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9-13
Specifications
9
9-4-4
Communication Protocol
(1)
Serial communication specification
Physical level
Compliance with EIA RS-485 (2-wire type)
Number of connected
Host x 1 unit, inverter x 31 units (Station address 1 to 31)
stations
Transmission speed
19200, 9600, 4800, 2400, 1200[bit/s]
Synchronization method
Start-stop
Transmission method
Half duplex
Transmission protocol
Polling/selecting, broadcast
Character type
ASCII 7 bits
Character length
Selection between 7 and 8 bits
Transmission distance
Max. 500 m
Stop bit
Selection between 1 and 2 bits
Frame length
Standard frame: fixed to 16 bytes, short frame: 8 or 12 bytes
Parity
Selection from none, even and odd
Error check method
Checksum, parity, framing error
Table 9-4-3 Serial communication specification
(2)
Transmission protocol
It is the half duplex communication in the
polling/selecting method. The inverter always
waits for a write request (selecting) or a read
request (polling) from the host. The inverter,
when receiving in the wait state a request frame
to the own station from the host, returns a
response frame. Upon polling, it returns data
together. In the case of broadcasting (selection
of all stations in a batch), no response is
returned.
• Broadcast
• Polling/selecting
Response internal time+ (0~10ms)
10 msec or longer
Содержание VXSM150-1
Страница 3: ......
Страница 41: ...5 12 Selecting Functions 5 Frequency setting block diagram ...
Страница 45: ...5 16 Selecting Functions 5 Note The chain line indicates the motor speed ...
Страница 71: ...7 1 Troubleshooting 7 7 Troubleshooting 7 1 When Protective Function Activates 1 Overcurrent ...
Страница 72: ...Troubleshooting 7 2 7 2 Overvoltage 3 Undervoltage ...
Страница 77: ...7 7 Troubleshooting 7 3 The motor loses speed during acceleration 4 Excessive heat generation from motor ...