Industrial Shields Raspberry PLC 19R+, Quick User Manual

Page: 39 / 53

Rev. 8: 29-04-2021
38
Set Value
The set function will initialize the pin. We will provide the pin with which we are going to work
and the value that will be set. If we are working as the analogical option , the value will work in
a range from 0 to 4095 , being this the maximum possible value (10 Vdc). Otherwise, for the
digital option a logical 1 will turn on the pin while a 0 will stop it. In the case that we want to
control a relay option , it will work out as a digital option, where a logical 1 will turn on the
device and the logical 0 will shut down it.
By default, if not value option is provided it will be initialized as a 1 for the Digital and for the
Relay or a 50% for the Analogic. If any other options are chosen, an error code will warn us. In
order to call the function, we will do the following:
There is also the PWM option (that must be executed from the set-analog-output script) , that
configures the output to work as PWM and you must specify as parameters the digital output
and the width of the pulse. The width of the pulse is the high time period of the duty cycle and
it has a range from 0 to 4095 (12 bits). For example, if you want a high time period of 25% you
must put 1024 and if you want a high time period of 100% you must put 4095.
The PWM parameters of the script do not have to be modified to ensure a correct behaviour of
the PWM.
NOTE: See the Section 8 to know which outputs are PWM supported.
./set-digital-output <output> <value>
./set-analog-output <output> <value>
./set-relay <output> <value>
./set-analog-output <output> <pulse width value>