SUNFAR Self-Defined Communication Protocol 71
E500 Series Universal Low-Power Inverter
access sent by main machine, slave machine should feedback one message
(named as response); as for broadcast message sent by main machine, it’s not
necessary for slave machine to make any feed- back to main machine.
1. Communication setting
F4.00=X0XX, select SUNFAR custom communication protocol.
2. Data structure
Available in three types of data transmission formats:
(1) 1-bit start bit, 8-bit data bit, 1-bit stop bit, no check.
(2) 1-bit start bit, 8-bit data bit, 1-bit stop bit, even parity check (factory
settings).
(3) 1-bit start bit, 8-bit data bit, 1-bit stop bit, odd parity check.
3. Baud rate
Available in five types of Baud rates: 1200bps, 2400 bps, 4800 bps, 9600 bps,
19200 bps.
4. Communication mode
(1) Adopt point-to-point communication mode with main machine for polling
and slave machine for response.
(2)
Employ inverter keyboard to set up inverter serial interface communication
parameters, including local address, Baud rate and data format.
5. Communication rules
(1) More than 5 bytes of start interval time between data frames should be
guaranteed and only messages in compliance with the specified start interval
time is valid after being identified.
(2) The main machine connection waiting time and maximum response time
of inverter are 8 bytes transmission time; if timeout occurs, it will be determined
as communication fault.
The main machine must be preset with the same Baud
rate and data format with the inverter.
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