Access the CST object

The coordinated system time (CST) object provides coordinated system time for the devices in one chassis.
Attribute
Data Type
Instruction
Description
CurrentStatus
INT
GSV
Current status of the coordinated system time. Each bit has a specific meaning:
  • 0. Timer hardware faulted. The internal timer hardware of the device is in a faulted state.
  • 1. Ramping enabled. The current value of the timer’s lower 16+ bits ramp up to the requested value, rather than snap to the lower value.
  • 2. System time master. The CST object is a master time source in the ControlLogix system.
  • 3. Synchronized. The CST object’s 64-bit CurrentValue is synchronized by master CST object via a system time update.
  • 4. Local network master. The CST object is the local network master time source.
  • 5. Relay mode. The CST object is acting in a time relay mode.
  • 6. Duplicate master detected. A duplicate local network time master is detected. This bit is always 0 for time-dependent nodes.
  • 7. Unused.
  • 8-9. 00. Time dependent node.
  • 01. Time master node.
  • 10. Time relay node.
  • 11. Unused.
  • 10-15. Unused.
CurrentValue
DINT[2]
TIME32[2]
TIME
GSV
Current value of the timer. DINT[0] contains the lower 32; DINT[1] contains the upper 32 bits. The timer source is adjusted to match the value supplied in update services and from local communication network synchronization. The adjustment is either a ramping to the requested value or an immediate setting to the request value, as reported in the CurrentStatus attribute.
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