PLCLogo Solution: Logo Output Switching

Tutorials & Examples Solutions
4

This is a idea of switching Outputs without using Pulse things and with groups

Problem Statement

How to switch a Logo-output for lights or power outlets via openHAB and in parallel via a physical wall-switch which is directly connected to a Logo-input? The status of the Logo-output shall be correctly monitored. With pulse-items there is a chance of hanging pulses. so that a solution without pulse-items is desirable.

Concept

A proxy-item is used for the UI to store the on/off state (for visualisation) and for user-interaction. UI-commands are sent to the M-item (switch) which toggles the Logo’s relay (Q-output). Events originating from Logo (physical wall-switch pressed causing relay changes) will update the proxy-item by the rule. A rule triggered once at openHAB startup initializes the proxi-item and writes the current relay status into it.

Solution

LOGO! Configuration (LOGO! SoftComfort Diagram Editor)

Logo
Logo.PNG728×388 3.84 KB

Things (logo.things)
In this example, the IP address 192.168.xxx.yyy represents the Logo device’s address and must be adapted.The TSAP parameters must be adjusted as well.

Bridge plclogo:device:Logo [ address="192.168.178.21", family="0BA8", localTSAP="0x3000", remoteTSAP="0x2000", refresh=200 ]
{
  Thing digital  Outputs [ kind="Q" ]
  Thing digital  Marker [ kind="M"]
}

Items (logo.items)

Group:Switch Logo_M
Group:Switch Logo_Q
Group:Switch:OR(ON,OFF) Logo_proxy "Lights [%d]"
Switch  Logo_M1  (Logo_M)   { channel="plclogo:digital:Logo:Marker:M1"}
Switch  Logo_Q1   (Logo_Q)  { channel="plclogo:digital:Logo:Outputs:Q1"}
Switch  Logo_proxy_1   "Light Q1" (Logo_proxy)
//Switch  Logo_M2  (Logo_M)   { channel="plclogo:digital:Logo:Marker:M2"}
//Switch  Logo_Q2   (Logo_Q)  { channel="plclogo:digital:Logo:Outputs:Q2"}
//Switch  Logo_proxy_2   "Light Q2" (Logo_proxy)
//etc...

Rules (logo.rules)

rule "Logo lights"
when
    Member of Logo_Q changed or                         // light changed external
    Member of Logo_proxy received command               // light changed internal
then
    val Input = triggeringItem                          //Logo_proxy_x or Logo_Qx
    if(receivedCommand==ON || receivedCommand==OFF) {   // ensure there was a received command, so second item triggered rule          
        
        val Nummer=Input.name.split("_").get(2)         //gets number of input/output
        val Logo_Qx= Logo_Q.members.findFirst[ t | t.name == "Logo_Q"+Nummer ]
        val Logo_Mx= Logo_M.members.findFirst[ t | t.name == "Logo_M"+Nummer ]
        if (Logo_Qx.state != receivedCommand) {         // only if state changed
            if (Logo_Mx.state == OFF ){                 // change State of M
                Logo_Mx.sendCommand(ON)                 
            }
            else {
                Logo_Mx.sendCommand(OFF)                // change State of M
            }
        }
    }
    else {                                              // no trigger from proxy switch, so state changed externally
        val Nummer=Input.name.split("Q").get(1)
        val Logo_proxy= Logo_proxy.members.findFirst[ t | t.name == "Logo_proxy_"+Nummer ]
        if (Input.state != Logo_proxy.state) {  // if state changed really
            Logo_proxy.postUpdate(Input.state)  // update the state without triggering the rule
        }
    }
end

rule "Startup"
when
   System started
then
   // logInfo("StartUp", "System startup: Logo states flushed into proxy switches")
   // update the state at startup
Logo_proxy.allMembers.forEach [ item|
        val Nummer = item.toString.split("_").get(2)
        val Nummer2 = Nummer.toString.split(" ").get(0)
        val Logo_Qx= Logo_Q.members.findFirst[ t | t.name == "Logo_Q"+Nummer2 ]
        item.postUpdate(Logo_Qx.state)
    ]
end

Sitemap (Logo.sitemap)

sitemap Logo label="Logo" {
    Frame label="Lights" icon="lightbulb" {
        Switch item=Logo_proxy_1 label="Light Q1" icon="lightbulb"
        Group item=Logo_proxy label="Logo lights" icon="lightbulb"
    }
}

The group Design saves 380 lines of rule-code for a Logo with 20 lights at its Outputs. For a new light only .items file has to be edited, with 3 new lines.

Revision History

  • changed to group based design

Troubleshooting

  • none

Next Ideas

  • none
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