Command Configuration (I/O Config); Definition Of The Commands - GE AV-300i User Manual

1.5 COMMAND CONFIGURATION (I/O CONFIG)

1.5.1 Definition of the Commands

For starting, the drive always requires the Enable command, Start command and Fast stop when enabled.
The above different commands affect the drive rotation:
Enable - this command unlocks power converter firing. It is made of a terminal wired permissive
that affects firing hardware directly. In addition, this can be optionally ANDed with a
boolean input "Digital enable" from an external source (communication, application card).
Enable command can also be "gated" by the "En/Disable control function" as described
below. Enable unsuicides the drive regulators and current can circulate. See Diagram
Block chapter , "Commands - Enable logic".
Start/Stop - this command unlocks the reference to the regulation chain: Ramp, speed regulator or
torque regulator, depending on which is enabled. When the command is asserted (0 to 1
transition) it is said that the drive is being "started", when the command is negated (1 to
0 transition) it is said that the drive is being stopped".
The Command select parameter defines the use of Enable drive and start/stop of the drive. It may have different
source:
• Terminal: Enable and Start and Stop commands are active from programmable digital input terminals. En-
able has a dedicated input, Start is programmed as default as Term Str/Stp src (Start & Stop can also be
separate commands from PB inputs). If the command source id Digital or I O Keys, terminals are acting as
permissive inputs.
• Digital: The commands comes as boolean input "Digital Start/Stop" from a communication or application
card. (Terminals are acting as level sensitive permissive inputs)
• [I] and [O] keys on the keyboard/display module. (Terminals are acting as level sensitive permissive inputs)
Through "Terminal" and "Digital" can be select an "edge-sensitive" section, which is meant for manual control
from an operator, or automatic control from a PLC, and a "level-sensitive" section, which is meant for wired
control in an unmanned installation where automatic restart after power fault is desired.
For unmanned installations requiring the drive to restart after a power fault without any external sequencer logic,
the edge sensitive section may be bypassed by setting parameter Command select = "Terminal Level". See
Diagram Block chapter , "Commands - Start Stop logic".
N !
OTE
With Command select = "I O Keys", the [O] key on the keyboard/display module (if present)
can be used to stop the drive. In this case, to resume normal operation, the [I] key must be
pressed, alternatively power must be cycled in orded to clear the sequencer. The keyboard/
display module can be used as a monitor device with the different selection of Command
select parameter.
Fast stop - usage of this command is optional. This command is used when the drive is operated
with Ramp and speed regulation. When the command is active, the Ramp input refer-
ence is zeroed and the ramp operates on a specific deceleration slope that can be set
independently from the standard deceleration slope. The command can be accessed
either from a communication source or a programmable digital input terminal.
N !
OTE
when Fast stop command is negated, the drive will restart unless also Start/Stop command
has been negated. The exception is when En/Disable control parameter is programmed as
AV-300i Version 2 User's Guide
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