RC32c and RC16C Operators Manual
Goodwin Electronics
D1011/v1.7 /23/10/03
Page 15
7. SERIAL COMMUNICATIONS
The models RC32C and RC16C have a serial communication protocol compatible with Trans PG IN via
the 25way D type connector on the rear of the unit. Connection is via a simple 4 wire V24 interface,
(transmit data receive data, CTS and ground). Table 7.1 shows the standard pin out connection.
When the RS232 is active the B display will show
tr
. if the cam is uploading data and
rc
if the cam is
having data downloaded to it. The A display will indicate the number of bytes received or transmitted.
There is a time-out of approx. 30 sec which will be activated if there is an error detected in the RS232
transmission. This will also produce an error code 7. Pressing any key will clear the error message.
Under some conditions this time-out can be defeated and thus if the display is not responding to the
incoming/outgoing data for a period of time greater than 30 sec, switch off the power and then restart the
unit 60 sec later.
TABLE 7.1
RS232 CONNECTION 25 WAY D TYPE
PIN
CAM
connect to
PIN
PC
7
GROUND
7
GROUND
2
TRANSMIT DATA
3
RECIEVE DATA
3
RECIEVE DATA
2
TRANSMIT DATA
In all communications the cam will be the master of the two units, i.e., the cam will initiate all
communications.
7.1 TRANS PG IN COMMUNICATIONS
Trans PG IN is a simple program to dump and upload data.
Connect the 25 way D type connector as indicated by table 7.1.
Select the RECORD mode and press the JOG UP key, the B display will show tr and the A display will
indicate the number of bytes sent by the RC32C. Data of all the switching points in all batches will be
sent to the serial port in ASCII form. When this has been completed the unit will return to the default
mode.
If the JOG DOWN key is pressed, the B display will show rc and the A display will indicate the number of
bytes received by the RC32C. Data of all the switching points in all batches will be downloaded via to the
serial port in ASCII form. When this has been completed the unit will return to the default mode.
If any transmission fault should occur in the serial link (in either direction) then error code 7 will be
displayed.
Note the communication RS232 configuration is
9600 baud, 8 data bits, even parity and 1 stop bit.
