Siemens SIMATIC S5 - Page 113

Technical Specifications
5. Modifying Setpoints
The transfer of a setpoint for each parameterized initial or end value takes
8
msec x 32 (maximum initial values for 2 channels)
8 msec x 32 (maximum end values for 2 channels)
---
R 02/92
8 msec
= 256 msec
= 256 msec
-------
x
= 512 msec
6. Zero Shift (Incremental Encoders)
For a zero shift (i.e., synchronization of the module), a certain time period per channel is required
for updating the result bits. This time requirement for each specified initial or end value (consider
parallel operation) is
1 msec
7. Special Functions
Activation of the “verify–read” and “calculate average value” special functions increases time
requirements as shown below.
Verify-read
100
WS x number of “incorrect” read procedures @
Calculate average value
100
ps x number of actual values for
“calculate average value” @
8. First Start-Up (Worst Case)
For a complete start-up the worst case conditions apply. Time from turning on the power supply
until the interrupts and track identifier bits are correctly set:
a) maximum time required for parameter assignment
8
msec x 32 initial values
= 256 msec
8
msec x 32 end values
= 256 msec
b) maximum time required for
binary/BCD conversion
13 msec x 32 initial values
= 416 msec
13
msec x 32 end values
= 416 msec
—--—-——
— --
Worst case
X = 1344 msec
El
.:; ::::
llli
,,,,
.~:
These time characteristics must be considered during configuring.
,.
8–6
1P 241 Equipment Manual
@ siWIW31M AG 1989, Order No.: 6ES5 998-0KD21
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