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Network Communication
start of deceleration, and
when the load changes
abruptly.
The speed accuracy is poor
1. The motor has large
electromagnetic noise.
2. Misalignment and vibration
occur at low speed (below 10
Hz)
After checking the above items, please check the following items:
Check
NO.
Content
16
Does the keyboard and keyboard display normally when I start running?
17
When entering the run command and frequency command from the keyboard, do you press F01.01=0 (keyboard control), F01.02=0?
When the motor rotates in the wrong direction during the trial run, have you tried to exchange any two of the drive output terminals
18
U, V, W?
Is F02.06 (rated motor current) and F10.30 (motor overload protection curve factor) set correctly to ensure correct operation of motor
19
overload protection?
20
When the operation command and frequency command are input from the control circuit terminal, has F01.01=0, F01.02=0?
When inputting a frequency command from the analog input terminal AI
• Voltage input
– Is it confirmed that the external switch of the drive places the AI on the U side?
21
– Is F01.02 = 2 [terminal AI1 function selection = main speed frequency command] set?
• Current input
– Is the internal switch of the drive confirmed to place the AI at the I terminal?
– Is F01.02 = 2 [terminal AI1 function selection = main speed frequency command] set?
Did you confirm that the frequency command reached the required minimum/maximum value?
→ When the desired value is not reached, check the following items.
Gain adjustment: Set the maximum voltage/current value and adjust the analog input gain before the frequency command reaches
22
the desired value. (Frequency reference channel A gain F01.03; frequency reference channel B gain F01.05)
Offset adjustment: Set the maximum voltage/current value and adjust the analog input offset until the frequency command reaches
the desired minimum value. (When terminal AI1 is input: F05.50~F05.53, when terminal AI2 is input: F05.55~F05.58)
5
Network Communication
5.1 Safety Precautions
Please pay attention to all the information about safety in this book.
Failure to follow the warning may result in death or serious injury. The company will not be held liable for any damage or equipment damage caused by
your company or your company's customers who fail to comply with the warnings in this book.
5.2 MODBUS Communication
NOTES
Parameter [F11.30] sets the MODBUS/external keyboard to choose one. This parameter is not restored with the [F00.03] parameter. Users are strongly
advised to unlock the hardware connection of another channel when using one of them.
The AC10 series drives are equipped with RS485 communication interface and the master-slave communication using the international standard Modbus
communication protocol. The user can realize centralized control through PC / PLC, host computer, main station drive, etc. (set drive control command,
running frequency, modification of related function code parameters, drive working status and fault information monitoring, etc.) to adapt Specific application
requirements.
5.2.1 Host/Slave Configuration
The communication between the master and the slave (serial communication) is usually performed by the host starting communication and the slave
responding. The host pre-sets the address number for each slave and specifies the number for signal communication. The slave that receives the host
instruction performs the function specified by the host and responds to the host.
5.2.2 Communication rules
The MODBUS communication format is shown in the table below:
Project
Interface
Synchronous method
AC10 Series Frequency Inverter Technical Manual
F03.23[Asynchronous machine
slip compensation gain]
F01.40
[carrier
frequency
selection]
Description
RS-485 (RS232 interface requires an additional RS232/RS485
converter)
asynchronous
value by 4ms.
•
When
the
response
is
responsiveness is confirmed, and the set value
is gradually lowered by 2 ms.
• When the speed is slow, gradually increase the
set value by 10%.
• When the speed is fast, gradually lower the set
value by 10%.
• Increase the carrier frequency when the motor
electromagnetic noise is high.
• If there is an offset or vibration at low speed or
medium speed, lower the carrier frequency.
32
slow,
the
100%
0～250%
1.0kHz
1.0～upper limit
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