4
- 18
4.1 Cyclic Transmission Function
4.1.4 Direct access to link devices
4
FUNCTIONS
(b) Direct access on the receiving side
1) When near step 0
Direct access functions almost in the same way as link refresh.
2) When near END
Direct access is faster than link refresh by up to one sequence scan time.
Figure 4.20 Link refresh
Figure 4.21 Direct access
Figure 4.22 Link refresh
Figure 4.23 Direct access
END
0
END
0
END
Sequence scan
Link scan
B0
B0
END
Sequence scan
Link scan
0
END
0
END
J1\B0
J1\B0
END
0
END
0
END
B0
B0
Sequence scan
Link scan
END
0
END
0
END
Sequence scan
Link scan
J1\B0
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