890053-03-01
890053-
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Description of Keypad Parameters
9.5 PRT Group (Lost Command)
①
[PRT-12] Lost Cmd Mode
When controlling the inverter speed through communications, you can select
the inverter response (operating mode) when a network failure occurs
(including a connection failure between the inverter and communication).
Choices for PRT-12 include Decel, Hold Input, Hold Output or Preset
Frequency (PRT-14).
②
[PRT-13] Lost Cmd Time
Set the delay time for the inverter to respond to a speed reference loss. The
inverter will operate based on the PRT-12 setting after the delay time set in
PRT-13. Delay time can be set between "0.1" and "120" seconds.
③
[PRT-14] Lost Preset Frequency
When the lost command mode (PRT-12) is set to Preset Frequency, set the
operating speed for continued inverter operation. The Preset Frequency can
be set between the start frequency and the max frequency [Hz].
④
Lost command conditions by protocol
- EtherNet/IP
If the implicit message connection (Class 1 Connection) between the originator
(a PLC or client) and the target (inverter) breaks for longer than one second,
the EtherNet communication board enters lost command mode and the
inverter will operate according to the settings at PRT-12 after the time set with
PRT-13 has elapsed.
- Modbus TCP
If the Modbus TCP receives no data from the client for five seconds, the
EtherNet communication board enters lost command mode and the inverter
will operate according to the settings at PRT-12 after the time set with PRT-13
has elapsed.
