This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
Warranty
Mitsubishi will not be held liable for damage caused by factors found not to be
the cause of Mitsubishi; opportunity loss or lost profits caused by faults in the
Mitsubishi products; damage, secondary damage, accident compensation
caused by special factors unpredictable by Mitsubishi; damages to products
other than Mitsubishi products; and to other duties.
For safe use
This product has been manufactured as a general-purpose part for general
industries, and has not been designed or manufactured to be incorporated in
a device or system used in purposes related to human life.
Before using the product for special purposes such as nuclear power, electric
power, aerospace, medicine or passenger movement vehicles, consult with
Mitsubishi Electric.
This product has been manufactured under strict quality control. However
when installing the product where major accidents or losses could occur if the
product fails, install appropriate backup or failsafe functions in the system.
HEAD OFFICE : TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310, JAPAN
3.1 Applicable Cable and Connector
3.1.1
Applicable connector
FX
3U
-J1939 uses a CAN bus connector. This connector is removable.
For removal and installation of the CAN bus connector, refer to the following
section.
Refer to subsection 3.1.4
3.1.2
Applicable cable
*1 Shielded twisted pair cable is recommended.
*2 When bus length is long, use thicker wire. For details, refer to the following
manual.
FX
3U
-J1939 User’s Manual
3.1.3
Termination of cable end
Strip 9 mm (0.35") of insulation from the end of the wire.
In case of stranded wires, use wire ferrules. Refer to the
following manual.
FX
3U
-J1939 User’s Manual
The tightening torque must be 0.4 to 0.5 N
m.
Do not tighten terminal screws with a torque outside the above-mentioned range.
Failure to do so may cause equipment failures or malfunctions.
3.1.4
Removal and installation of CAN connector
1) Removal
Evenly unscrew both CAN connector mounting screws, and remove the
CAN connector from the module.
If the cable is attached to the connector, hold and pull the connector on the
side. Do not pull the cable.
2) Installation
Place the CAN connector in the specified position, and evenly tighten both
CAN connector mounting screws.
Tightening torque 0.4 to 0.5 N
m
Do not tighten the terminal block mounting screws with a torque outside the
above-mentioned range.
Failure to do so may cause equipment failures or malfunctions.
Make sure to properly wire to the terminal block (CAN bus connector) in
accordance with the following precautions.
Failure to do so may cause electric shock, equipment failures, a short-circuit,
wire breakage, malfunctions, or damage to the product.
- The disposal size of the cable end should follow the dimensions described
in the manual.
- Tightening torque should follow the specifications in the manual.
- Twist the end of strand wire and make sure that there are no loose wires.
- Do not solder-plate the electric wire ends.
- Do not connect more than the specified number of wires or electric wires
of unspecified size.
- Affix the electric wires so that neither the terminal block nor the connected
parts are directly stressed.
Make sure to observe the following precautions in order to prevent any
damage to the machinery or accidents due to abnormal data written to the
PLC under the influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the
main circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take
place. As a guideline, lay the control line at least 100 mm (3.94") or more
away from the main circuit or high-voltage lines.
2) Ground the shield wire or shield of a shielded cable.
Do not use common grounding with heavy electrical systems (refer to
the manual of the PLC main unit).
Place the communication cable in grounded metallic ducts or conduits both
inside and outside of the control panel whenever possible.
Item
Applicable Cable
SAE J1939-11, CAN (Layer 2)
SAE J1939-15
Cable Type
Twisted pair cable
Unshielded/Shielded
Shielded
Unshielded
*1
No. of Pairs
2 pair
Conformance Standard
ISO 11898/1993
Wire Size
0.3 mm
2
to 0.82 mm
2
(AWG22 to 18)
*2
Impedance
120
WIRING PRECAUTIONS
9mm
(0.35")
3.2 CAN-Bus Wiring
3.2.1
Connecting communication cables
For electromagnetic compatibility (EMC), it is recommended to ground the cable shield
at both ends.
Caution
For safety, always check the potential differences between the grounding points. If
potential differences are found, proper measures must be taken to avoid damage.
3.2.2
Module wiring
For PLC wiring details, refer to the following manual.
Refer to the FX
3G
Series User's Manual - Hardware Edition
Refer to the FX
3GC
Series User's Manual - Hardware Edition
Refer to the FX
3U
Series User's Manual - Hardware Edition
Refer to the FX
3UC
Series User's Manual - Hardware Edition
*1 An FX
2NC
-CNV-IF or FX
3UC
-1PS-5V is necessary to connect the FX
3U
-J1939 to
an FX
3GC
/FX
3UC
Series PLC.
3.2.3
Grounding of twisted pair cable
Strip a part of the coating of the shielded twisted pair cable as shown below, and
ground at least 35 mm (1.38") of the exposed shield section.
3.2.4
Termination
The J1939 network requires terminating resistors for both network ends. When FX
3U
-
J1939 is the network end, connect the included terminating resistor (120
1/2W)
between pin number 2 (CAN_L) and 4 (CAN_H).
3.3 Grounding
For details, refer to the following manual.
FX
3U
-J1939 User’s Manual
4. Specifications
DESIGN PRECAUTIONS
Make sure to have the following safety circuits outside of the PLC to ensure safe
system operation even during external power supply problems or PLC failure.
Otherwise, malfunctions may cause serious accidents.
1) Most importantly, have the following: an emergency stop circuit, a protection
circuit, an interlock circuit for opposite movements (such as normal vs.
reverse rotation), and an interlock circuit (to prevent damage to the
equipment at the upper and lower positioning limits).
2) Note that when the PLC CPU detects an error, such as a watchdog timer
error, during self-diagnosis, all outputs are turned off. Also, when an error
that cannot be detected by the PLC CPU occurs in an input/output control
block, output control may be disabled.
External circuits and mechanisms should be designed to ensure safe
machinery operation in such a case.
For the operating status of each node in the case of a communication error, see
the FX
3U
-J1939 user’s manual and the product manual of each node.
Erroneous output or malfunctions may cause an accident.
Terminating
resistor
Terminating
resistor
Grounding resistance of 100
Ω
or less (Class D)
CAN_GND
CAN_L
CAN_SHLD
CAN_H
CAN_V+
CAN_GND
CAN_L
CAN_SHLD
CAN_H
CAN_V+
CAN_GND
CAN_L
CAN_SHLD
CAN_H
CAN_V+
FX
3U
-
J1939
FX
3G
/
FX
3GC*1
/
FX
3U
/FX
3UC*1
Series PLC
CAN_GND
CAN_L
CAN_SHLD
CAN_H
CAN_V+
CAN Bus connector
Strip a part of the coating of the shielded twisted pair cable as shown subsection 3.2.3.
Ground the PLC’s grounding terminal there.
Grounding resistance of
100
Ω
or less (Class D)
Grounding mounting plate
or grounded DIN rail with
a grounding resistance of
100
Ω
or less (Class D).
Shielded twisted pair cable
Shield
4.1 Applicable PLC
The version number can be checked by reading the last three digits of device D8001/
D8101.
*1 An FX
2NC
-CNV-IF or FX
3UC
-1PS-5V is necessary to connect the FX
3U
-J1939 to
an FX
3GC
/FX
3UC
Series PLC.
*2 Check the current consumption of the connected extension blocks and insert
extension power supply units if necessary.
*3 Up to 7 units can be connected to the FX
3UC
-32MT-LT(-2) PLC.
4.2 General Specifications
Items other than the following are equivalent to those of the PLC main unit.
For general specifications, refer to the manual of the PLC main unit.
Refer to the FX
3G
Series User's Manual - Hardware Edition
Refer to the FX
3GC
Series User's Manual - Hardware Edition
Refer to the FX
3U
Series User's Manual - Hardware Edition
Refer to the FX
3UC
Series User's Manual - Hardware Edition
When executing control (data changes) to an operating PLC, construct an
interlock circuit in the sequence program so that the entire system operates safely.
In addition, when executing control such as program changes and operation
status changes (status control) to an operating PLC, thoroughly read the manual
and sufficiently confirm safety in advance. Especially in control from external
equipment to a PLC in a remote place, problems in the PLC may not be able to be
handled promptly due to abnormality in data transfer. Construct an interlock circuit
in the sequence program. At the same time, determine the actions in the system
between the external equipment and the PLC for protection against abnormalities
in data transfer.
DESIGN PRECAUTIONS
Make sure to observe the following precautions in order to prevent any damage to
the machinery or accidents due to abnormal data written to the PLC under the
influence of noise:
1) Do not bundle the main circuit line together with or lay it close to the main
circuit, high-voltage line or load line.
Otherwise, noise disturbance and/or surge induction are likely to take place.
As a guideline, lay the control line at least 100 mm (3.94") or more away from
the main circuit or high-voltage lines.
2) Ground the shield wire or shield of a shielded cable.
Do not use common grounding with heavy electrical systems (refer to the
manual of the PLC main unit).
STARTUP AND
MAINTENANCE
PRECAUTIONS
Do not disassemble or modify the PLC.
Doing so may cause fire, equipment failures, or malfunctions.
For repair, contact your local Mitsubishi Electric representative.
Turn off the power to the PLC before connecting or disconnecting any extension
cable.
Failure to do so may cause equipment failures or malfunctions.
Do not drop the product or exert strong impact to it.
Doing so may cause damage.
DISPOSAL PRECAUTIONS
Please contact a certified electronic waste disposal company for the
environmentally safe recycling and disposal of your device.
TRANSPORTATION AND
STORAGE PRECAUTIONS
The PLC is a precision instrument. During transportation, avoid impacts larger
than those specified in the general specifications of the PLC main unit manual.
Failure to do so may cause failures in the PLC. After transportation, verify the
operations of the PLC.
Model name
Applicability
FX
3G
Series PLC
Ver. 1.00 and later (Up to 8 blocks can be extended
*2
)
FX
3GC
Series PLC
*1
Ver. 1.40 and later (Up to 8 blocks can be extended
*2
)
FX
3U
Series PLC
Ver. 2.20 and later (Up to 8 blocks can be extended
*2
)
FX
3UC
Series PLC
*1
Ver. 2.20 and later (Up to 8 blocks can be extended
*2*3
)
Item
Specification
Dielectric Withstand Voltage
500 V AC for one minute Between all
t e r m i n a l s a n d g r o u n d
terminal
Insulation Resistance
5 M
or more by 500 V
DC megger
DESIGN PRECAUTIONS
4.3 Power Supply Specification
For details on the 24 V DC power supply of main unit, refer to the manual of the
PLC main unit.
4.4 Performance Specifications
Item
Specification
Internal Power Supply
24 V DC, max 110 mA
24 V DC power is supplied internally from the main
unit.
Item
Specification
Transmission Type
CAN Bus network
Applicable Function
J1939 Node or CAN Layer 2 Node
J1939 Services According to
SAE Standards
SAE J1939, SAE J1939-11, SAE J1939-15,
SAE J1939- 21, SAE J1939-71, SAE J1939-73,
SAE J1939-75, SAE J1939-81
Network Size
SAE J1939-11 2 to 30 nodes / segment
SAE J1939-15 2 to 10 nodes / segment
CAN (Layer 2) 2 to 127 nodes
Communication Method
Cyclic, acyclic or request driven
S u p p o r t e d
Transmission
Speed / Max.
Bus Length
SAE J1939-11 250 kbps / 40 m (131'2"), stubs max. 1 m (3'3")
SAE J1939-15 250 kbps / 40 m (131'2"), stubs max. 3 m (9'10")
CAN (Layer 2)
1 Mbps / 25 m (82')
800 kbps / 50 m (164')
500 kbps / 100 m (328'1")
250 kbps / 250 m (820'2")
125 kbps / 500 m (1640'5")
100 kbps / 600 m (1968'6")
50 kbps / 1000 m (3280'10")
20 kbps / 2500 m (8202'1")
10 kbps / 5000 m (16404'2")
Connection Cable
Refer to subsection 3.1.2.
Terminating Resistor
120
Accessory: 120
1/2W)
No. of Occupied I/O Points
8 points
(taken from either the input or output points of
the PLC)
