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PN 074-550-P1C
SQC-310 Operating Manual
Chapter 4
Communications
4.1 Introduction
SQC-310 offers the following types of data communications hardware ports:
RS-232C: 19200 to 115200 bps baud rate, 8 data bits, and no parity (standard)
Ethernet: Port 2101, address 192.168.1.200 (optional)
USB: PID 8292 (optional)
The RS-232C and Ethernet ports can be used simultaneously.
Both the host and server must have the same form of communications equipment
and complementary setup. For serial communications, the baud rates and data
word format must match.
The word format for bit serial lines (RS-232C) is comprised of ten signal bits:
eight data bits, one start bit, one stop bit, and no parity. The eight data bits contain
a byte of information or character whose ASCII value ranges from 0 to 255.
4.1.1 RS-232C Serial Port
RS-232C serial communications are accomplished through an industry standard
9-pin female connector found on the SQC-310 rear panel (refer to Figure 2-2 on
page 2-4). A mating male connector is required to attach a host interface. The host
and SQC-310 can be separated by up to 15.2 m (50 ft.) using a multiconductor
shielded data cable.
For successful communications, the baud rate of the host computer and SQC-310
must match. Available baud rate options are: 2400, 4800, 9600, 19200, 38400,
57600, and 115200 bps.
SQC-310 is configured as DCE (Data Communication Equipment).
NOTE: Unpredictable RS-232 hardware/software combinations may occasionally
cause a command to not be recognized by SQC-310. Consequently, all
communications should include an automatic retry procedure. If a
command sent using RS-232 does not produce a response from SQC-310
within three seconds, it should be sent again.
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