TIME constants are used to operate the standard timer modules. The time constant TIME is of size 32 bit and matches the IEC 61131-3 standard. Additionally, LTIME is supported as an extension to the standard as time base for high-resolution timers. LTIME is of size 64 bit and resolution nanoseconds.
The library standard64.lib provides functions for WSTRING strings.
t#<time declaration>
Instead of t#, you can also use the following:
oT#
otime
oTIME
The time declaration can include the following time units. They have to be used in the following sequence, but it is not required to use all of them.
od: days
oh: hours
om: minutes
os: seconds
oms: milliseconds
Examples of correct TIME constants in an ST assignment
|
Example |
Description |
|---|---|
|
TIME1 := T#14ms; |
– |
|
TIME1 := T#100S12ms; |
(* The highest component may be allowed to exceed its limit *) |
|
TIME1 := t#12h34m15s; |
– |
Examples of incorrect usage
|
Example |
Description |
|---|---|
|
TIME1 := t#5m68s; |
(* limit exceeded in a lower component *) |
|
TIME1 := 15ms; |
(* T# is missing *) |
|
TIME1 := t#4ms13d; |
(* incorrect order of entries *) |
LTIME#<time declaration>
The time declaration can include the time units as used with the TIME constant and additionally:
ous: microseconds
ons: nanoseconds
Examples of correct LTIME constants in an ST assignment:
LTIME1 := LTIME#1000d15h23m12s34ms2us44ns
LTIME1 := LTIME#3445343m3424732874823ns
For further information, refer to the description of the TIME data types.
