Siemens SINUMERIK 808D ADVANCED Commissioning Manual page 155

Timers (T)
Form
Condition of timer: T3 and T25 - represent the comparison result of timer value and preset value
Type
● On-delay timer TON: IN = 1 starts timing; IN = 0 resets timer; timer value > preset value; Tn = 1
● Off-delay timer TOF: IN = 1 resets timer; IN = 0 starts timing; timer value > preset value; Tn = 0
● Retentive delay timer CTUD: IN = 1 starts timing; IN = 0 stops timing; timer value > preset value; Tn = 1
Assigning value "0" to T resets the timer.
Variable access rights
[r] You can "read only" the designated area.
[r/w] You can "read and write" the designated area.
Data format information
1 BIT
8 BYTE
16 INT/WORD
32 DINT/DWORD/REAL
Note
All of the empty fields in the user interface are reserved for Siemens and may neither be written to nor be evaluated.
Fields designated with "0" always have the value "logical 0".
If there is no data format information, you can read or write to all the specified data formats.
Commissioning Manual
01/2017
155