IBM MegaBasic IC697PCM711 Quick Start Manual page 3

Coprocessor Modules
Programmable Coprocessor Module
Programming and Configuration
An IC647 or IC640 computer, or IBM-compatible PC,
XT, or AT computer with PCM Development Software
installed is connected to the top port of the PCM. The
default setting is 19,200 bps. The PCM Development
Software is used to configure the serial port parame-
ters, to define the interface to the PLC CPU, to select
task functions and to program MegaBasic applica-
tions. The PCM parameters can also be configured
r
using MS-DOS or Windows
ware. Consult reference 3 for details of operation.
Programmer
Î Î Î Î
Î Î Î Î
Î Î Î Î
Î Î Î Î Î Î Î Î
Î Î Î Î Î Î Î Î
Î Î Î Î Î Î Î Î
Figure 3. PCM Development System Connection to PCM
Serial Ports
Both ports are RS-232 and RS-422/RS-485 compatible.
Both ports acting simultaneously can each support up
to 9.6 Kbaud full duplex data communications, or they
can support up to 19.2 Kbaud individually.
Port 1 (3PL) and Port 2 (4PL)
Connectors 3PL and 4PL contain signals for both RS-232
and RS-422/ RS-485 types of communication circuits. The
pin-out for the RS-232 signals are per the RS-232 specifi-
cation with an exception that pins not normally used for
RS-232 are used for RS-422/ RS-485 signals. Details are
shown in tables 1 and 2.
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programming soft-
a43735
IC697CBL705
Î
RS-232
PCM
(DEFAULT PORT)
3PL
Î
Î Î
4PL
PCM
PROGRAMMING S/W
PIN PIN
TXD 2 3 RXD
RXD 3 2 TXD
RTS 4 5 CTS
CTS 5 20 DTR
8 8
20 1 SHLD
GND 7 7 GND
PCM
IC647 AND
25-PIN
IBM PS/2
CONNECTOR
25-PIN CONNECTOR
Table 1. Port 1 or 2 - RS-232
PIN FUNCTION
1
Shield
2 Transmitted Data
3 Received Data
4 Request To Send
5 Clear To Send
7 Signal Ground
8 Data Carrier Detect
20 Data Terminal Ready
Table 2. Port 1 or 2 - RS-422/RS-485
PIN FUNCTION
9 Send Data (A)
10 Request to Send (A)
11 Clear to Send (A)
12 Termination for pin 13
13 Receive Data (A)
21 Send Data (B)
22 Request to Send (B)
23 Clear to Send (B)
24 Termination for pin 23
25 Receive Data (B)
Configuration
There are no user DIP switches or jumpers on this
board for configuration. However, the board must be
configured before operation using PCM Development
Software (See reference 3).
Status Indication
Three Status LEDs are available as shown in Figure 2.
The top LED indicates the condition of the module, the
bottom two LEDs may be assigned to a configured
function.
Controls
One pushbutton is provided. Push and hold for less
than 5 seconds will restart an application. Push and
hold for more than 5 seconds and the module factory
default configuration will be installed (this action will
not clear memory but will permit communication with
the programmer using factory default settings).
3
GFK-0164G
August 1997
SIGNAL
NAME
I/O
- -
TD Output
RD Input
RTS Output
CTS Input
0V -
DCD Input
DTR Output
SIGNAL
NAME
I/O
SD (A) Output
RTS (A) Output
CTS (A) Input
- -
RD (A) Input
SD (B) Output
RST (B) Output
CTS (B) Input
- -
RD (B) Input