Scan Modes

OIBus uses Cron-defined scan modes to schedule when South connectors retrieve or when North connectors send data. Scan modes allow you to automate data operations at specific dates and intervals.

Default Scan Modes

OIBus provides six built-in scan modes for common scheduling needs:

Scan Mode	Cron Expression	Description
Every second	* * * * * *	Runs every second.
Every 10 seconds	/10 * * * * *	Runs every 10 seconds.
Every minute	0 * * * * *	Runs every minute at the 0-second mark.
Every 10 minutes	0 /10 * * * *	Runs every 10 minutes at the 0-second mark.
Every hour	0 0 * * * *	Runs every hour at the 0-minute, 0-second mark.
Every 24 hours	0 0 0 * * *	Runs daily at midnight (00:00:00).

Custom Scan Modes

You can create custom scan modes to fit your specific scheduling requirements:

1. Add a new scan mode: Name it and specify a valid Cron expression.
2. Test your Cron expression: Use tools like crontab.cronhub.io to validate your expression before saving.

Tips for Cron Expressions

• Format: Cron expressions consist of six fields: [seconds] [minutes] [hours] [day of month] [month] [day of week].
• Wildcards: Use * to match any value (e.g., * * * * * * for every second).
• Intervals: Use / to specify intervals (e.g., /10 for every 10 seconds).
• Precision: For predictable behavior, specify exact seconds or minutes (e.g., 0 for the top of the minute/hour).

Example Cron Expressions

• 30 * * * * *: Runs at the 30-second mark of every minute.
• 0 15 10 * * *: Runs daily at 10:15:00 AM.
• 0 0 22 * * 1: Runs every Monday at 10:00:00 PM.

Test Your Cron Expression

Cron Expression Tester

Description:

Next runs (simulated):