West Control Solutions KS98-1 - Manual (Page 311)

III-21.2 Sampling intervals
The table opposite shows the sampling intervals for conversion
of the input signals into internal values and conversion of the
internal values into output signals (hardware conversion).
The sampling interval for software calculation of function
blocks AINP1, AINP3...AINP6, DINPUT, STATUS, CONST, LED,
INFO, OUT1...OUT5 and DIGOUT is 100 ms. Input or output Sampling interval
INP1 at intervals of 200 ms
INP3 / INP4 at intervals of 100 ms
INP5 at intervals of 800 ms
INP6 at intervals of 400 ms
di1...di12 at intervals of 100 ms
OUT1...OUT5 / do1...do6 at intervals of 100 ms
Calculation of the other function blocks is at equal intervals according to their allocation to the 8 time slots of 100 ms
each. Allocation of a block to one or several time slots (at intervals of 100, 200, 400 or 800 ms) is in the engineering.
For each block, the engineering tool provides an identification (ts) which can be used to determine the allocation from
the table opposite.
The total of calculation times of all required function blocks must be < 100 % for each time slot.
III-21.3 EEPROM data
Data are stored in non-volatile EEPROM. The manufacturers specify approx. 100 000 permissible write cycles per
EEPROM address, in reality, however, this value can mostly be exceeded by a multiple. If parameters and configura -
tions are changed exclusively manually, exceeding the max. number of write cycles is almost precluded. With digital
interface or automatic parameter changes, however, taking the maximum number of write cycles into account is indis -
pensable, and measures against excessively frequent parameter writing must be take
Function management 9499-040-82711
III-311 Sampling intervals
Time slot
ts 1 2 3 4 5 6 7 8 Sampling interval
11 f f f f f f f f at intervals of 100 ms
21 f f f f at intervals of 200 ms
22 f f f f at intervals of 200 ms
31 f f at intervals of 400 ms
32 f f at intervals of 400 ms
33 f f at intervals of 400 ms
34 f f at intervals of 400 ms
41 f at intervals of 800 ms
42 f at intervals of 800 ms
43 f at intervals of 800 ms
44 f at intervals of 800 ms
45 f at intervals of 800 ms
46 f at intervals of 800 ms
47 f at intervals of 800 ms
48 f at intervals of 800 ms