Siemens SIMATIC S5 CP 523 Manual page 147

Communications Mode
Transfer parameter setting data for parameter block 9
Byte
0 Job number
"Transfer parameter setting data"
1 Bits 4 to 7: Parameter block number
Bits 0 to 3: Sign for correction value
2+3 Correction value (s/month)
4 to 7 Not significant
Example: Transferring parameter setting data for parameter block 9
You have discovered that the clock loses 12 seconds in 4 days, which totals to 90 seconds in 30 days.
The correction value is thus 90 s/month.
STL OB 22
:JU FB
NAME : SYNC**
:JU FB
NAME :BLOCK9
:BE
* 5.2
** FB 99 waits until the CP 523 can accept job requests ( 4.1)
7-42
Description
0
1 negative
STL FB 117
99 NAME :BLOCK9
:L
117 :T
:L
:T
:BE
Possible Values
90
9
positive 0
1
0 to 400
D
-
Load correction value into ACCUM 1 and
KF +90
transfer to CP in bytes 2 and 3
PW 130
Load job number and parameter block
KH 9090
number into ACCUM 1 and transfer to CP
PW 128*
in bytes 0 and 1
Default Values
on the CP 523
-
H
H
-
H
H
0000
D
-
Description
EWA 4NEB 811 6044-02a
CP 523
D