2 Functions of Devices in DVP-PLC
DVP-PLC Application Manual
2-78
COM2: For master or slave stations. Supports ASCII/RTU communication format, adjustable baud rate
with speed of up to 115,200bps, and modification on data length (data bits, parity bits, stop bits).
COM3: For slave stations only. Supports ASCII communication format (data bits, parity bits, stop bits) 7, E,
1, adjustable baud rate with speed of up to 38,400bps. COM2 or COM3 cannot be used for slave
stations at the same time.
Communication Format Settings:
COM1: 1. Communication format is set in D1036. b8 ~ b15 do not support the communication protocol of
COM1 (RS-232) Slave
2. Communication setting in M1138 remains
3. M1139 is set in ASCII/RTU mode
COM2: 1. Communication format is set in D1120. Communication protocol of COM2
(RS-232/RS-485/RS-422) Master or Slave
2. Communication setting in M1120 remains
3. M1143 is set in ASCII/RTU mode
COM3: 1. Communication format is set in D1109. b0 ~ b3 and b8 ~ b15 do not support the
communication protocol of COM3 (RS-232/RS-485) Slave
2. Communication setting in M1136 remains
Communication protocols and how to set:
Content 0 1
b0 Data length b0 = 0:7 b0 = 1:8
b2, b1 = 00 : None
b2, b1 = 01 : Odd
b1
b2
parity bit
b2, b1 = 11 : Even
b3 stop bits b3 = 0:1 bit b3 = 1:2 bit
b7 ~ b4 = 0001 (H1)
:
110 bps
b7 ~ b4 = 0010 (H2)
:
150 bps
b7 ~ b4 = 0011 (H3)
:
300 bps
b7 ~ b4 = 0100 (H4)
:
600 bps
b7 ~ b4 = 0101 (H5)
:
1,200 bps
b7 ~ b4 = 0110 (H6)
:
2,400 bps
b7 ~ b4 = 0111 (H7)
:
4,800 bps
b7 ~ b4 = 1000 (H8)
:
9,600 bps
b7 ~ b4 = 1001 (H9)
:
19,200 bps
b7 ~ b4 = 1010 (HA)
:
38,400 bps
b7 ~ b4 = 1011 (HB)
:
57,600 bps
b7 ~ b4
b7 ~ b4 = 1100 (HC)
:
115,200 bps
b8 Select start bit b8 = 0:None b8 = 1:D1124
b9 Select the 1
st
end bit b9 = 0:None b9 = 1:D1125
b10 Select the 2
nd
end bit b10 = 0:None b10 = 1:D1126
b15 ~ b11 Not defined
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