Parameters > Citect.ini File Parameters > Trend Parameters > [Trend]BlockByIODevice


Note: This parameter is obsolete. From version 7.0, trend data from a device is no longer blocked by the Trend Server, but instead is blocked by the I/O device. Trend tags are automatically updated with trend data.

Setting this parameter to 1 commands that if I/O problems (e.g. with hardware, the I/O device, or the communications link) resulted in gaps for one trend tag, other trend tags were unaffected.

Leaving this parameter set to 0 meant that one trend tag with gaps could cause gaps for all trend tags.

Allowable Values:

Default Value: 1

See Also