(N) Operation via communication and its settings
25
2
GROUP
N
Ethernet signal loss detection (Pr.1431)
Use
Pr.1431
to set the operation when Ethernet communication is interrupted by physical factors including disconnection of
the Ethernet board or Ethernet cable or damages on the Ethernet cable.
Ethernet communication check time interval (Pr.1432)
• If a signal loss (communication stop) is detected between the inverter and all the devices with IP addresses in the range for
Ethernet command source selection (
Pr.1449 to Pr.1454
) as a result of a signal loss detection, a communication error
(E.EHR) occurs and the inverter trips.
• When "9999 (initial value)" is set in
Pr.1432
, the communication check (signal loss detection) will not be performed.
• The monitored items and parameter settings can be read via Ethernet when "0" is set in
Pr.1432
, but a communication error
(E.EHR) occurs instantly when the operation mode is switched to the Network operation.
• A signal loss detection is made when any of 0.1 s to 999.8 s is set in
Pr.1432
. In order to enable the signal loss detection,
data must be sent by connected devices at an interval equal to or less than the time set for the communication check. (The
inverter makes a communication check (clearing of communication check counter) regardless of the station number setting
of the data sent from the master.)
• Communication check is started at the first communication when the inverter operates in the Network operation mode and
the command source is specified as communication via the Ethernet connector.
Ethernet communication network number (Pr.1424), Ethernet
communication station number (Pr.1425)
• When the MELSOFT / FA product connection, SLMP, or iQSS is selected for Ethernet communication, enter the Ethernet
communication network number in
Pr.1424
and the Ethernet communication station number in
Pr.1425
.
Pr.1431
setting
Description
Operation panel display/indicator
LF signal output
0 (initial value)
Detection disabled
—
No
1
Warning output
EHR
No
2
Warning and alarm output
EHR
Yes
3
Protective function (E.EHR)
E.EHR
Yes
Connected device
Connected device
Operation mode
Example) When
Pr.1432
= 0.1 to 999.8 s
External
Network
Fault (E.EHR)
Time
Inverter
Inverter
Communication
check counter
Pr.1432
Check starts
E.EHR
OFF
ON
