Is anyone even monitoring this anymore?

[RobertMiller-KR2]

Im trying to use this to communicate with a iQ-F plc FX5UC. I cannot seem to get it to return any informaiton from the PLC. It states it connects ok but then all the values returned are BAD 255. I am using the sample code but have commented out all the Tests except Test 2 and set it to only read M0-M15

`import mc from 'mcprotocol';
var conn = new mc;
var doneReading = false;
var doneWriting = false;

var variables = {
TEST2: 'M0,16', // 16 bits Starting at M0 (M0-M15)

};

conn.initiateConnection({port: 1250, host: '192.168.3.250', ascii: false}, connected);

function connected(err) {
if (typeof(err) !== "undefined") {
// We have an error. Maybe the PLC is not reachable.
console.log(err);
process.exit();
}
conn.setTranslationCB(function(tag) {return variables[tag];}); // This sets the "translation" to allow us to work with object names defined in our app not in the module
conn.addItems(['TEST2']);

conn.readAllItems(valuesReady);	

}

function valuesReady(anythingBad, values) {
if (anythingBad) { console.log("SOMETHING WENT WRONG READING VALUES!!!!"); }
console.log(values);
doneReading = true;
if (doneWriting) { process.exit(); }
}

function valuesWritten(anythingBad) {
if (anythingBad) { console.log("SOMETHING WENT WRONG WRITING VALUES!!!!"); }
console.log("Done writing.");
doneWriting = true;
if (doneReading) { process.exit(); }
}`

The responce I get [525821,69071600] Initiate Called - Connecting to PLC with address and parameters:
mcprotocol.js:1234
[525821,69847000] { port: 1250, host: '192.168.3.250', ascii: false }
mcprotocol.js:1234
[525821,70405800] Connection cleanup is happening
mcprotocol.js:1234
[525821,71757800 192.168.3.250] Attempting to connect to host...
mcprotocol.js:1234
[525821,75067000 192.168.3.250] TCP Connection Established to 192.168.3.250 on port 1250
mcprotocol.js:1234
[525821,75850400] Translation OK
mcprotocol.js:1234
[525821,76619900 192.168.3.250] Adding TEST2
mcprotocol.js:1234
[525825,580196400 192.168.3.250] READ TIMEOUT on sequence number 2
mcprotocol.js:1234
SOMETHING WENT WRONG READING VALUES!!!!
MCprotocol.js:26
{TEST2: 'BAD 255'}

[plcpeople]

Can you please post the configuration of this port in GxWorks? This looks like it should work, although I do not have an FX5U PLC to test with.

[RobertMiller-KR2]

I was able to get a bit farther after adjusting some of the settings in the file (im using it in Fuxa) I'm also using a FX5UC. I have enabled 3E frames and set the ports in GXWorks3 (image below) I can now successfully read values at a sub 500ms rate! However when I try to write anything I get an error.

MCProfocol.js file attached

mcprotocol.js

[RobertMiller-KR2]

In order to remove any outside issues, I tested the code directly without Fuxa. You can see I simply edited it just a bit for the test items.

`var mc = require('mcprotocol');
var conn = new mc;
var doneReading = false;
var doneWriting = false;

var variables = { TEST1: 'D0,5' , TEST2: 'D0,1' // Read 5 words starting at D0 Write 1 Word At D0

}; // See setTranslationCB below for more examples

conn.initiateConnection({port: 1240, host: '192.168.3.250', ascii: false}, connected);

function connected(err) {
if (typeof(err) !== "undefined") {
// We have an error. Maybe the PLC is not reachable.
console.log(err);
process.exit();
}
conn.setTranslationCB(function(tag) {return variables[tag];}); // This sets the "translation" to allow us to work with object names defined in our app not in the module
conn.addItems(['TEST1','TEST2']);
conn.writeItems('TEST2', [ 666 ], valuesWritten); // You can write a single array item too.
conn.readAllItems(valuesReady);
}

function valuesReady(anythingBad, values) {
if (anythingBad) { console.log("SOMETHING WENT WRONG READING VALUES!!!!"); }
console.log(values);
doneReading = true;
if (doneWriting) { process.exit(); }
}

function valuesWritten(anythingBad) {
if (anythingBad) { console.log("SOMETHING WENT WRONG WRITING VALUES!!!!"); }
console.log("Done writing.");
doneWriting = true;
if (doneReading) { process.exit(); }
}`

I edited the mcprotocol.js with the following changes
self.isAscii = 0;
self.frame = '3E';

The image is the response...

[RobertMiller-KR2]

One more bit of info, writing to a device actually works, it seems the error is only in the response.

[RobertMiller-KR2]

Success! Kind of, temporarily until I understand the code a bit more (im not great with Java at all) I changed the line 1356 to writeResponse = theData.readUInt8(1); it was (9) The response I am getting from the PLC is only 2 bytes,

I am writing M100 and Toggling it so if its a 1 i write 0 if its a zero I write 1. Using Wireshark IT appears to send the following ( The data portion obviously changes if its a 1 or 0)
02ff0a0064000000204d010000

The response from that is
8200

I need to take more time and understand what command / subcommands you are using to request the data to know why it is responding this way. I'm guessing my temporary "Fix" may be ignoring any errors as it was reading and writing the values to the plc but was only having an issue with the response when writing.

I will keep you updated as I am also going to try to implement W registers.