
B–63443EN/02
24. SPEED CONTROL SERVO ALARM
IGNORE SIGNAL (INPUT)
IGNVRY <G066#0>
PMC INTERFACE
221
24
SPEED CONTROL SERVO ALARM IGNORE SIGNAL
(INPUT) IGNVRY <G066#0>
If the speed control servo alarm is issued and this signal is high, the
control unit ignores the alarm, thus preventing the alarm state from being
set.
While this signal is “1”, the control unit ignores the speed control servo
alarm (alarm 401: VRDY OFF); consequently, the alarm state is not set.
The alarm state is set if an alarm other than the speed control servo alarm
is issued, however. If IGNVRY makes a “0” to “1” transition after the
speed control servo alarm has been issued, the alarm state is not canceled.
Only the speed control servo alarm issued while this signal is “1” is
ignored.
Application:Suppose an application exists which has a safety provision
to switch off the magnetic contactor (MCC) of the servo unit
when the limit switch on at the door of the splash guard is
activated when the splash guard is opened. This signal can
be used in such an application. When the MCC of the servo
unit is switched off, the speed control servo alarm is issued.
By making the IGNVRY signal “1” beforehand, however,
the alarm can be ignored.
When making IGNVRY “1”, be sure to make the feed hold
signal
*
SP [12.2] “0” at the same time to prevent automatic
operation from being activated.
t
IGNVRY
*
SP
The MCC of
the servo unit
ON/OFF
t
t : more than 100 ms
ON OFF