Mitsubishi Electric MELSEC-F FX3U-J1939 User Manual page 66

FX -J1939 User's Manual
3U
Transmission Type K4
Transmission type K4 will trigger the transmission only upon explicit request from the network or PLC/user
trigger.
1) Transmission Type K4 (trigger via remote request frame)
When the FX
most recent internal data that is copied from the BFM every time BFM #20 bit 0 is set to ON.
BFM #25 bit 4
BFM #20 bit 0
BFM #100 to #103
Data
Data message 1
(internal)
incoming request
Transmission
Type K4
2) Transmission Type K4 (trigger via PLC/user flag)
The message transmits when the corresponding message transmit trigger flag in BFM #1280 to #1284 is
set to ON.
BFM #25 bit 4
BFM #20 bit 0
BFM #100 to #103
Data
Data message 1
(internal)
BFM #1280 bit 0
Transmission
Type K5
4. Interval [in units of 10 ms]
The Interval setting is used when the transmission type (ttype) is set to K2 or K3.
Setting is in units of 10 ms. The maximum value is K65535 (HFFFF) = 655.35 seconds.
The Interval must be longer than the min. interval, which is calculated by the following formula:
min.interval = INT
Example: BFM #505 = K58 (DLC)
min.interval = INT
Interval setting: BFM #504 = K52 (K52 x 10 ms > min. interval time)
Note
• The Interval should be set while taking into consideration the PLC scan cycle and communications
response time, etc.
• If Interval is set to K0, it is automatically adjusted to K1 and operation at 10 ms.
• Values larger than K32767 will be displayed as negative values by the monitor software.
56
-J1939 receives a valid request frame for supported information, it will respond with the
3U
Configuration mode
H0000
H0000
REQ
H0000
Configuration mode
H0000
H0000
H0000
DLC + 13
51 ms
7
58 + 13
51 ms = 10
7
Online mode
H5555
H5555
REQ REQ
H0000 H5555
Online mode
H5555
H5555
H0000 H5555
51 ms = 510 ms
6 J1939 Communication Mode
6.2 [BFM #500 to #973] Configuration Area
HAAAA
HAAAA
REQ
H5555 HAAAA
HAAAA
HAAAA
H5555 HAAAA