Siemens S7-1200 - Page 225

Basic instructions
7.3 Counter operations
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
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5. Click OK. The counter instruction appears in the editor with type INT for the preset and
count value, and the IEC_COUNTER structure appears in the FB Interface under Static.
6. If desired, change the type in the counter instruction from INT to one of the other types.
The counter structure will change correspondingly.
7. Open the block that will use this FB.
8. Place this FB at the desired location. Doing so results in the creation of an instance data
block for this FB.
9. Open the instance data block created when you placed the FB in the editor.
10.Under Static, locate the counter structure of interest. In the Retain column for this counter
structure, check the box to make this structure retentive.
Type sho
wn in counter instruction (for preset
and count values)
Corresponding structure Type shown in FB
interface
INT
IEC_Counter
SINT
IEC_SCounter
DINT
IEC_DCounter
UINT
IEC_UCounter
USINT
IEC_USCounter
UDINT
IEC_UDCounter