SV0401(X)IMPROPER V-ERADY OFF是什么意思

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FANUC系統報警
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SV0401(A)IMPROPER V-ERADY OFF
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SV0401(B)IMPROPER V-ERADY OFF
7 Z3 Y7 g# J3 C9 N* g* Y) [) p. D是什么意思，怎么排除
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