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IronHorse GSDA-DP-D DC Drives Accessory User Manual – 1st Ed. Rev. A – 11/11/2019
Parameter
Parameter Name
Description
29
Startup Lag Compensation
Somewhat analogous to a “Min. Speed” control on analog motor speed
controls, this sets a “minimum output” that is applied as soon as the Target
Speed is above Zero RPM. Careful use of this setting can help with “stiction”
(the tendency for motors to require a bit more “oomph” to “break free” when
starting from a dead stop). However, values that are too high will make the
motor “creep” or even be unable to attain a desired target speed. In Follower
Mode, this setting can also help the Follower start up in better “sync” with the
Leader.
Signal Input #1 Setup Parameters
30
Signal Input 1 (S1) (Main Pickup)
Display Reference
This is the number to be displayed when at the user-specified motor Reference
RPM. In Rate Mode, this value represents rate units such as feet, ounces, or
revolutions. In Time Mode, this value represents the reference time measured
in seconds or minutes. If the desired display is HH:MM, then all values should
be entered in minutes. If MM:SS is desired, then all values should be entered
in seconds. In Follower Mode, this value is the percentage of the master rate
in 0.1% units. For example, 1000 equates to 100%.
31
Signal Input 1 (S1) Reference RPM
This is the reference RPM at which the Display Reference value should be
displayed. In Rate and Time Modes, this value represents the RPM of the
encoder to which the Display Reference corresponds. In Follower Mode, this
value is not used.
32
Signal Input 1 (S1) Pulses per
Revolution
This is the number of pulses per revolution for the signal input 1 (S1). The
GSDA-DP-D supports pickups and encoders from 1 to 9999 pulses per
revolution.
33
Signal Input 1 (S1) Initial Stall
Timeout
When the Target Speed is above zero RPM, this Parameter determines the
maximum time in units of seconds that can elapse before the first S1 pickup
pulse before the GSDA-DP-D considers itself in a “Stall” Condition. It is not
advisable to set this lower than approximately 10 seconds (a value of 10), or it
may be difficult to achieve startup in a low-speed application. A value of zero
defeats this timeout. (Note: This parameter will only work if the alarm is set for
stall on any of the parameters 50, 51, 52, 70, 71, or 72.)
34
Signal Input 1 (S1) Running Stall
Timeout
When the Target Speed is above zero RPM, this Parameter determines the
maximum time in units of 0.1 Seconds that can elapse between S1 pickup
pulses before the GSDA-DP-D considers itself in a “Stall” Condition. It is not
advisable to set this lower than approximately 10 seconds (a value of 100),
or it may be difficult to achieve startup in a low-speed application. Also note
that the S1 Pulses Per Revolution (PPR) must be taken into account when
determining the proper setting for this timeout. A value of zero defeats this
timeout. (Note: This parameter will only work if the alarm is set for stall on any
of the parameters 50, 51, 52, 70, 71, or 72.)
