Fuji Electric TP-A1 - Communication Specifications; Transmission Specifications

4-2
4.2 Communication Specifications
Tables 4.2 and 4.3 summarize the communication specifications.
Table 4.2 Hardware Specifications
Item Specifications Remarks
No. of inverters
connected
One inverter for one multi-function keypad
Connection cable Shall meet the US ANSI/TIA/EIA-568A
Category 5 standard
(10BASE-T/100BASE-TX, straight).
The remote operation extension
cable is available as an option
(CB-5S, CB-3S, or CB-1S,
depending on the distance).
Maximum
communication
distance
20 m
Connector RJ-45 connector See Table 4.3.
Table 4.3 RJ-45 Connector Pin Assignment
Pin #
Signal
name
Description Remarks
1, 8 Vcc DC power source for the
multi-function keypad (5 V)
2, 7 GND Reference potential
3, 6 NC Unassigned (reserved)
4 DX - RS-485 communication data ( - )
5 DX + RS-485 communication data ( + )
FRENIC-HVAC/AQUA series: Turn off the terminating resistor switch SW3 at the RS-485
communications port of the inverter unit.
FRENIC-Ace series: Turn off the terminating resistor switch SW2 at the RS-485 communications port o
f
the inverter unit.
4.3 Transmission Specifications
Table 4.4 summarizes the transmission specifications.
Table 4.4 Transmission Specifications
Item Specifications Remarks
Area code No need to specify. There is no need to specify function
codes y01 through y10 for RS-485
communication, which will be
ignored anyway.
Communications
protocol
Modbus-RTU
Synchronization
system
Start-stop
Communication system Half-duplex
Communication speed
(Baud rate)
19200 bps
Parity Even parity
Stop bit length 1 bit
Error checking CRC-16
ENGLISH