1-2
IM 77C01H01-10EN
1.2 Notes on Setting RS-485 Communication Conditions
This section describes the setting parameters for using the communication functions
and their setting ranges.
Note
The details of the UPM100 communication conditions need to be the same as those of the
communication conditions of the higher-level device to be connected.
• UPM100 without display function (UPM100-xx0xx-20 or UPM100-xx2xx-20): Set up
the communication conditions using the front DIP switches. (See the user’s manual of Model
UPM100 Universal Power Monitor <Initial Setup Operations>.)
• UPM100 with display function (UPM100-xx1xx-20 or UPM100-xx3xx-20): Set up
the communication parameters using the front panel keys. (See the user’s manual of Model
UPM100 Universal Power Monitor <Initial Setup Operations>.)
Table 1-1 Parameters to be Set for Communication Functions
Parameter
Name
Parameter
Symbol
Setting Range
Initial Setting
Without 920
MHz Wireless
Communication
With 920 MHz
Wireless
Communication
RS-485
communication
protocol
(COMM)
PC link without checksum PCLK1
PCLK2
M RTU
3
PC link with checksum
PCLK2
MODBUS (ASCII mode)
M ASC
MODBUS (RTU mode)
M RTU
UPM01
UPM01
2
RS-485
station number (ST-NO)
1 to 99 (1 to 31 recommended)
1
1
RS-485
communication
baud rate
(B-RT)
2400 bps
9600
19200
3
9600 bps
19200 bps
Parity
(PRI)
None
NONE
NONE
NONE
3
Even
EVEN
Odd
ODD
Stop bit
(STP)
1
1
1
3
2
Data length
1
(DLN)
7
8
8
3
8
1: When “MODBUS (ASCII mode)” is selected in protocol selection, select “7” or “8” for the data
length. When “MODBUS (RTU mode)” is selected, select “8.” Otherwise, communication cannot
be achieved.
2: The UPM01 communication is selectable only when the optional measuring function “Integral
resolution Wh” is specified at ordering.
3: When using 920 MHz Wireless Communication, please use the default value above.
Note: 920 MHz wireless communication can be used only in the Republic of Korea.
Содержание UPM100
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