Communication Time-Out Detection (F803) (F804) (F808); Free Notes(F880) - Toshiba TOSVERT VF-nC3 Instruction Manual
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6.3. Communication time-out detection (f803) (f804) (f808)
The timer function is mainly used to detect a break in a cable during communication, and if no data
is sent to an inverter within the preset time, this function makes the inverter trip (
an alarm ( ). With the communication time-out action parameter (
the inverter should do (trip, issue an alarm or do nothing) if a time-out occurs.
How to set the timer
By default, the communication time-out time parameter (f803) is set to 0.0 (Disabled).
* Timer adjustment range
About 0.1 sec. (01H) to about 100.0 sec. (3E8H) / Timer off (0H)
How to start the timer
If the timer is set from the operation panel, it will start automatically the instant when communication
is established for the first time after the setting.
If the timer is set from the computer, it will start automatically the instant when communication is
established after the setting.
If the timer setting is stored in the EEPROM, the timer will start when communication is established
for the first time after the power has been turned on.
Note that, if the inverter number does not match or if a format error occurs, preventing the inverter
from returning data, the timer function will assume that no communication has taken place and will
not start.
How to specify what an inverter should do if a time-out occurs
By default, the communication time-out action parameter (f804) is set to 0 (Alarm only). The
data of 1 is trip (err5) and coast stop. The data of 2 is trip (err5) after slowdown stop.
Time-out detection
By default, the communication Time-out detection (f808) is set to 1 (When communication
-mode is selected).
When it is set to 0, It always detect time-out error.
When it is set to 2, It detect time-out error during communication-mode and running.
How to disable the timer
To disable the timer, set its parameter(f803) to 0.0(Disabled).
Ex.: To disable the timer function from the computer (To store the timer setting in the EEPROM)
Computer → Inverter
(W08030)
Timer
PC → INV
Computer link
6.4. Free notes(f880)
This parameter allows you to write any data, e.g., the serial number of each inverter or parameter
information, which does not affect the operation of the inverter.
Inverter → Computer
(W08030000)
CR
Time-out period
PC → INV
INV → PC
42
... Sets the timer parameter to 0 to disable it.
CR
The
timer
elapsed before the inverter ac-
knowledges receipt of data after it
acknowledged receipt of the previ-
ous data.
E6581657
) or issue
), you can specify what
measures
the
time
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