Specifications

Counting IP 240
Note
In the standard function blocks, scratch flags and system data areas are used for
data interchange with the IP 240 ( Technical Specifications for the FBs).
You must
• save these scratch flags and data areas at the beginning of the interrupt service
routines for the S5-115U and S5-135U (when interrupt servicing after each
statement is enabled) and for the S5-155U (155U mode) and reload them at the
end of these routines.
• save these flags and data areas in the restart routines for manual or automatic
restart (OB21/OB22) in the S5-135U (basic setting for restart mode) and S5-
150U and reload them at the end of these routines.
Technical Specifications
Block number : 172
Block name : STEU. DOS
PLC Library number
Call length/
Block length
CPU
Processing time
Function
1234
S5-115U P71200-S 5172-D-2 5 words /
680 words
941-7UA...
942-7UA...
943-7UA...
944-7UA...
approx. 38 18 24 24 ms
approx. 20 10.5 13 13 ms
approx. 12.5 6.2 8.2 7.0ms
approx. 2.8 2.5 2.6 2.7ms
941-7UB...
942-7UB...
943-7UB...
944-7UB...
approx. 11 6.0 7.4 6.0ms
approx. 2.1 1.6 1.9 2.2ms
S5-135U/
S5-155U
P71200-S 9172-D-2 5 words/
1110 Worte
922 from A9
928-3UA...
approx. 10 6.0 7.6 7.0ms
approx. 6.0 3.5 4.2 4.2ms
928-3UB... approx. 2.2 1.8 1.9 2.0ms
S5-150U P71200-S 4172-D-1 5 words/
1054 words
approx
. 1.9 1.2 1.4 1.6ms
S5-155U P71200-S 6172-B-1 5 words/
1311 words
946-3UA.../
947-3UA...
approx. 2.2 1.6 2.0 1.8ms
Nesting depth : 0
Subordinate blocks : S5-115U OB160 (only CPUs ...-7UB...)
S5-135U OB122
S5-155U OB91, OB122
Assignments in data area : data block specified with DBNR parameter up to and
including DW 35
Assignments in flag area : MB 240 to 255
System statements : yes
1
The specified processing times are for an FB call following an IP 240 firmware cycle without data interchange. Note
that
• following reading out of data from the IP 240, no further data interchange is possible in the current cycle.
• following the writing of new data to the IP 240, no further data interchange is possible in the current or in the
next cycle.
8-12 EWA 4NEB 811 6120-02a