Parameter Assignment - Siemens SIMATIC S7 Equipment Manual
Ultrasonic position encoding module
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Also See for SIMATIC S7:
- System manual (866 pages) ,
- Functional safety manual (212 pages) ,
- User manual (134 pages)
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Operation
5.1
Parameter Assignment
Automatic parame-
ter assignment
Parameter assign-
ment via CPU
5-2
Parameter assignment sets the SM 338 module to the connected sensors.
There are three ways to assign parameters to the SM 338.
Automatic parameter assignment
S
Parameter assignment by the CPU during startup (SDB 100)
S
Parameter assignment via SFC during operation
S
Transferred parameters are always subject to a plausibility check. The fol-
lowing checks are performed.
Number of counters used < 8
S
Number of measuring points per sensor < 4
S
Each counter only used once
S
If the module was not parameterized by the CPU after conclusion of initiali-
zation and release, the parameters are assigned automatically.
The following default values are loaded (see table 4-4).
One measuring point per sensor
S
Greatest measuring cycle time
S
Sensors operate asynchronously.
S
Lowest resolution (i.e., greatest measuring range)
S
End-of-cycle and diagnosis alarm disabled
S
Channel-related diagnostics and wire break monitoring disabled
S
Parameter assignment is performed by the CPU during startup (after every
transition from STOP to RUN).
The parameter information is taken from the SDB 100 system data block and
transferred to the module.
Requirements:
SDB 100 exists.
S
SDB 100 contains appropriate parameter information for all slots which
S
have been used.
Type identifier in the parameter record matches the type identifier of the
S
module.
SM 338 Equipment Manual
(4) J31069-D401-U1-A0-7618
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