8: J1939 C
OMMUNICATION
8-22
FC6A S
ERIES
M
ICRO
S
MART
A
LL
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IN
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T
YPE
C
OMMUNICATION
M
ANUAL
FC9Y-B1730
Undesignated CA
These settings configure messages that are exchanged as broadcasts without specifying specific CAs.
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Receive Message tab
This tab configures messages that are transmitted from other CAs to the J1939 communication network as broadcasts.
(1) Device Settings
Sets the data registers that will be used by the received messages.
S1 (Control Register)
Sets the starting address of the data registers that will store the receive results.
Settings
Description
Tag name
Specifies the tag name of the device or the device address.
Device address
Shows the device address that corresponds to the tag name.
Comment
Shows the comment for the device address. This item can be edited.
Storage
Destination
Item
Description
Starting 0
Received data length
This register stores the length of the received message data.
If the message that will be received exceeds 8 bytes, a multi-
packet message split into 8-byte packets will be received. After
the multi-packet message has finished being received, the split
data is combined and stored in the data storage destination.
If the length of the received message data is longer than the
maximum data length, the maximum data length is stored and
100 is stored in the receive results status.
Starting 1
Source address
This register stores the source address of the received message.
Starting 2
Receive results status
This register stores the receive results. To initialize this register,
write "0".
For details on the receive results status, see "Receive results
status" on page 8-16.
Starting 3
Receive action flag
Stores the action flag for receiving.
Bit 0
Receive buffer overwrite flag
When the internal receive buffer was overwritten by the next
message before the message data stored in the receive buffer
could be written to the data storage destination, this register
turns on for one scan.
Bits 1 to 15
Reserved
Starting 4
Reserved
(1)
(2)
(3)
(4)