29
Banner Engineering Corp.
•
Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
P/N 64118 rev. B
5.4 Serial Communication with a Host Controller
The control module communicates with a host process controller via RS-232 or
RS-485 protocol and at the baud rate specified in the Serial Communications box
(section 5.3.1). The System provides a number of data transmission options.
5.4.1 Serial Data Transmission
The serial transmission portion of the PSF Configuration screen activates the serial
port(s), specifies the data format, and provides data suppression options. These
settings are required to allow a control module to communicate with a host computer
or process controller. If
No Serial Communication
is selected (the default setting),
the serial port(s) will not transmit sensing data.
Measurement Mode Result:
data transmitted will be the values output for the Scan
Analysis Mode selections. Up to two Scan Analysis Mode selections can be active.
ALL Mode:
the status of each beam in the light screen array will be transmitted for
each scan.
In ALL mode, blanked channels are transmitted as unblocked (or clear)
beams.
Max Meas Mode:
the control module records the maximum measurement value
registered while the light screen is blocked. That data may be transmitted to the host
either when the array is clear at the end of the sensing event (select
Send On Clear
),
or when prompted by the host (select
Send On Request
). This mode reduces the
amount of serial data sent.
5.4.2 Transmission Type
Transmission type defines the format in which data is sent. The
ASCII
option causes
the control module to send data in three ASCII-coded bytes. The
Binary
option causes
data to be sent in binary format, reducing the amount of data per measurement mode
from three bytes to two. For more information on the data formats, refer to Appendix
A.
Figure 5-25. Serial Data Transmission
options (PSF Configuration
screen)
Control Module Configuration
Banner Engineering Corp.
•
Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
