TOSHIBA
9 - 6
9.3
COMMUNICATION GROUP PARAMETERS (cont'd)
POWER FAILURE FUNCTION SELECTION (ITEM 3) - When this function is selected,
the inverter will use the regenerative energy of a running motor to extend the power off
ride through capability during momentary power dropouts (approximately 100mS). There
are some cases when continuous operation is not possible due to the machine's inertia
or load status, so this feature should be used in combination with the retry function.
This function is non-operable on the P2 drives.
FAULT TRIP DATA RETENTION SELECTION (ITEM 4) - This function can be set to
store trip data in the EEPROM. The trip status data stored in this manner is available for
observation while occurring or anytime after the drive has tripped. If the trip data is stored
in this manner then the drive can only be started by manually resetting the drive
[:typ]=3. See Tripped Status Monitoring Page 8-3.
INPUT TERMINAL SELECTION (ITEM 5) - Use this parameter to configure the inverter
to recognize functional combinations of terminal inputs SS2, SS3, JOG, and AD2. See
Input Terminal Operation Chart on page 10-1. This chart shows all of the combinations
and the way that operating frequency can be selected by shorts or opens across these
terminal inputs.
OUTPUT TERMINAL SELECTION (ITEM 6) - Use this parameter to configure the
inverter for output functional combinations of terminals LL, UL, LOW, and RCH. See
Output Terminal Operation Chart on page 11-1. This chart shows output configurations
that can be assigned to these terminals.
OPTION CARD MULTI-FUNCTIONAL SELECTIONS (ITEM 7) - Use this function to
select various configurations for the optional "Multi-function Printed Circuit Board".
This is used only when the "Multi-Functional Option Board" is installed.
INVERTER NUMBER (ITEM 8) - Use this function to select a number between 0 and 31
to assign the inverter. This will electronically "tag" the inverter when operating on a serial
bus with other inverters.
This is used only when the "Multi-Functional Option
Board" is installed.
BAUD RATE (ITEM 9) - Use this function to select the serial communication bit transfer
rate.
This is used only when the "Multi-Functional Option Board" is installed.
COMMUNICATION DATA BITS (ITEM 10) - Use this function to select the serial
communication bit word length in the communication protocol.
This is used only when
the "Multi-Functional Option Board" is installed.
COMMUNICATION PARITY CHECK AND STOP BIT (ITEM 11) - Use this function to
select the serial communication protocol.
This is used only when the "Multi-
Functional Option Board" is installed.
PWM CARRIER FREQUENCY (ITEM 12) - Use this function to select the pulse width
modulated carrier frequency. The acoustic noise of the motor changes when the PWM
carrier frequency is changed. Changing the carrier frequency is usually effective in
quieting the mechanical vibration noise caused when a resonance occurs at the load
machine fan cover. Other system characteristics are also affected by the carrier
frequency. Higher carrier frequencies cause additional heating of the inverter because of
faster transistor switching speeds.
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