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9 Communication9.2.2 Setting Communication Protocols
3) Serial port communication format
Comparison table of protocol and communication format
Protocol Baud Rate Data Bit Check Bit Stop Bit
HMI monitoring
protocol
9600 7 Even parity check (E) 1
Modbus-RTU Slave
Station
Serial port 0 is checked
through D8110, and serial
port 1 is checked through
bits 4 to 7 of D8120.
0011b: 300 bits/s
0100b: 600 bits/s
0101b: 1200 bits/s
0110b: 2400 bits/s
0111b: 4800 bits/s
1000b: 9600 bits/s
1001b: 19200 bits/s
1010b: 38400 bits/s
1011b: 57600 bits/s
1100b: 115200 bits/s
Serial port 0 is
checked through
D8110, and serial port
1 is checked through
bit 0 of D8120.
0b: 7 bits
1b: 8 bits
Note:
Modbus-RTU slave
and master station
protocols support only
8-bit data; otherwise,
communication errors
will occur.
Serial port 0 is
checked through
D8110, and serial port
1 is checked through
bits 1 to 2 of D8120.
00b: No parity check
(N)
01b: Odd parity check
(O)
11b: Even parity check
(E)
Serial port 0
is checked
through
D8110, and
serial port 1
is checked
through bit 3
of D8120.
0: 1 bit
1: 2 bits
Modbus-ASC Slave
Station
Free RS protocol
Modbus-RTU master
station
Modbus-ASC master
station
Modbus conguration
4) List of soft elements in serial port communication format
● COM0
M8110 Reserved D8110 Communication format
M8111 Reserved D8111 Communication station number
M8112
Modbus -
communication
execution state
D8112
Downloading and HMI monitoring
protocols - communication format
M8113
Modbus -
communication error
ag
D8113 Reserved
M8114 Reserved D8114 Reserved
M8115 Reserved D8115 Reserved
M8116 Reserved D8116 Communication protocol
M8117 Reserved D8117 Reserved
M8118 Reserved D8118
Modbus -
number of station with
communication errors
M8119 Timeout criterion D8119 Communication timeout period
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