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HRX-OM-S010
Chapter 1 Read before using
HRS100/150 Series
1.1
Communication mode and operation method
1-5
1.1 Communication mode and operation method
LOCAL, DIO and SERIAL are available as the communication modes. Table
1.1-1 explains the communication modes. The default setting is LOCAL.
The operation method depends on the communication mode. Table 1.1-2 shows
how the communication mode and method of operation are related.
The operation of the product functions depends on the communication mode.
Table 1.1-3 shows how the communication mode and functions of this product
are related.
Table 1.1-1
Communication modes
Communication mode
Explanation
LOCAL
Mode allowing the product to be operated by the operation panel.
DIO
Mode allowing the product to be operated by the contact input/output communication.
When the communication mode is “DIO”, operation mode automatically becomes “DIO
REMOTE”.
"DIO REMOTE” and “DIO LOCAL” can be selected by DIO communication signal.
DIO REMOTE
:
Contact input/output communication takes control of the operation
of the product.
The [REMOTE] lamp on the operation panel turns on.
DIO LOCAL
:
Operation control of the product is the same as that of LOCAL.
The [REMOTE] lamp on the operation panel turns off.
SERIAL
Mode allowing the product to be operated by serial communication. MODBUS/ simple
communication protocol can be selected.
Table 1.1-2
Communication mode and operation
LOCAL
DIO
SERIAL
DIO
LOCAL
DIO
REMOTE
MODBUS
Simple
communication
protocol pattern
1
2
Run/Stop control with operation display
panel
○
○
x
x
○
x
Circulating fluid discharge temperature
setting control with operation display panel
○
○
○
x
x
Except above with operation display panel
○
○
○
○
○
Condition reading with operation display
panel
○
○
○
○
○
Run/Stop operation by contact input/output
communication
x
x
○
x
x
○
Condition reading by contact input/output
communication
○
○
○
○
○
Reading of the external switch
○
○
*1
○
*1
○
○
○
*1
Run/Stop
operation
by
serial
communication.
x
x
x
○
x
Circulating fluid discharge temperature
setting control by serial communication.
x
x
x
○
○
Condition reading by serial communication.
○
○
○
○
○
1:
Only one external switch can be installed.
Table 1.1-3
Communication mode and product functions
LOCAL
DIO
SERIAL
DIO
LOCAL
DIO
REMOTE
MODBUS
Simple
communication
protocol pattern
1
2
Run timer
○
○
x
x
○
x
Stop timer
○
○
x
x
○
x
Recovery from power cut
○
○
x
x
○
x
Anti-freezing
○
○
○
○
○
○
Pump accumulated operating time reset
○
○
x
x
○
x
Warming up function
○
○
○
○
○
○
Snow coverage protect function
*2
○
○
○
○
○
○
2: This function cannot be set on the products of the cooling method
‘-W’.