X4 AC Drive User’s Manual
Chapter 7: X4 Parameters
1428D-0607
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© 2007 TB Wood’s All Rights Reserved
X4 Sequencer Speed Selection
Table 7-5 gives more information on the speed selection options available in the X4 sequencer by
programming bits 0, 1, and 2 of each state’s control parameter. The options include any Preset Speed,
Max Frequency, or allowing the reference to be determined in the normal X4 control path.
X4 Sequencer Ramping Selection
When the sequencer is active, the active ramp is no longer determined by parameter “Ramp Select.”
The user, however, does have the choice of using the main ramps (Accel Time 1/Decel Time1), or
the alternate ramps (Accel Time 2/Decel Time 2) for each independent state. This is determined by
bit 3 of the control parameter. If bit 3 is set to 1, then the alternate ramps are used (Accel Time 2/
Decel Time 2).
Sequencer Output Configuration
The X4 Program Sequencer allows digital outputs to be activated during states of the sequencer. This
function could be used to activate other devices in a system or to signal to an operator when a part
of the sequence is active. The user sets the digital output by setting bits 9 and 10 of the control
parameter with a binary value, and then sets a digital output parameter with the option for that same
binary value. For example, if a control state was output configured for a binary value of 11, then any
digital output configured to “SeqOut-11” would be activated during that time.
Sequencer Direction Selection
The sequencer allows each state to be configured as running Forward, Reverse, Stopped, or DC
Injected by setting bits 7 and 8 of the control parameters.
Sequencer State Duration
Bits 4, 5, and 6 of each sequencer control parameter specify how that step will allow advancement
to the next step. The options for advancement are time, pulse input, voltage threshold, current
threshold, or digital input comparison. After the advancement method is selected with these bits,
the threshold of advancement is determined by the state’s count parameter (see the next paragraph).
Sequencer State Advance Threshold (via Count Parameter)
The sequencer count parameters work in conjunction with the state duration configuration in the
control parameter to determine when to advance to the next state. The function of this parameter is
dependent on the state duration configuration as defined in Table 7-6 on page 79. The range of data
Table 7-5: Speed Selection Options
Binary Value
Definition (Resulting Speed)
000
Speed selection as in normal X4 operation, as defined by parameters 204 (Ref Select) and 201
(Input Mode).
001
Value of parameter Preset Speed 1(303)
010
Value of parameter Preset Speed 2(304)
011
Value of parameter Preset Speed 3(305)
100
Value of parameter Preset Speed 4(306)
101
Value of parameter Preset Speed 5(307)
110
Value of parameter Preset Speed 6(308)
111
Value of parameter Max Frequency (302)