Messages; Communications Specifications; Polling/Selecting - Fuji Electric FRENIC-AQUA series User Manual

6.1

Messages

6.1.1

Communications specifications

Item
Physical level
Wiring distance
Number of nodes
Transmission speed
Transmission mode
Bus topology
Character code
Character length
Stop bit
Frame length
Parity
Error checking
6.1.2

Polling/selecting

When the FRENIC-HVAC/AQUA receives a request frame from the host, it sends back a
response frame.
Polling/ Selecting
Host
Inverter
Specifications
EIA RS-485
1640 ft (500 m) max.
Total of 255
9600 bits/s (fixed)
Half duplex
Master-Slave
ASCII 7 bits (fixed)
8 bits (fixed)
1 bit (fixed)
Variable length
None (fixed)
Checksum
Request frame
6-1
6.1 Messages
Response frame
10 ms max.