Rockwell Automation 1336T FORCE Series B User Manual
Page 224
Chapter 6
Troubleshooting
6–12
Using Precharge / Ridethrough Selection to Change
Precharge/Ridethrough Options
You can use Precharge / Ridethrough Selection (parameter 223) to
change how precharge and ridethrough work. Precharge / Ridethrough
Selection is a bit encoded word that disables the following functions
when the appropriate bit is set (1):
This
bit:
Has this definition:
0
Sets the bus voltage tracker slew rate to 10 volts/second.
1
Sets the bus voltage tracker slew rate to 5 volts/second.
2
Sets the bus voltage tracker slew rate to 0.5 volts/second.
3
Sets the bus voltage tracker slew rate to 0.05 volts/second.
4
Sets the bus voltage tracker slew rate to 0.005 volts/second.
5
Reserved. Leave zero.
6
Reserved. Leave zero
7
Setting this bit selects the slave drive of a Master–Slave
combination to use the master drive analog frequency reference
in place of the slave encoder input.
8
Enables fast flux up. This is covered in more detail later in this
chapter.
9
Reserved, Leave zero.
10
Reserved, Leave zero.
11
Forces an exit from precharge after the precharge timeout.
12
Identifies the drive as a common bus converter.
13
Disables faults or warnings while the drive is disabled. This
allows power up and down the bus for a common bus system
without faulting even if the faults or warnings are enabled. For
example, faults or warnings only occur if the drive is running.
This may be desirable when external power supplies are used.
14
Disables the precharge function after initial power up. Any bus
drop or undervoltage will not result in precharge. This may
destroy the drive if power returns to the system. This should be
used where you control the input impedance or with a front end
converter that is current limited.
15
Disables the ridethrough and precharge functions. If the power
lines drop out, the drive attempts to continue operation as long
as any power is available. This may destroy the drive if power
returns to the system. This should be used only where you
control the system’s incoming power.