PRINTING TEMPERATURES USING ONLY PLC & PRINTER

Printing 10 Temperatures using Only Twido PLC & PRINTER

In this Application a PLC Twido is used to print 10 temperatures directly to a SERIAL EPSON dot matrix Printer using the Port 2 as ASCII mode
Configuration Software Twido V3.5
Twido PLC CPU TWDLMDA40DTK
TWDNOZ232D Port 2 : ASCII
TWDXCPRTC Real Time Clock
Analog cards 5 TWDALM3LT (2In MultiSensor/1Out)
The Inputs is configured as thermocouple J
The cable used for connection with the printer is the TSXPCX1031 in ascii mode
Configuration of the PLC Port2

Configuration of Analog Cards

The PLC communication with the Printer is being done using the command EXC

The explanation of the EXC command is left for another post

This application is written only for TWIDO PLC

You could request for the program

DAYLIGHT SIMULATION FISHTANK

This application simulate the daylight and night circle for artificial lighting
(fluroscents lamps) in a dark fishtank. The purpose is to control the intensity
of 2 fluroscent lamps during the day. So in a specific hour of the day the
lamps turn on slowly with a ramp-up during daybreak , then stay on
with full power for some time, then start to turn off slowly with a ramp down
during dusk period and finally stayed off in night period.
We use an analog voltage output (0 - 10V) to control a fluroscent lamp rheostat.

The ramp up period (04:00 till 08:00)
The steady state ON period (08:00 till 16)
The ramp down period (16:00 till 20:00
The night Off period (20:00 till 04:00)
The above periods is fixed and cannot be changed. If other periods need we could change these fixed periods. The program could be expand using a XBT to change the periods, but this is left upon user request

The configuration used is
Twido Software V3.5
We could use any Twido PLC with an analog card. In the application
TWDLMDA20DTK : CPU
TWDAMO1HT : Analog card 12 bits resolution
TWDXCPRTC Real Time Clock


In the application we use a 12 bits analog card
Steps/min=4095/4*60 = 17,0625steps/min
Voltage/min = 17,0625*10V/4095 = 0.0416667 Volts/min

Use of the application is for dark fishtank (vivarium) not open one. Maybe the user could use the program in various other applications

You could request for the program