1 Introduction
1.1 Outline
14
FX
3U
-J1939 User's Manual
3. Support a Command Interface (CIF)
The command interface is a tool to execute asynchronous network services, module configuration and
diagnosis features. The following table shows the supported functions.
*1.
FX
3U
-J1939 firmware Ver. 1.10 or later is applicable.
4. To read and write to the buffer memory
To read and write the buffer memory in the FX
3U
-J1939, use the FROM/TO instructions or direct specification
of the buffer memory. However, only FX
3U
/FX
3UC
/FX5U/FX5UC PLC supports direct specification of the
buffer memory.
For further information on applied instructions, bit specification of word devices and direct specification of
buffer memory, refer to the following manual.
Refer to PROGRAMMING MANUAL
Note
Buffer memory that is assigned in 32 bits must use 32-bit instructions to read/write.
32-bit data cannot be correctly read/written from/to buffer memory if 16-bit read/write instructions are used.
Command
Function Mode Selection
Reference
J1939
Communication
Mode
Layer 2
Communication
(11 bit ID)
Mode
Layer 2
Communication
(29 bit ID)
Mode
Sending Layer 2 Message
-
Section 9.2
Sending PGN
-
-
Section 9.3
Request PGN
*1
-
-
Section 9.4
Set up PLC RUN>STOP messages
-
-
Section 9.5
Reset command interface
Section 9.6
Display current Parameter
Section 9.7
