CHAPTER 11 FCAN CONTROLLER
539
User’s Manual U14492EJ3V0UD
<10> Overload frame
An overload frame is output starting from the first bit in an intermission in cases where the receiving
node is not yet ready to receive.
If a bit error is detected in intermission mode, it is output starting from the bit following the bit where
the bit error was detected.
Figure 11-19. Overload Frame
<1>
R
D
<2>
<3>
6 bits
0 to 6 bits
8 bits
(<4>)
(<5>)
Interframe space or overload frame
Overload delimiter
Overload flag (node n)
Overload flag (node m)
Frame
Overload frame
No
Name
Bit count
Definition
<1>
Overload flag starting from
node m
6
Consecutive output of 6 “dominant (D)” bits.
Output when node m is not ready to receive.
<2>
Overload flag starting from
node n
0 to 6
Node n, which has received an overload flag in the
interframe space, outputs an overload flag.
<3>
Overload delimiter
8
8 consecutive “recessive (R)” bits are output.
If a “dominant (D)” bit is detected as the eighth bit, an
overload frame is sent starting at the next bit.
<4>
Frame
–
Output following an end of frame, error delimiter, or
overload delimiter.
<5>
Interframe space or
overload frame
3/10
20 MAX.
An interframe space or overload frame starts from here.
Remark
n
≠
m
Содержание V850E/IA1 mPD703116
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