Wallclocktime Attributes - Allen-Bradley Logix5000 Reference Manual

Attribute Data Type
MinimumInterval DINT[2]
Name String
OverlapCount DINT
Priority INT
Rate DINT
StartTime DINT[2]
Status DINT
Watchdog DINT
Attribute Data Type
ApplyDST SINT
CSTOffset DINT[2]
CurrentValue DINT[2]
Instruction Instruction
within within
Standard Safety Task
Task
GSV None
SSV
GSV GSV
GSV GSV
SSV SSV
GSV GSV
SSV
GSV GSV
SSV
GSV None
SSV
GSV None
SSV
GSV GSV
SSV

WallClockTime Attributes

The WallClockTime object provides a timestamp that the controller can use for
scheduling.
Instruction Description
GSV Identifies whether to enable daylight savings time.
SSV Value
0
non zero Adjust for daylight savings time
GSV Positive offset from the CurrentValue of the CST object (coordinated system time, see
page
SSV
32 bits of the value. Value in
GSV Current value of the wall clock time. DINT[0] contains the lower 32 bits of the value;
DINT[1] contains the upper 32 bits of the value. The value is the number of
SSV
microseconds that have elapsed since 0000 hours 1 January 1972. The CST and
WALLCLOCKTIME objects are mathematically related in the controller. For example, if
you add the CST CurrentValue and the WALLCLOCKTIME CTSOffset, the result is the
WALLCLOCKTIME CurrentValue.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Input/Output Instructions (MSG, GSV, SSV, IOT)
Description
The minimum time interval between successive executions of the task. DINT[0]
contains the lower 32 bits of the value; DINT[1] contains the upper 32 bits of the
value. A value of 0 indicates 1 or less executions of the task.
Name of the task.
Number of times that the task was triggered while it was stil l executing. Valid for
an event or a periodic task. To clear the count, set the attribute to 0.
Relative priority of this task as compared to the other tasks. Valid values 0...15.
The time interval between executions of the task. Time is in microseconds.
Value of WALLCLOCKTIME when the last execution of the task was started.
DINT[0] contains the lower 32 bits of the value; DINT[1] contains the upper 32
bits of the value.
Status information about the task. Once the controller sets one of these bits, you
must manually clear the bit.
Bit Meaning
0 An EVENT instruction triggered the task (event task only)
1 A timeout triggered the task (event task only)
2 An overlap occurred for this task
Time limit for execution of all programs associated with this task. Time is in
microseconds.
If you enter 0, these values are assigned:
Time Task Type
0.5 sec Periodic
5.0 sec Continuous
Meaning
Do not adjust for daylight savings time
202). DINT[0] contains the lower 32 bits of the value; DINT[1] contains the upper
μ
s. The default is 0.
Chapter 4
211