Rockwell Automation 57C620 AutoMax Programming Executive Version 3.8 - Manual (Page 230)

AĆ2 AutoMax Programming Executive Version 3.x
Programming Terminal End
9ĆPin Female Connector
SIGNAL PIN#
RECV ă2
XMIT ă3
CTSă8
RTSă7
DTR ă4
DSR ă6
COM ă5
Reliance End
25ĆPin Male Connector
PIN# SIGNAL
ă2 XMIT
ă3 RECV
ă4 RTS
ă5 CTS
ă6 DSR
20 DTR
ă7 COM
Figure 2
User Serial Ports
All Processor module ports except for the port PROGRAMMER/PORT B" on the
leftmost Processor in the rack are available to the user to connect to an external
device. In order for the application software to be able to use a serial port, you
must first use the OPEN statement in a BASIC task. Refer to the Enhanced BASIC
Language Instruction Manual (JĆ3675) for more information. Note that on
AutoMax Processor modules, you can OPEN PORTA" or OPEN PORTB". The
following is a description of the pins on ports available to the user.
Pin# Function
2
Output. This signal contains transmitted data.
3 Input. This signal contains received data.
4 Output. This signal indicates transmitter status and is true whenever the
transmitter is sending characters. The signal is typically used to enable an
external device, e.g.,a modem. The signal is meaningful only if hardware
handshaking has been enabled.
5 Input. This signal enables the transmitter. It must be true in order for the
transmitter to send a character. The signal is typically used for hardware
flow control. This input is ignored if hardware handshaking has not been
enabled.
6 Input. This signal enables the receiver. It must be true in order for the
receiver to accept characters. If this signal becomes false while a message
is being received, any characters being received will be deleted and an
error will be reported to the application software. This input is ignored to
the application software. This input is ignored if hardware handshaking
has not been enabled.
7 Signal ground.
20 Output. This signal indicates receive status. The signal is true whenever
the receiver will accept characters. It is typically used for hardware flow
control. The signal is meaningful only if hardware handshaking has been
enabled.