DLG (data log)
The DLG instruction writes variable values from the runtime engine into a data logging file on an SD card.
When writing to a data log, a maximum of 50 group folders are allowed each day. Each group folder has a maximum of 50 files, with a file size from 4k through 8k.
Languages supported: Function block diagram, ladder diagram, structured text.
This instruction applies to the L20E, L50E, and L70E controllers.
DLG
Parameter | Parameter Type | Data Type | Description |
|---|---|---|---|
Enable | Input | BOOL | Data logging write enable.
|
TSEnable | Input | BOOL | TRUE: Date and time stamp logging enable flag. |
CfgID | Input | USINT | Data logging configuration VA ID number 1-10. |
ENO | Output | BOOL | Enables output. Applies to ladder diagram programs. |
Status | Output | USINT | Current status of the instruction. Data logging Status codes:
|
ErrorID | Output | UDINT | A unique numeric error code for DLG. |
DLG error codes
Error code | Error Name | Comments |
|---|---|---|
0 | DLG_ERR_NONE | No error. |
1 | DLG_ERR_NO_SDCARD | SD card is absent. |
2 | DLG_ERR_RESERVED | Reserved. |
3 | DLG_ERR_DATAFILE_ACCESS | Access data logging file error. |
4 | DLG_ERR_CFG_ABSENT | Data logging configuration file is absent. |
5 | DLG_ERR_CFG_ID | Configure ID is absent in the data logging configuration file. |
6 | DLG_ERR_RESOURCE_BUSY | The data logging operation linked to this data logging ID is used by another FB operation. |
7 | DLG_ERR_CFG_FORMAT | Data logging configuration file format is not valid. |
8 | DLG_ERR_RTC | Real-time clock is not valid. |
9 | DLG_ERR_UNKNOWN | An unspecified error has occurred. |
DLG examples
DLG function block diagram example
DLG ladder diagram example
DLG structured text example
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