Rockwell Automation 1771-DB Basic Module User Manual - Series A - Manual (Page 35)

Using the Serial Ports
Chapter 4
4–11
You can use a 1770-SB Data Cartridge Recorder or 1770-SA Digital
Cassette Recorder to save and load BASIC programs to the BASIC
Module. Figure 4.6 shows cable pin connections. Use the connections
shown in figure 4.6 otherwise improper operation could occur. Note that
the standard cable does not connect properly with the BASIC Module.
Refer to the user manuals for the 1770-SB (publication number
1770-6.5.4) and 1770-SA (publication number 1770-6.5.1) for more
information on these recorders.
It is not necessary to set the peripheral port parameters (except baud rate)
before CALLing the recorder interface routines. This is done automatically
by the software. The parameters are returned to their original state when
the routine is complete.
You can find more information on saving and loading programs in Chapter
6 of this manual.
Important: STR LINK II and III Recorders do not function like SA/SB
recorders. Do not use them with the BASIC Module.
You can connect a 1770-HC Printer to the peripheral port for program
listing, report generation etc. Figure 4.7 shows cable pin connections.
Refer to your printer product manual for more information.
We recommend enabling XON/XOFF on the peripheral port (see Chapter 5
section titled, “Peripheral Port Support – Parameter Set”) and selecting
XON/XOFF(DEC) protocol on the 1770-HC Printer (switch selectable).
Refer to your printer manual. You can find more information on printing
reports and listing programs in Chapter 5 of this manual.
The BASIC Module can communicate with various RS-422 devices.
RS-422 signals for both sending and receiving data are located on the
module’s peripheral port. Figure 4.9 shows point-to-point signal
connections. The RS-422 port floats (i.e no voltages are applied to the
output) when it is not sending characters. This allows you to connect two
transmitting devices on the same line. Also, you can connect more than one
device in a multi-drop configuration (figure 4.10).
4.4.3
Connecting a 1770-SA/SB
Recorder to the Peripheral
Port
4.4.4
Connecting a 1770-HC
Printer to the Peripheral Port
4.4.5
Connecting RS-422 Devices