8: J1939 C
OMMUNICATION
8-4
FC6A S
ERIES
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ICRO
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MART
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C
OMMUNICATION
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ANUAL
FC9Y-B1730
Specifications
Special PGNs Handled by the CAN J1939 All-in-One Type
A portion of PGNs are used internally to control the MicroSmart. These PGNs cannot be received, even when they are set as
receive messages.
PGNs that cannot be set as receive messages
Communication Control
Checking if J1939 communication is permitted/prohibited and checking the communication status can be performed with special
internal relays and special data registers.
Note:
R/W stands for read/write and allows reading and writing. R is read-only. W is write-only.
Special Internal Relay Allocations
J1939 Communication Permitted Flag (M8300)
Controls whether J1939 communication is permitted or prohibited.
0: Communication prohibited (default)
1: Communication permitted
Item
Description
Comments
Supported SAE J1939
SAE J1939-11: Physical Layer, 250 K bits/s, Twisted Shielded Pair
SAE J1939-15: Reduced Physical Layer, 250 K bits/s, Un-Shielded Twisted Pair
SAE J1939-21: Data Link Layer
SAE J1939-71: Vehicle Application Layer
SAE J1939-73: Application Layer - Diagnostics
SAE J1939-75: Application Layer - Generator Sets and Industrial
SAE J1939-81: Network Management
Baud Rate
250 k [bps]
Transmit Methods
Event transmission, cycle transmission
Receive Methods
Receive in ladder END, with cycle monitoring
Maximum Number of
Nodes
128 nodes
The number of CAs that can be
managed with address management
Maximum Number of
Send Message
100
Maximum Number of
Received Messages
200
Maximum Length of
Transmitted Message
252 bytes
Maximum Length of
Receive Message
252 bytes
Network Management
Enabled
Resolves address conflicts, monitors
the addresses of neighboring CAs
PGN
Parameter Name
Description
59392 (E800h)
Acknowledgment
Used for responses between CAs.
59904 (EA00h)
Request
Used to request PGN transmission.
60160 (EB00h)
Data Transfer Message
Used to exchange multi-packet messages 9 bytes or longer.
60416 (EC00h)
Connection Management Message
60928 (EE00h)
Address Claim
Used for address management on the network.
Special Internal Relays
Description
Setting Timing
R/W
M8300
J1939 Communication Permitted Flag
R/W
M8301
J1939 Online Status
Every scan
R
M8302
J1939 Local Station Address Confirmation Status
Every scan
R
M8303
J1939 Communication Error Output
Every scan
R
M8304
J1939 Communication Bus Off Occurrence Output
Every scan
R