OPERATOR’S MANUAL
GAC® 2100 Grain Analysis Computer (Blue, Gray, Agri Models)
11001-1688-201609
APPENDIX A: COMMUNICATION PORTS 79
APPENDIX A: COMMUNICATION PORTS
COM1 PORT OPTIONS
NOTE: COM 1 port requires a standard
DTE/DCE RS 232 cable without
a null modem when connecting
to a printer or computer.
The COM1 Port (refer to Table 2) is a serial port conforming to the EIA/TIA
RS-232-E standard and configured as Data Communication Equipment
(DCE). Data out is RS-232-E levels and parity with adjustable Format, Data
Setup and Control.
COM1 PIN ASSIGNMENT DETAILS
COM1 (refer to Table 3) is configured as Data Communication Equipment
(DCE).
Protective Ground (pin 1) – Electrically connected to frame.
Received Data (pin 3) – Transmitted data from the GAC 2100.
Data Set Ready (pin 6) – ON (positive voltage) whenever the
GAC 2100 is powered.
Signal Ground (pin 7) – Common reference for all other COM1 signals.
Received Line Signal Detector (pin 8) – ON (positive voltage)
whenever the GAC 2100 is powered.
Busy (pin 11) – Gates the transmission of data from the GAC 2100. The
COM1 Control Lead Setup screen may be configured ACTIVE (+),
ACTIVE (–) or IGNORE. When the line is inactive, up to 2048
characters are buffered. If not connected, configure this line as
IGNORE.
Table 2. COM1 Programmable Options
Function Option Hex
Output Format PRN 20
PRN 80
TST 20
PRN 81
CSV 01
PRN 21
Line Terminator LF (Line Feed) 0A
CR (Carriage Return 0D
LF + CR 0A, 0D
CR + LF 0D, 0A
Data Setup 300
Baud Rate 600
1200
2400
4800
9600
19200
Control Busy Ignore
Active (+)
Active ( Ð)
Control DTR Ignore
Active
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