2 Hardware Specifications and Wiring
DVP-20PM Application Manual
2-19
2.3 Communication Ports
A DVP-20PM series motion controller is equipped with COM1 (RS-232 port), COM2 (RS-485 port), and a
communication card (COM3 (RS-232 or RS-485 communication)).
COM1: It is an RS-232 port. It can function as a slave station. A program is edited through this port. COM1
can be used in a Modbus ASCII mode or an RTU mode.
COM2: It is an RS-485 port. It can function as a master station or a slave station. It can be used in a
Modbus ASCII mode or an RTU mode.
COM3: It is an RS-232/RS-485 port. It can function as a slave station. It can be used in a Modbus ASCII
mode.
Communication architecture:
Communication port
Communication parameter
RS-232 port
(COM1)
RS-485 port
(COM2)
RS-232/RS-485 port
(COM3)
Serial transmission rate
110~115,200 bps 110~38,400 bps
Number of data bits
7 bits~8 bits
Parity bit
Even/Odd parity bit/None
Number of stop bits
1 data bit~2 data bits
Register where a communication
format is stored
D1036 D1120 D1109
ASCII mode
Slave station
Master station/
Slave station
Slave station
RTU mode
Slave station
Master station/
Slave station
-
Quantity of data read/written (ASCII
mode)
100 registers 32 registers
Quantity of data read/written (RTU
mode)
100 registers 32 registers
Default communication protocol supported by a communication port
ï€
Modbus ASCII mode
ï€
7 data bits
ï€
1 stop bit
ï€
Even parity bit
ï€
Serial transmission rate: 9600 bps
2.3.1 COM1 (RS-232 Port)
1. COM1 is an RS-232 port. Users can upload the program in a DVP-20PM series motion controller
through COM1, and download a program to DVP-20PM series motion controller through COM1. The
communication protocols that COM1 supports are Modbus ASCII and Modbus RTU, and the
transmission rate supported is in the range of 9,600 bps to 115,200 bps.
The communication cable DVPACAB2A30 is described below.
TO PC
1
5
6
9
9 PIN D-SUB
TO DVP-PM
MINI DIN TERMINAL
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