Rockwell Automation 1756-XXXX ControlLogix Digital I/O Modules - Manual (Page 89)

Rockwell Automation Publication 1756-UM058G-EN-P - November 2012 89
Fast Module Features Chapter 5
3. On the New Module or Module Properties dialog box, click the
Configuration tab.
Timestamp fields only appear on the Configuration tab when you choose
Timestamp Data from the Input Data pull-down menu on the Module
Definition dialog box.
4. Complete the fields as described in the table below and click OK.
5. If you checked the Latch Timestamps checkbox, use program logic or the
RSLogix 5000 tag editor to acknowledge transitions and clear latched
timestamps via the Pt[
x].NewDataOffOnAck and
Pt[
x].NewDataOnOffAck output tags.
For more information about module tags, refer to Appendix B .
Field Description Configuration Tag
Enable COS/Timestamps
Off
→ On
To enable COS and timestamping for an Off to On transition for a
point, check the corresponding checkbox.
To disable COS and timestamping for an Off to On transition for a
point, clear the corresponding checkbox. Pt[x].COSOffOnEn
Enable COS/Timestamps
On
→ Off
To enable COS and timestamping for an On to Off transition for a
point, check the corresponding checkbox.
To disable COS and timestamping for an On to Off transition for a
point, clear the corresponding checkbox. Pt[x].COSOnOffEn
Latch Timestamps Check the checkbox to latch a CIP Sync timestamp for a COS
transition:
• When an initial timestamp is latched, timestamps for
subsequent COS transitions are dropped.
• Once a latched timestamp is acknowledged via the
corresponding bit in the Pt[x].NewDataOffOnAck or
Pt[x].NewDataOnOffAck tag, the timestamp is overridden
upon the next COS transition.
IMPORTANT: Timestamps are latched only for points that are
enabled for COS and timestamping.
LatchTimestamps