249
Communication operation and setting
4
(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
(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)
Содержание 700 Series
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