YASKAWA SI-T/ V7, Technical Manual

Page: 76 / 157

5-24
Continued
5.18 MULTI-FUNCTION INPUT TERMINALS (Term. S1-S7)
A. Data 17 : Remote/Local
The use of a Remote/Local command input allows switching between the Digital Operator control
and the external terminal input signals or serial communications, without the need to re-program
n003 or n004. If the status of the Remote/Local command input is changed while the drive is run-
ning, the Remote/Local operation selection is not completed until the next time the Drive is stopped.
Closed = Controlled locally (Digital Operator)
NOTE: Parameter n008 determines if the frequency reference will come from the digital
operator potentiometer or parameter n024.
Open = Controlled remotely (external terminal inputs, for Start/Stop and
frequency reference, or serial communications).
NOTE: When a multi-function input terminal is programmed for Local/Remote, the LO/RE LED will
only display local or remote status. Local/Remote cannot be adjusted from the digital operator.
B. Data 12 : External Base Block by N.O. Contact
• When either the Forward Run command or
Reverse Run command is present, and the
external Base Block command is applied
(i.e. contact closed), coast stop is accom-
plished (after a 20 msec delay), while the
frequency command is maintained.
When the Base Block command is removed,
the drive will recover in a manner similar
to that of Speed Search operation.
• When both the Forward Run command
and Reverse Run command are open, and
the external Base Block command is applied
(i.e. contact closed), coast stop is accomplished and after a 20 msec delay the frequency
command is changed to 0Hz. When the Base Block command is removed, the drive will
remain in stopped condition until Forward Run command or Reverse Run command is again
applied.
• When external Base Block command is active, a blinking “ b b ” will be displayed
on the Digital Operator.
S6
SC
0V
EXTERNAL
BASE BLOCK
o o
RUN RUN
Freq. Cmd Freq. Cmd
0 0
Base Block Base Block
V out V out
0 0
20msec 20msec
(A) Base Block With Run Active (B) Base Block After Stop Command
Drive