node-red-contrib-sm-ind

This is the node-red node to control Sequent Microsystems Industrial Automation card.

Manual Install

Clone or update the repository, follow the instrutions from the first page.

In your node-red user directory, typicaly ~/.node-red,

~$ cd ~/.node-red

Run the following command:

~/.node-red$ npm install ~/megaind-rpi/node-red-contrib-sm-ind

In order to see the node in the palette and use-it you need to restart node-red. If you run node-red as a service:

~$ node-red-stop
~$ node-red-start

Usage

After install and restart the node-red you will see on the node palete, under Sequent Microsystems category 13 new nodes:

IND 0 10V in

This node reads one 0-10V input channel (Make sure the corresponding jumper is removed in order for this read to be correct). The card stack level and channel number can be set in the node dialog box or dynamically through msg.stack and msg.channel. The read is triggered by the message input and output can be found in the output message payload as a number representing the voltage readings in volts.

IND 0 10V out

This node controls one 0-10V output channel. The card stack level and channel number can be set in the node dialog box or dynamically through msg.stack and msg.channel. The value in volts is set dynamically as a number between 0..10 thru msg.payload.

IND 4 20mA in

This node reads one 4-20mA input channel. The card stack level and channel number can be set in the node dialog box or dynamically through msg.stack and msg.channel. The read is triggered by the message input and output can be found in the output message payload as a number representing the current readings in milliamps.

IND 4 20mA out

This node controls one 4-20mA output channel. The card stack level and channel number can be set in the node dialog box or dynamically through msg.stack and msg.channel. The value in milliamps is set dynamically as a number between 4..20 thru msg.payload.

IND +/-10V in

This node reads one +/-10V input channel (Make sure the corresponding jumper is placed in order for this read to be correct). The card stack level and channel number can be set in the node dialog box or dynamically through msg.stack and msg.channel. The read is triggered by the message input and output can be found in the output message payload as a number representing the voltage readings in volts.

IND OPT cnt

This node reads the optically coupled input counter for one particular channel and sets the counting edges for that channel. Card stack level and optically coupled input counter channel number can be set in the node dialog box or dynamically through msg.stack and msg.channel. Rising edge counting and/or falling edge counting can be enabled/diabled with corresponding check box in the node dialog. Edge settings are sent to the card every time you deploy this node or the flow starts or you select a different channel for reading through msg.channel. The read is triggered by the message input and output can be found in the output message payload. The counter can be reset by sending to the node a message with the attribute reset equal to 1, msg.reset = 1.

IND OPT in

This node reads the optically coupled input state for one particular channel. Card stack level and optically coupled input channel number can be set in the node dialog box or dynamically through msg.stack and msg.channel. The read is triggered by the message input and output can be found in the output message payload as boolean.

IND OD out

This node controls one Open-Drain output channel. Card stack level and channel number can be set in the node dialog box or dynamically through msg.stack and msg.channel. The value in percentage is set dynamically as a number between 0..100 thru msg.payload.

IND CPU Temp

This node reads the temperature from the CPU on the Sequent board.

Card stack level can be set in the node dialog box or dynamically through msg.stack.

The integer value in units of degrees Celcius is set dynamically as a number via msg.payload.

NB - not sure if the byte read from the Sequent board is signed or unsigned, so the range might be -128C..+127C, or it might be 0C..255C.

IND PS Voltage

This node reads the power supply voltage (nominally 24V) from the CPU on the Sequent board.

Card stack level can be set in the node dialog box or dynamically through msg.stack.

The floating point value in volts is set dynamically as a number via msg.payload.

IND RasPi Voltage

This node reads the voltage supplied to the Raspberry Pi (nominally 5V) from the CPU on the Sequent board.

Card stack level can be set in the node dialog box or dynamically through msg.stack.

The floating point value in volts is set dynamically as a number via msg.payload.

IND LED Out

This node controls one LED channel.

The card stack level and LED channel number can be set in the node dialog box or dynamically through msg.stack and msg.channel.

The value in volts is set dynamically as a number. 0 is off; anything else is on via msg.payload.

IND Read RTC

This node reads the Real Time Clock (RTC) from the Sequent board.

NB Since there is no indication of timezone, Node interprets the time from the RTC to be in the system local time.

Card stack level can be set in the node dialog box or dynamically through msg.stack.

The date and time are set dynamically as a Date via msg.payload.

IND OWB Temp

This node reads the temperature from 18B20 sensors connected on the one wire bus interface of the cards

Card stack level and sensor channel number can be set in the node dialog box or dynamically through msg.stack and msg.channel. The read is triggered by the message input and output can be found in the output message payload as boolean.

IND OWB Scan

This node start the connected sensors scaning process

Card stack level can be set in the node dialog box or dynamically through msg.stack

Important note

This node is using the I2C-bus package from @fivdi, you can visit his work on github here.  The inspiration for this node came from @nielsnl68 work with node-red-contrib-i2c. Thank both for the great job.