
B-65150E/04 4. SERVO FUNCTION DETAILS
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(4) RISC feed-forward function (type 2)
(a) Overview
An improvement has been made to further increase servo response
when the distribution period is 4 ms, 2 ms, or 1 ms in the HPCC
mode.
(b) Series and editions of applicable servo software
(For a distribution period of 2 ms or 1 ms)
Series 9080/C(03) and subsequent editions (Series 15-B, 16-C)
Series 9081/C(03) and subsequent editions (Series 15-B, 16-C)
Series 9090/C(03) and subsequent editions (Series 16i, 18i)
Series 90A0/A(01) and subsequent editions (Series 15i, 16i,
18i)
(For a distribution period of 4 ms)
Series 90A0/I(09) and subsequent editions (Series 15i, 16i, 18i)
(c) Setting parameters
#7 #6 #5 #4 #3 #2 #1 #0
1959
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RISCFF
2017
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RISCFF (#5) 1: Feed-forward response improves when RISC is used.
0: Feed-forward response remains unchanged when RISC is used.
NOTE
1 Use this function only when very high command
response is required.
2 When using this function, set a detection unit of 0.1
µm wherever possible.
(A detection unit of 0.1 µm can be set by using the
IS-C unit or by multiplying the CMR and flexible feed
gear by 10 with the IS-B system.)
3 When this function is enabled, servo response to
commands increases. So, vibration can occur,
depending on the resonance frequency of the
machine system. In such a case, use the conventional
control method instead of this function.