Delta DVP-SX2 - Page 97

2. Programming Concepts
2-61
Function Group COM Port Function
Number
Port
Item
COM1 COM2 COM3
Communication format
D1036
D1120
D1109
Communication setting holding
M1138
M1120
M1136
ASCII/RTU mode
M1139
M1143
M1320
Slave communication address
D1121
D1255
Contents:
COM ports (COM1: RS-232, COM2: RS-485, COM3: RS-485) support communication format of
MODBUS ASCII/RTU modes. When RTU format is selected, the data length should be set as 8.
COM2 and COM3 support transmission speed up to 921kbps. COM1, COM2 and COM3 can be
used at the same time.
COM1:
Can be used in master or slave mode. Supports ASCII/RTU communication format, baudrate
(115200bps max), and modification on data length (data bits, parity bits, stop bits). D1036: COM1
(RS-232) communication protocol of master/slave PLC. (b8 - b15 are not used) Please refer to
table below for setting.
COM2:
Can be used in master or slave mode. Supports ASCII/RTU communication format, baudrate
(921kbps max), and modification on data length (data bits, parity bits, stop bits). D1120: COM2
(RS-485) communication protocol of master/slave PLC. Please refer to table below for setting.
Note: 600 bps is not available for ES2-C: V4.0 or later; 921kbps is not available for SE: V1.xx;
921kbps is available for SE: V2.00 or later.
COM3:
Can be used in master or slave mode. Supports ASCII/RTU communication format, baudrate
(921kbps max), and modification on data length (data bits, parity bits, stop bits). D1109: COM3
(RS-485) communication protocol of master/slave PLC. (b8 - b15 are not used) Please refer to
table below for setting.
Note: ES2-C does NOT come with COM3; 921kbps is not available for SE: V1.xx; 921kbps is
available for SE: V2.00 or later.
Content
b0 Data Length
0: 7 data bits, 1: 8 data bits
(RTU supports 8 data bits only)
b1
b2
Parity bit
00: None
01: Odd
11: Even
b3
Stop bits
0: 1 bit, 1: 2bits
b4
b5
b6
b7
Baud rate
0100(H4):
600
0101(H5):
1200
0110(H6):
2400
0111(H7):
4800
1000(H8):
9600
1001(H9):
19200
1010(HA):
38400
1011(HB):
57600
1100(HC):
115200
1101(HD):
500000 (COM2 / COM3)
1110(HE):
31250 (COM2 / COM3)
1111(HF):
921000 (COM2 / COM3)
b8
Select start bit
0: None
1: D1124