Rockwell Automation 57C570 AutoMax PC3000 User Manual - Manual (Page 136)

11Ć8
Table 11.2 Ć Pin Assignments for the AutoMax PC3000 Serial Card's Port B
ÁÁÁ
Pin:
ББББББББ
Assignment:
БББ
БББ
2 ББББББББ
ББББББББ
TXD.Out
БББ
БББ
3 ББББББББ
ББББББББ
RXD.In
БББ
БББ
4
ББББББББ
ББББББББ
RTS.Out
БББ
БББ
5
ББББББББ
ББББББББ
CTS.In
БББ
БББ
6
ББББББББ
ББББББББ
DSR.In
БББ
7
ББББББББ
SIG.GND
БББ
БББ
10 ББББББББ
ББББББББ
+12 V.Out
БББ
БББ
20 ББББББББ
ББББББББ
DTR.Out
Note: If you do not enable bit 15 (hardware handshaking) in the
SETUP parameter of the OPEN statement, only pins 2, 3, and 7 of the
port you OPEN are functional.
Pin Number I/O RSĆ232 Function
2 O Transmitted data
3 I Received data
4 O Transmitter status
The signal is true whenever the transmitter is
sending characters. It is used to bracket" a
character transmission. It can be used to
enable/disable any type of external equipment,
such as a triĆstate transmit modem, which
requires an enable signal to output characters.
Refer to the OPEN statement in the BASIC
Language instruction manual for details about
the operation of the Modem Enable signal
(RTS).
5 I Transmitter enable
The signal must be true for the transmitter to
send a character. This signal is typically used for
hardware flow control when hardware
handshaking has been enabled.
6 I Receiver enabled
This signal must be true for the receiver to
accept characters. If the signal becomes false
while a message is being received, characters
being received are deleted and an error is
reported to the application software. This signal
applies when hardware handshaking is enabled.
7 ground Signal ground