Filter
Top Products
249
Communication operation and setting
4
PARAMETERS
(2) BACnet reception status monitor (Pr.52)
Set Pr. 52 = "81" to monitor BACnet communication status on the operation panel (FR-DU07) and parameter unit (FR-
PU04/FR-PU07).
(3) % setting reference frequency (Pr. 390)
Setting of a reference frequency to the set frequency is available.
The setting value of Pr. 3
90 % setting reference frequency is 100% reference. The reference to the frequency command is
converted to the set frequency in the following formula.
• Set frequency = Pr. 3
90 % setting reference frequency × Speed scale (Refer to page 252)
(4) Automatic baud rate recognition (Pr. 726 Auto Baudrate/Max Master)
Automatic changing of baud rate is available with Pr. 726 setting. When Pr. 726 = "128 to 255", turn the power ON from
OFF or reset the inverter to start automatic baud rate recognition.
Status Data Description LF signal
Idle 0 Never had BACnet communication OFF
Automatic baud rate
recognition
1
During automatic baud rate recognition
(Communication error during automatic baud rate recognition is not counted)
OFF
Not joined the network 2 Waiting for a token to the own node OFF
Data to the own node
10 Received a token to the own node OFF
11 Received a supported request to the own node (including broadcasting) OFF
12 Received an unsupported request to the own node (including broadcasting) OFF
Data to the other node 20 Received a token to other nodes OFF
Node separated 30 Separated from token passing after joined in it OFF
Error data
90 Detected a communication error ON
91
Protocol error (LPDU, NPDU, APDU are not following the format
regulations.)
ON
REMARKS
• The % setting reference frequency cannot be set at less than the minimum frequency resolution of the inverter.
• The set frequency is written to RAM.
• The set frequency is applied at the writing of Speed scale. (The set frequency is not applied at the setting of Pr. 390.)
Pr. 726 setting Description
0 to 127
Automatic baud rate recognition is invalid
(Using Pr. 332 setting for baud rate)
128 to 255
Inverter monitors the data on the communication bus, and changes the baud rate from Pr. 332
setting. The recognized baud rate is written to Pr. 332.
REMARKS
• After the baud rate recognition, the recognised baud rate is written in EEPROM of Pr. 332 regardless of Pr. 342 Communication
EEPROM write selection setting.
• BACnet status monitor displays "1" during automatic baud rate recognition.
• Communication error count monitor is not performed during automatic baud rate recognition.
CAUTION
• During automatic baud rate recognition, inverter does not transmit data, but only accepts data.
• Automatic baud rate recognition cannot finish if inverter is not connected to the communication bus. (BACnet protocol will not
be established.)
• Automatic baud rate recognition cannot finish if inverter is receiving abnormal data continuously. (BACnet protocol will not be
established.)
0.00Hz
0%
100.00%
Set frequency written to the inverter
Pr. 390 % setting reference frequency
Set frequency (Speed scale)