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Siemens SIMATIC S7-1200 - Page 106

Siemens SIMATIC S7-1200
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Programming made easy
6.3 Powerful instructions make programming easy
Easy Book
106 Manual, 03/2014, A5E02486774-AF
Table 6- 11 TOF (OFF-delay timer)
LAD / FBD
SCL
Timing diagram
"timer_db".TOF(
IN:=_bool_in_,
PT:=_undef_in_,
Q=>_bool_out_,
ET=>_undef_out_);
Table 6- 12 TONR (ON-delay Retentive timer)
LAD / FBD
SCL
Timing diagram
"timer_db".TONR(
IN:=_bool_in_,
R:=_bool_in_
PT:=_undef_in_,
Q=>_bool_out_,
ET=>_undef_out_);
Table 6- 13 Preset timer -(PT)- and Reset timer -(RT)- coil instructions
LAD
Description
Use the Preset timer -(PT)- and Reset timer -(RT)- coil instructions with either box or coil timers. These
coil instructions can be placed in a mid-line position. The coil output power flow status is always the same
as the coil input status.
When the -(PT)- coil is activated, the PRESET time element of the specified IEC_Timer DB data is set
to the "PRESET_Tag" time duration.
When the -(RT)- coil is activated, the ELAPSED time element of the specified IEC_Timer DB data is
reset to 0.

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