Monobloc Outdoor Unit Service Manual
123
11. JBus / ModBus details
11.1.
JBus / ModBus controller
As standard the Toshiba Monobloc outdoor units are supplied with a JBus / ModBus controller. The
controller provides a secondary port to be connected to a system network thanks to an RS485 bus. The
controller has the ability to communicate without an amplifier. The length of the bus does not exceed 500m.
Description
Line Spec.
Maximum
Length (m)
Connection Destination
RS-485
connection
2 wire
shielded
500m
NHC PCB
J10
Pin 1
A
+RS485
Pin 2
GND
GND
Pin 3
B
-RS485
Connect the RS-485 network cable to J10 on the Monobloc outdoor unit NHC PCB, using the connector
supplied with the unit.
The following parameters have to be set to configure the JBus / ModBus communication:
1. P761: JBus control enable
2. P762: JBus address
3.
P646: JBus baud rate
4.
P764: JBus frame type
5. P766: JBus communication timeout
11.2.
JBus / Modbus Parameter list
Par.
Description
Min
Max
Default
Unit
Jbus
Modbus
001
Outdoor Air Temperature
-40.0
115.6
RO
0001H
RO
4000H
002
Indoor Air Temperature
-40.0
115.6
RO
0002H
RO
4001H
003
Entering Water Temperature
-40.0
115.6
1/10°C
RO
0003H
RO
4002H
004
Leaving Water Temperature
-40.0
115.6
1/10°C
RO
0004H
RO
4003H
005
Refrigerant Temperature
-40.0
115.6
1/10°C
RO
0005H
RO
4004H
007
Room Temperature
-40.0
115.6
1/10°C
RO
0007H
RO
4006H
008
Saturated Suction Temp
1/10°C
RO
0008H
RO
4007H
009
Suction Temperature
1/10°C
RO
0009H
RO
4008H
010
Discharge Temperature
1/10°C
RO
000AH
RO
4009H
011
Lower Air Exchanger Temp
1/10°C
RO
000BH
RO
400AH
012
Upper Air Exchanger Temp
1/10°C
RO
000CH
RO
400BH
013
Inv. Outdoor Air Temp
1/10°C
RO
000DH
RO
400CH
014
Heatsink Temperature
1/10°C
RO
000EH
RO
400DH
015
Superheat Temperature
1/10 K
RO
000FH
RO
400EH
016
Superheat Target Temp
1/10 K
RO
0010H
RO
400FH
017
Inverter DC High Voltage
V
RO
0011H
RO
4010H
018
HV Bus Comm. Status
0
1
-
RO
0012H
RO
4011H
019
Inverter Current Mode
0
22
-
RO
0013H
RO
4012H
020
Actual Min Compr. Freq
1/10 Hz
RO
0014H
RO
4013H
021
Actual Max Compr. Freq
1/10 Hz
RO
0015H
RO
4014H
RS-485 Network
J10
3
2
1
Содержание Estia RUA-CP1701H
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