Communication Time-Out Detection (F803) (F804) (F808) - Toshiba Tosvert VF-S15 Series Instruction Manual

7.3. 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 () or issue
an alarm (). With the communication time-out action parameter (), you can specify what
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
0.1 sec. (01H) to 100.0 sec. (3E8H) / Timer off is 0.0 sec.
 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 deceleration stop.
 Time-out detection condition
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 detects time-out error.
When it is set to 2, it detects time-out error during communication-mode and running.
 How to disable the timer
Set 0.0 (Disabled) to the parameter (f803).
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
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
Inverter  Computer
(W08030000)
CR
Time-out period
INV  PC
50
... Sets the timer parameter to 0 to disable it.
CR
PC  INV
The timer
elapsed before the inverter ac-
knowledges receipt of data after it
acknowledged receipt of the previ-
ous data.
E6581913
measures the time