Table Of Rs-232 Standard Signals And Their Jis And Ccitt Abbreviations; Handshaking - YOKOGAWA MT210 User Manual

Overview of the RS-232 Interface

Table of RS-232 Standard Signals and Their JIS and CCITT Abbreviations

Handshaking

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Table of Signals
Pin Number
(25-pin connector) RS-232
1* AA (GND)
7* AB (GND)
2* BA (TXD)
3* BB(RXD)
4* CA(RTS)
5* CB(CTS)
6 CC(CSR)
20 CD(DTR)
22 CE(RI)
8 CF(DCD)
21 CG(-)
23 CH/CI(-)
24/15 DA/DB(TXC)
17 DD(RXC)
14 SBA(-)
16 SBB(-)
19 SCA(-)
13 SCB(-)
12 SCF(-)
* Pins used by the MT200 or MT200 series or this instrument RS-232 interface.
To use an RS-232 interface for transferring data between the instrument and
a PC, it is necessary to use certain mutually determined procedures to ensure
the proper transfer of data. The execution of these procedures is called
handshaking. There are many different handshaking methods corresponding
to the different possible combinations of instruments and PCs, so it's necessary
choose the same handshaking method for this device and the PC.
This instrument allows you to choose any handshaking mode from the following
eight modes.
Table of Handshaking Methods (
Software
Handshake
Sending
Mode Selection
stops when
No.
X-off
(Handshaking
received, and
method)
resumed
when X-on
is received.
0 ( O F F - O F F )
1 ( X O N - X O N )
2 ( X O N - R T S )
3 ( C T S - R T S )
Abbreviation
CCITT JIS
101 FG
102 SG
103 SD
104 RD
105 RS
106 CS
107 DR
108/2 ER
125 CI
109 CD
110 SRS
111 SRS
113/114 ST1/ST2
115 RT
118 BSD
119 BRD
120 BRS
121 BCS
122 BCD
= Function Available)
Data sending control
(Control method when
sending data to a PC)
Hardware
Handshake
Sending
stops when
CB(CTS) is
False, and
resumed
No
when CB is
handshake
True.
Name
Protective ground
Signal ground
Transmitted data
Received data
Request to send
Clear to send
Data set ready
Data terminal ready
Ring indicator
Data channel received carrier detect
Data signal quality detect
Data signal rate select
Transmitter signal element timing
Receiver signal element timing
Secondary transmitted data
Secondary received data
Secondary request to send
Secondary clear to send
Secondary received carrier detect
Data receiving control
(control method when receiving
data from a PC)
S o f t w a r e H a r d w a r e
H a n d s h a k e H a n d s h a k e
X-off is sent CA(RTS) is set
when received to Falso when
data buffer received data
becomes 3/4 buffer is only
full, and X-on 3/4 full, and is
is sent when set to True
the received when received
data buffer data buffer
is only 1/4 full. is only 1/4 full.
No
handshake
IM 767361-01E