Ethernet Signal Loss Detection; Ethernet Communication Check Time Interval; Ethernet Communication Network Number - Mitsubishi Electric A800-E Instruction Manual

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.
Pr.1431
Description
setting
0 (initial value) Detection disabled
1 Warning output
2 Warning and alarm output
3 Protective function (E.EHR)
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.
Example) When Pr.1432 = 0.1 to 999.8 s
Operation mode
Connected device
Inverter
Inverter
Connected device
Pr.1432
Communication
check counter
E.EHR
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.
Operation panel display/indicator
—
EHR
EHR
E.EHR
External Network
Check starts
OFF
(N) Operation via communication and its settings
LF signal output
No
No
Yes
Yes
Fault (E.EHR)
Time
ON
25
PARAMETER
2
GROUP
N