|
Always use the maximum
baud rate (38,400bps for SCMT100MX) for best performance. For short
distances of less than 2m, any ordinary pair of cables can be used
to connect the RS485 interfaces. Make sure that the “+” and “-”
terminals of both RS485 terminals are correctly connected to each
other.
Code:
MDS100 price: U$D 80 |
The MDS-100 is specially
designed to work with the SCMT100MX PLC to provide a low cost
solution for displaying alphanumeric characters on a 4 lines x 20
characters, high contrast, bright back-lit LCD screen. Although
all SCMT100MD+ PLCs have a
built-in LCD port, it can still utilize the MDS100 for additional
display job, especially at a long distance and away from the machine.
MDS-100 comprises a daughter board (the “control
board”) that is plugged onto the back (“piggy-backed”) of an
industry standard 4x20 LCD module. The control board may be removed
during installation of the LCD module but care must be taken to plug
it back with all the pins correctly aligned before turning on the
power, otherwise the LCD panel and/or the control board may be
severly damaged.
| Jumper |
J1 (Baud
Rate) |
J2 (Power
Supply) |
| Open |
38400 bps |
24V |
| Short |
9600 bps |
12V |
Messages to be displayed on the LCD are
sent from the PLC to the MDS-100 via their respective RS485 ports at
either 38,400 or 9,600 bits per second, selected by the setting of
Jumper J1 when power-on (see table). |
Cod: SCMLCD420 price: $55,
includes cable and
backlight.
SCMT100
Cod: SCMLCD216
price: $35,includes
cable and backlight.
SCMT100 |
These two low cost alphanumeric display modules are STN (super-twisted
nematic) type display with yellow green LED backlight. Both modules
are supplied with the ribbon cable and plug for immediate connection
to a SCMT100MD+ PLC's built-in LCD port. A backlight current limit
resistor is also included in the package. Programming the display is
unbelievably easy! All that is needed is to execute the TBASIC
command once :
SETLCD r, c, <text
string>
where r is the row
number and c is the column number, followed by a text string which
can be any ascii text or numerical values converted into text string
using the STR$(n) or HEX$(n) command. This allows the LCDs to
display any internal data for intelligent operator interface.
These two low cost
alphanumeric display modules are STN (super-twisted nematic) type
display with yellow green LED backlight. Both modules are supplied
with the ribbon cable and plug for immediate connection to a
SCMT100MD+ PLC's built-in LCD port. A backlight current limit
resistor is also included in the package. |
