7-7
(3) ‘t2’ indicates the ‘stop detection’ time required before a U-turn can occur after overshooting.
After the VS-212DN has turned the operation output OFF and the brake ON (simultaneous
operation), a ‘stop’ status is recognized when the amount of current position change per 100 ms is
plus/minus 2 bits (as a sensor binary value). As soon as a stop status is detected, reverse
direction travel will be executed.
(4) ‘t3’ indicates the delay period (after positioning is stopped) from the point when the ‘brake release’
signals goes OFF (brake ON) until the point when the ‘positioning in progress’ signal goes OFF.
The ‘t3’ period is designated by the parameter (positioning end detection timer) setting.
(5) The ‘In-position’ signal is OFF during the positioning cycle (‘positioning’ signal is ON), except during
the ‘t3’ period.
If during the ‘t3’ period, or when positioning is ended, the current position value is within the
In-position zone of the designated target stop position, the ‘In-position’ signal will turn ON.
Although the In-position zone is passed through during the overshoot operation, the ‘In-position’
signal will not turn ON at that time. The In-position zone is designated by the parameter setting.
(6) The ‘In-position’ signal will always go OFF when the power is turned ON.
During an ‘online’ status, or during TEST mode operation, the ‘In-position’ signal will turn ON after
positioning is completed if the current position at that time is within the In-position zone of the
designated target stop position.
The ‘In-position’ signal is always the final output which occurs (if in position) after all positioning is
completed. (If the operation status is switched from ‘online’ to ‘offline’ while the ‘In-position’ signal
is ON during the RUN mode, the ‘In-position signal will go OFF. However, if the operation mode is
switched back to ‘online’, the ‘In-position signal will come back ON if the current position at that
time is still within the In-position zone of the designated target stop position,)
(7) Even if the current position value following the completion of the positioning cycle is outside either
the In-position zone or stop zone, the positioning operation will not be resumed. An ‘In-position’
status is indicated by an ‘In-position’ signal (status 6/7: 5 bit) from the sequence program.
(8) If the current position value is already within the In-position zone of the target stop position when
positioning is started, positioning will not occur, although the ‘positioning’ signal will come ON for a
‘t3’ period.
(9) Although the FWD and RVS signals are never output simultaneously during the positioning
operation, a ‘hardware interlock’ condition should be established at the motor, etc., drive circuits as
an additional precaution.
(10) ‘t4’ is the period which elapses between PLC I/O writing, and the start of VS-212DN operation.
This time period will be 20ms or longer under the following conditions.
o PLC scan time: 4ms.
o DeviceNet: 500kbps
o Slave connection unit: VS-212DN (1 unit)
Содержание Varlimit VS-212DN
Страница 1: ...U S E R S MAN U AL V S 2 1 2 DN NSP Z2004 7...
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Страница 47: ...5 1 5 Operations 5 1 Operating Sequence Flowchart An operation flowchart is shown below...
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Страница 94: ...8 3 8 1 Pre Operation Setting Sequence This section explains the setting sequence for the limit switch function...
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Страница 121: ...10 1 10 DIMENSIONS 10 1 VS 212DN Units mm...
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Страница 126: ...10 6 10 5 Extension Cable 1 4P S 0102 L 4P RBT 0102 L Units mm...
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