Omron SX-F, Инструкция по эксплуатации

Страница: 64 / 316

56
Parameter sets
Section 7-1
• Set relay 1, menu [551] to AutoRst Trip; a signal will be available when the
maximum number of restarts is reached and the VSD stays in fault condi-
tion.
• The reset input must be constantly activated.
7-1-5 Reference priority
The active speed reference signal can be programmed from several sources
and functions. The table below shows the priority of the different functions
with regards to the speed reference.
7-1-6 Preset references
The VSD is able to select fixed speeds via the control of digital inputs. This
can be used for situations where the required motor speed needs to be
adapted to fixed values, according to certain process conditions. Up to 7 pre-
set references can be set for each parameter set, which can be selected via
all digital inputs that are set to Preset Ctrl1, Preset Ctrl2 or Preset Ctrl3. The
amount digital inputs used that are set to Preset Ctrl determines the number
of Preset References available; using 1 input gives 1 speed, using 2 inputs
gives 3 speeds and using 3 inputs gives 7 speeds.
Example
The use of four fixed speeds, at 50 / 100 / 300 / 800 rpm, requires the follow-
ing settings:
• Set DigIn 5 as first selection input; set [525] to Preset Ctrl1.
• Set DigIn 6 as second selection input; set [526] to Preset Ctrl2.
• Set menu [341], Min Speed to 50 rpm.
• Set menu [362], Preset Ref 1 to 100 rpm.
• Set menu [363], Preset Ref 2 to 300 rpm.
• Set menu [364], Preset Ref 3 to 800 rpm.
With these settings, the VSD switched on and a RUN command given, the
speed will be:
• 50 rpm, when both DigIn 5 and DigIn 6 are low.
• 100 rpm, when DigIn 5 is high and DigIn 6 is low.
• 300 rpm, when DigIn 5 is low and DigIn 6 is high.
• 800 rpm, when both DigIn 5 and DigIn 6 are high.
Table 19 Reference priority
Jog Mode Preset Reference Motor Pot Ref. Signal
On/Off On/Off On/Off Option cards
On On/Off On/Off Jog Ref
Off On On/Off Preset Ref
Off Off On
Motor pot com-
mands