Hardware Structure
The
front panel of HMIMODBUS is as shown in
the following figure. There is the 4.3’’STN LCD display at the top
left corner. At the top right corner and the bottom there are 20
thin-film switch keys, which have a good handle and a long life. The
Up Key, Down Key, ESC key, SET key, ALM key and ENT key are system
keys. Except the basic function, the other fourteen keys can be set
as special function keys to realize the Screen-jumping and digital
setup functions.
The
front of panel of
HMIMODBUS
programmable text display is shown as follows:
Basic
function of keys: setting the input value of the PLC registers.
Special
function of keys: Bit setting, Bit resetting and Screen jumping etc.
On the
right side of
HMIMODBUS
there
are power terminal and COM port and on the left side there is a
contrast potentiometer. Refer to the following figure for details.
When
programming with
HMIMODBUS
software, please select the proper connection mode according to the
type of PLC. After completing the edition, connect the
HMIMODBUS
and the
relative serial COM port of the PC via the programming cable SH-Cable.
Then power on
HMIMODBUS
and
click the download icon to download the project file into
HMIMODBUS.
When
using if the contrast of the LCD isn’t fit, revolve the contrast
potentiometer on the left side with small sized screwdriver till the
contract reach the desired degree
The
display of
HMIMODBUS
is with
LED background light. Press any key, the background light will be
turned on automatically. The backlight will be turned off
automatically if there is no operation in the minutes .Users can
modify the turnoff time of the background light in
HMIMODBUSsoftware
and then download into
HMIMODBUS.
And it will be OK.
The structure figure of HMIMODBUS COM Port :
Pin
Definition of
HMIMODBUS COM Port:
|
Pin |
Definition |
|
1 |
TD+ |
|
2 |
RXD |
|
3 |
TXD |
|
4 |
NC |
|
5 |
GND |
|
6 |
TD- |
|
7 |
RTS |
|
8 |
RD- |
|
9 |
RD+ |
Cable Wiring figure:
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