Section 4. Configuration of the frequency converter
Start the engine drying process
When the drive is stopped and a signal is given in accordance with the setting of parameter
1.96 DC dry enable
, the
process of drying the motor windings will be started. The drying process will continue for the time specified in par.
1.99
DC dry time
or less if interrupted by one from the following:
• "start inverter" command,
• no signal that allows the drying process - par 1.96,
• operation lock, inverter failure.
PCH
PCH name
Function / value / note
67
Drying status
H = drying process is active
195
Time until the end
of drying process
Time remaining until the end of the drying process [in minutes] - equivalent to
par. 0.38
Drying process
activation - par. 1.96
Drying process is active
- rejestr 2007, bit 1
- PCH 67
yes
Time remaining until
the drying process is
completed
- par. 0.38
- PCH 195
par. 1.99
no
Enable
Disable
0
Fig. 4.21 – Motor drying process
Example 1
The start of the drying process is to be activated by digital input 1 (DI1) and should last for 1 hour.
Drying current limit: 20% In. Drying voltage limit: 5%.
The following parameters must be set:
par. 1.96 = 001 We.C1 (DI1),
par. 1.97 = 20.0%,
par. 1.98 = 5.0%,
par. 1.99 = 1.0 h.
Example 2
The start of the drying process is to be activated by digital input 1 (DI1) and should last until the signal changes on this
input.
Drying current limit: 20% In. Drying voltage limit: 5%.
The following parameters must be set:
par. 1.96 = 001 We.C1 (DI1),
par. 1.97 = 20.0%,
par. 1.98 = 5.0%,
par. 1.99 = 200.0 h.
Note:
Using the motor drying function without monitoring the temperature of the motor windings may overheat these
windings and damage the motor.
Frequency converter MFC710 type. TWERD Power Electronics
43
