R 02/92
Technical Specifications
8.3
Time Requirements
1. Power On
The SP bit appears after turn-on or return of thevoltagetothe control. After
approx.
100
psecthe
SP bit can be scanned by the S5 unit. Its status is “l” until the module is ready to permit write
commands (memory initialization). Now the module can be parameterized (i.e., the initial and end
setpoints
and interrupt identifiers must be allocated to the 32 tracks of the two channels).
When operating with standard function blocks, this is automatically considered.
2. Parameter Assignment
For the transmission of a
setpoint,
the
1P
241 processor requires
8
msec
Example:
For channel 1 with 4 cams set and channel 2 with eight cams set, the total time
required is 12x 2 x 8
msec
= 192
msec.
This means, the total time required for parameterization of
8
msec
x 32
setpoints
(initial value)
8
msec
x 32
setpoints
(end value)
=
256
msec
= 256
msec
———————
———
Total time Z = 512
msec
3. Processing Time
The processing times in this section refer to a comparison of the setpoint with
the actual value.
If identical
setpoints
are used for several tracks, the matching number of com–
parisons is required.
3.1 Encoder Matching Module (Incremental)
Typical processing time per
setpoint/actual
value comparison
3.2 Encoder Matching Module Absolute 1 (Excess–3 Gray)
Typical processing time per
setpoint/actual
value comparison
1
msec
1
msec
1P
241 Equipment Manual
@
Siemens
AG
1989, Order No.:
6ES5
998-0KD21
8–3
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