55
8
Standard Interface
55
Chapter
8
8-5.
RS-232C interface
RS-232C is an interface for reading the indicated values and status of the UPM100 and writing the
setting values into the UPM100. This interface is convenient for controlling, totaling and recording
by connecting the UPM100 to a computer, process controller, PLC, etc.
Communication specifications
Signal level
RS-232C compliant
Transmission distance
Approximately 15m
Transmission method
Asynchronous, full duplex
Transmission speed
Select from 2400, 4800, 9600, 19200 or 384000 bps.
Bit configuration
Start bit:
1 bit
Length of character: Select from 7 or 8 bit
Stop bit:
Select from 1 or 2 bit
Parity bit:
Select from NONE, even number, or odd number
Code
ASCII
Connector pin assignments
Compatible plug
9-pin D-SUB connector
XM2D-0901 manufactured by OMRON (Cover: XM2S-0913 <with inch screw #4-40>)
Connection
This connection figure indicates an example of a cable layout when the PC used is a DTE (Data
Terminal Equipment). Use a straight type cable when the connecting counterpart is a DCE (Data
Circuit-terminating Equipment) such as a modem.
Create cables after double-checking connector shapes and signal wires (pin assignment) of devices
to be used.
Pin number
Direction
Signal name
Pin number
Direction
Signal name
1
6
2
IN
RXD
7
OUT
RTS
3
OUT
TXD
8
IN
CTS
4
OUT
DTR
9
*
SHIELD
5
*
GND
1
2
RXD
3
TXD
4
DTR
5
GND
6
7
RTS
8
CTS
9
e.g.: UPM100
PC and so on
D-sub 9-pin
Equipment equivalent to XM3D-0921
1
CD
2
RXD
3
TXD
4
DTR
5
GND
6
DSR
7
RTS
8
CTS
9
RI
