Specifications

IEC 1131-3 Instructions
10-13
S7-200 Programmable Controller System Manual
C79000-G7076-C233-01
Understanding the IEC 1131-3 Timer Instructions
TON, TOF and TP timers are available in three resolutions. The resolution is
determined by the timer number and is shown in Table 10-3. Each count of the
current value is a multiple of the time base. For example, a count of 50 on a 10-ms
timer represents 500 ms.
Table 10-3 Timer Numbers and Resolutions
Timer Type
Resolution in
milliseconds (ms)
Maximum Value
in seconds (s)
Timer Number
TON, TOF,
TP
1 ms 32.767 s T32, T96
TP
10 ms 327.67 s T33 to T36, T97 to T100
100 ms 3276.7 s T37 to T63, T101 to T255
Note
You cannot share the same timer numbers for TOF, TP, and TON. For example,
you cannot have both a TON T32 and a TOF T32.
On-Delay Timer Example
LAD
Input
Input
Timing Diagram
VW100 (current)
Output (Q)
PT3
IN
TON
T33
PT = 3
FBD
PT
3
IN
TON
Q
ET
Q
ET %VW100
Output
%VW100
Output
Input
PT = 3
T33
Figure 10-3 Example of On-Delay Timer for LAD and FBD