User`s guide

127
CHAPTER 6 - DETAILED PARAMETER DESCRIPTION
Range
[Factory Setting]
Parameter
Unit
Description / Notes
Figure 6.26
- Ride-Through actuation
P311
t < 2s
t
disabled
>t
dead
time
Enabled
Disabled
DC Link Voltage
Undervoltage Level
(E02)
PWM pulses
Output Voltage
0 V
Output Frequency
(Motor Speed)
0 Hz
It sets the type of the protocol for the serial
communication.
The serial interface can be configured for two distinct
protocols: WEG and Modbus-RTU.
The WEG protocol is described in item 8.24 and is
selected by setting P312 = 0.
The Modbus-RTU protocol, described in item 8.25 has
nine predefined formats, as shown in table below:
P312
1
2
3
4
5
6
7
8
9
Rate (bps)
9600
9600
9600
19200
19200
19200
38400
38400
38400
Parity
-
Odd
Even
-
Odd
Even
-
Odd
Even
P312
(3)
0 to 9
Serial Interface
[0
- WEG ]
Protocol
1
Table 6.28
- P312 configuration for Modbus-RTU protocol formats
It determines the type of action performed by the
Watchdog.
If the inverter does not receive any valid message (via
serial interface) duringthe interval programmedat P314,
the action set at P313 will be performed and error E28
is shown on the display.
The different actions are:
P313
0 to 3
Serial Interface
[ 2 ]
WatchdogAction
1
Table 6.29
-
Configuration of P313 to Watchdog actions
Action
Disables inverter via deceleration ramp
Triggers the general disable command of the
inverter
Indicates only E28
Changes the command reference to local mode
P313
0
1
2
3