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FX
-J1939 User's Manual
3U
7.3
[BFM #1270 to #1272] Layer 2 RTR Flags
If the FX
-J1939 is set to Layer 2 communication mode, an incoming RTR message is indicated in the BFM
3U
if the following conditions are satisfied:
• Matching the "CAN-ID n
• The message "n
• The message "n
*1.
Where "n" is one of the messages 1 to 42.
The bits in the "Layer 2 RTR flags" are updated independently from BFM #20 bit 0.
A bit is set if a valid RTR message has been received. The bit can be evaluated by PLC program and the
required changes to the response message data can be made (BFM #20 bit 0 must be set in order to refresh
the internal data buffer and trigger the transmission). The flag is automatically reset when a message is
transmitted from the message.
BFM No.
BFM #1270
BFM #1271
BFM #1272
*1
" of one of the Layer 2 messages
*1
" is configured as a transmit message
*1
" is set to "no auto RTR response" (H6FFF)
Bit No.
Bit 0
RTR message for Layer 2 message 1 received
Bit 15
RTR message for Layer 2 message 16 received
Bit 0
RTR message for Layer 2 message 17 received
Bit 15
RTR message for Layer 2 message 32 received
Bit 0
RTR message for Layer 2 message 33 received
Bit 9
RTR message for Layer 2 message 42 received
Bit 10
Not Used
Bit 15
7 Layer 2 Communication Mode (11/29 bit ID)
7.3 [BFM #1270 to #1272] Layer 2 RTR Flags
Description
Read/Write
R
R
R
R
R
R
R
R
R
-
69
1
2
3
4
5
6
7
8
9
10
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