3A
X3B
X3C
X3D
X3E
X3F
X20
X21
X22
X23
X24
X25
X26
X27
X28
X29
X2A
X2B
X2C
X2D
X2E
X2F
COM
+24V
+24V 0V
0V 0V
0V
+24V
+24V
COM COM
COM
(Note 1) The No. of points (devices) will differ according to the RIO unit type.
(Note 2) The devices shown here show an example for when the rotary switch for channel No.
setting on the RIO unit is set to 0 and set to 1.
Refer to section "2.1.2 Rotary Switch for Channel No. Setting" for details on the relation of
the rotary switch and device No.

2. SYSTEM CONFIGURATION
2.1 Relation of RIO Unit and Devices
2-6
(2) Output (DO) signal ((4)/(9))
B20 pin
A
20 pin
Connector for contact input (DO)
((4)/(9))
B01 pin
A
01 pin
Set rotar
y
switch to 0 Set rotar
y
switch to 1
(4) (9)
B
A
B
A
Y00
Y01
Y02
Y03
Y04
Y05
Y06
Y07
Y08
Y09
Y0A
Y0B
Y0C
Y0D
Y0E
Y0F
+24V
+24V
Y10
Y11
Y12
Y13
Y14
Y15
Y16
Y17
Y18
Y19
Y1A
Y1B
Y1C
Y1D
Y1E
Y1F
0V
0V
X20
X21
X22
X23
X24
X25
X26
X27
X28
X29
X2A
X2B
X2C
X2D
X2E
X2F
(7) 1
2
3
1
2
3
Signal
DC+24V IN
0V
FG
Connection for contact common = GND
Connection for contact common = DC+24V
+24V
0V
FG
Stabilized
power supply
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1+24V
+24V 0V
0V
Y00
L
Y2F
L
A
O*
A
O
A
nalog output
(For DX120/1 only)
(Note 1) The No. of points (devices) will differ according to the RIO unit type.
(Note 2) The devices shown here show an example for when the rotary switch for channel No.
setting on the RIO unit is set to 0 and set to 1.
Refer to section "2.1.2 Rotary Switch for Channel No. Setting" for details on the relation of
the rotary switch and device No.
(Note 3) The A4 and B4 pin analog output (AO, AO*) in the output connector (5) is found only on
the RIO unit DX120/DX121.

2. SYSTEM CONFIGURATION
2.2 Outline of Digital Signal Input Circuit
2-7
2.2 Outline of Digital Signal Input Circuit
There is a sink type digital signal input circuit and source type digital signal input circuit. Either
method can be selected with each unit's card unit.
Control
circuit
COM
0V
24VDC(+)
(Machine side) DI-L/DI-R ((1)/(8))
A3,B3
Input circuit
COM
Sink type
2.2kΩ
2.2kΩ
2.2kΩ
2.2kΩ
2.2kΩ
Control
circuit
2.2kΩ
2.2kΩ
2.2kΩ
2.2kΩ
2.2kΩ
(Machine side)
Source type
A3,B3
0V
24VDC(+)
24VDC(+)
24VDC(+)
24VDC(+)
24VDC(+)
0V
0V
0V
0V
DI-L/DI-R ((1)/(8))

2. SYSTEM CONFIGURATION
2.2 Outline of Digital Signal Input Circuit
2-8
Input conditions
The input signal must be used within the conditions shown below.
Sink type
Input voltage when external contact is ON 6V or less
Input current when external contact is ON 9mA or more
Input voltage when external contact is OFF 20V or more, 25.2V or less
Input current when external contact is OFF 2mA or less
Tolerable chattering time 3ms or less
(Refer to T1 in drawing below)
Input signal hold time 40ms or more
(Refer to T2 in drawing below)
Input circuit operation delay time 3ms
≤T3
=
.
.
T4
≤16ms
Machine side contact capacity +30V or more, 16mA or more
T1 T1
T2
T3 T4
Source type
Input voltage when external contact is ON 18V or more, 25.2V or less
Input current when external contact is ON 9mA or more
Input voltage when external contact is OFF 4V or less
Input current when external contact is OFF 2mA or less
Tolerable chattering time 3ms or less
(Refer to T1 in drawing below)
Input signal hold time 40ms or more
(Refer to T2 in drawing below)
Input circuit operation delay time 3ms
≤T3 =
.
. T4
≤16ms
Machine side contact capacity +30V or more, 16mA or more
T1 T1
T2
T3 T4
(Note) The input signal hold time 40ms or more is a reference. The input signal will not be
recognized unless the input signal is held for longer than the ladder process cycle time.

2. SYSTEM CONFIGURATION
2.3 Outline of Digital Signal Output Circuit
2-9
2.3 Outline of Digital Signal Output Circuit
There is a sink type (DX1*0) digital signal output circuit and source type (DX1*1) digital signal
output circuit. Use this circuit within the range shown below.
Output circuit
24VDC(+)
R
24VDC(+) R
A
PL
(Machine side) DO-L/DO-R ((4)/(9))
Control
circuit
Control
circuit
Sink type (DX1*0)
(Machine side)
Source type (DX1*0)
R
A
PL
R
DO-L/DO-R ((4)/(9))
Output conditions
Insulation method Non-insulating
Rated load voltage +24VDC
Max. output current 60mA/point
Output delay time 40µs
<Caution>
* When using a conductive load such as a relay, always connect a diode (withstand voltage 100V
or more, 100mA or more) parallel to that load.
* When using a capacity load such as a lamp, connect a protective resistance (R=150ohm)
serially to that load to limit the rush current. (Make sure that the current is lower than the
tolerable current including the momentary current.)
When using a conductive load such as relays, always contact a diode in parallel to the load as a
noise measure.
When using a capacity load such as a lamp, always connect a protective resistor serially to the
load to suppress rush currents.
CAUTION

2. SYSTEM CONFIGURATION
2.4 Outline of Analog Signal Output Circuit
2-10
2.4 Outline of Analog Signal Output Circuit
The analog signal circuit can be used only with the FCUA-DX120/DX121/DX140/DX141 unit.
Output circuit
DAC
R
220
Ω
R
A
0
A
0*
Output conditions Output voltage 0V to ±10V (±5%)
Resolution 12 bit (±10V x n/4096) (Note)
Load conditions 10kΩload resistance (standard)
Output impedance 220Ω
(Note) n=(2
0~ 211)
2.5 Outline of Analog Signal Input Circuit
The analog signal input circuit can be used only for the FCUA-DX140/DX141.
Input circuit
A
DC
150Ω
A
I
A
I*
Input conditions
Max. input rating ±15V
Resolution 10V/2000 (5mV)
Precision Within ±25mV
AD input sampling time 14.2ms (AI0)/42.6ms (AI1 to 3)

2. SYSTEM CONFIGURATION
2.6 Fixed Signals
2-11
2.6 Fixed Signals
The connector pin Nos. in the input signals that are fixed are shown below.
The pin No. cannot be changed because the signals are fixed in the controller.
Signal name Connector Signal name Connector
Emergency stop X407 Stroke end –1 X408
Reference point return near-point detection 1 X400 Stroke end –2 X409
Reference point return near-point detection 2 X401 Stroke end –3 X40A
Reference point return near-point detection 3 X402 Stroke end –4 X40B
Reference point return near-point detection 4 X403 Stroke end –5 X405
Reference point return near-point detection 5 X404 Stroke end +1 X40C
Sensor signal 1 X418 Stroke end +2 X40D
Sensor signal 2 X419 Stroke end +3 X40E
Sensor signal 3 X41A Stroke end +4 X40F
Sensor signal 4 X41B Stroke end +5 X406
2.6.1 Ignoring Fixed Signals
The fixed signals can be used as other signals by ignoring them with file registers. (Refer to the
following table.)
Note that the emergency stop signal (X407) can not be ignored with the following registers.
File register
Part system Ignore stroke end
signals Ignore near-point detection signals
$1 R920 R921
$2 R1020 R1021
$3 R1120 R1121
$4 R1220 R1221
$5 R1320 R1321
$6 R1420 R1421
$7 R1520 R1521
FEDCBA9876543210
File register (R920) Bit
1st axis OT ignored
2nd axis OT ignored
:
14th axis OT ignored
(Note 1) The signal is applicable to (+) and (-) motion at the same time (ignored when "ON").
FEDCBA9876543210
File register (R921) Bit
1st near-point ignored
2nd near-point ignored
:
14th near-point ignored

2. SYSTEM CONFIGURATION
2.6 Fixed Signals
2-12
2.6.2 Changing the Addresses of Fixed Signals
The fixed devices can be allocated arbitrarily with the following parameters.
The parameters #2073 to #2075 are valid when 1 is set in #1226 aux10 bit 5.
When the parameters #2073 to #2075 are valid, do not set the same device number. If the same
device number exists, an emergency stop occurs. However, no device number check is performed
for an axis to which a signal (R920~) that ignores the fixed signal is input.
When the arbitrary allocation is valid, the fixed signals (X400 to X40F) can be used as other signals.
# Items Details Setting range (unit)
1226 aux10
(bit5) Arbitrary allocation
of dog·OT
signal valid
Specify whether to enable the arbitrary allocation
parameter for the origin dog and H/W OT.
0: Disable arbitrary allocation. (Fixed device)
1: Enable arbitrary allocation. (Device specified
by the parameters #2073 to #2075)
0/1
2073 zrn_dog Origin dog
arbitrary
allocation
device
When it is desired to assign the origin dog signal to a
position other than the fixed device, specify the input
device in this parameter.
00 to FF (HEX)
2074 H/W_OT+ H/W OT+
arbitrary
allocation
device
When it is desired to assign the OT (+) signal to a
position other than the fixed device, specify the input
device in this parameter.
00 to FF (HEX)
2075 H/W_OT- H/W OT-
arbitrary
allocation
device
When it is desired to assign the OT (-) signal to a
position other than the fixed device, specify the input
device in this parameter.
00 to FF (HEX)

2. SYSTEM CONFIGURATION
2.7 Flow of Signals
2-13
2.7 Flow of Signals
Controller PLC
Signal in
controller D.D.B.
Y**
X**
Signal in
controller Input/output signal with
controller and machine
(X, Y)
Input
Output
Sequence program
High-speed
program
(per 7.1ms)
Main program
(Scan time with
program size)
Transfer at head of
main program
Machine/machine operation board
X**
X**
Y**
Y**
Input/output signal
with machine
(X, Y)
Transfer at head of high-speed
processing program
(per 7.1ms)
Internal relay,
latch relay, etc.
(M, F, L, • • •)