Activity for DavidBo
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DavidBo modified a comment on discussion Runtime 🇬🇧
I have no problem with PiCAN2 but a script has to be called in order to enable the CAN bus before CODESYS !/bin/sh BITRATE=expr $2 \\* 1000 ifconfig $1 down echo ip link set $1 type can bitrate $BITRATE ip link set $1 type can bitrate $BITRATE ifconfig $1 up
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I have no problem with PiCAN2 but a script has to be called in order to enable the CAN bus before CODESYS
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I have no problem with PiCAN2
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I thought naively that by enabling the watchdog the Plclogic would be restarted when a timeout occur, but all I get is an exception and my task stops. How can I restart a task when a watchdog exception occur? I can see I can add an Event handler for an exception but which function should I call to restart my task or application?
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I make an application with a Visualization with a trace. It shows the temperature over time 10-20 min. I want by pushing a button reset the trace so it start a 0 again. How can I accomplish that?
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Are you using CANopen? Are sure that you can't configure the device to at least discard some of the messages in case a network failure. Is it possible to send a reset command to the device which clears the buffer?
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How do I configure a GPIO input port with a pullup or a pulldown resistor. Shall I do that with a python script?
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I am using a TextList where the ID is set to a name like timeID, volumeID or continousID. However if these names don't represent an integer, I cannot use the TextList in a "ComboBox for integers". A ComboBox for integers requires IDs like 0,1,2. So my question is how can I assign 0 to timeID and 1 to volumeID?
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I have the structure: TYPE Horse : STRUCT flow : ARRAY [0..1, 0..1] OF REAL; END_STRUCT END_TYPE Then I have a GVL with: VAR_GLOBAL flow_set : ARRAY [3..4] OF Horse:=[flow := [{1.6,2.4},{0.210,0.435}], flow := [{1.6,2.4},{0.210,0.435}]]; END_VAR I get the error message that flow is not defined. How do I initialize my structure and array correctly?
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I assume that ic2master somewhat is equivalent to: https://linux.die.net/man/8/i2cget However some devices also require a data address besides the chip-address. How can I specify that?
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I try to figure out how to use ac_datalog to log a value using sqlite as storage. CODESYS creates a file /var/opt/codesys/PlcLogic/ac_datalog/Application_DataLog.sqlite but as seen here it has no tables. Why? sqlite> .dbinfo database page size: 32768 write format: 1 read format: 1 reserved bytes: 0 file change counter: 12 database page count: 2 freelist page count: 1 schema cookie: 12 schema format: 4 default cache size: 0 autovacuum top root: 0 incremental vacuum: 0 text encoding: 1 (utf8) user...
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The timestamp used for alarm log is this: https://www.epochconverter.com/ldap But I dont know how to convert it using sqlite3. It make it diffecult to do a query
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I can read the alarmlog with sqlite3, but I don't understand the format and the meaning of the various tables. However, I think that the time is specified in milliseconds since January 1984. How can I make query which list the alarms formatted correctly? I assume I have a similar problem with AC_DataLog . It is of course fine that we can store values in a sqlite database, but it would be nice if we also could read these stored values.
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Hi campell The end user of my application is not using the IDE and can therefore not export it to a CSV file. Is it possible to do it from the application if the user for instance press a button? I want to clarify I want to log every time the temperature change 10%. For instance: 10.0 11.0 11.1 And so on. Is the Alarm and Event manager adequate for that?
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We are living in 2020 logging should be a trivial thing, but I am lost. I want to log the a temperature every time it has changed 10% or 1 degree from the desired value. I want the log to be cyclic, I want to store it an CSV file How do I do that? What shall I look for? Shall I use CmpLog.LOG_STD_LOGGER or maybe TrendRecording ?