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Profibus Communication
B.8 Device Database File (GSD)
SITRANS F M TRANSMAG 2
100
Operating Instructions, 11/2009, A5E00102775-07
Note
The consistency in the parameters between the device and the control system is decisive
for correct interpretation of the cyclic measured values. In current operation, the local
operating lock (menu 6.2) or "WRITE_LOCKING" should therefore be activated by
PROFIBUS.
● Hardware write protection:
A write protection by hardware components is not implemented; the PROFIBUS
parameter "HW_WRITE_PROTECTION" is not significant.
● Locking of local operation
Local operation can be locked by the PROFIBUS parameter "LOCAL_OP_ENABLE":
– 0: The local operation is completely locked, the last valid display state is retained.
In the event of a communication failure of more than 30 s, the local operation lock is
cancelled automatically until communication is recovered.
– 1: Local operation is released.
This function may be restricted under certain circumstances by write protection
"WRITE_LOCKING" or local operation lock (personal PIN, menus 6.1 and 6.2).
B.8
Device Database File (GSD)
The device database file (GSD) is used to configure the format and order of the cyclic data.
The acyclic parameter "IDENT_NUMBER_SELECTOR" must be set to select the GSD (0 =
profile GSD, 1 = manufacturer-specific GSD = factory setting). This can also be done on the
local operating unit under menu item 4.1.2.
The GSD lists all permissible identifiers for every measured value (= module). They can be
freely combined with the restriction that only one identifier may be used per module and the
order of the identifiers must be the same as the order of modules. At least one measured
value must be requested, i.e. the number of identifiers must be at least 1 and 4 at the most.
The formats "resettable quantity" and "quantity" are accepted for the totalizer modules. The
identifiers are checked independently of each other, i.e. when polling several measured
values, combinations with different formats are permissible.
The order of measured values specified in the GSD is defined in the cyclic telegram and
cannot be changed (see also section 5.4.1). If one of the four measured values is omitted,
"Free Place" must be specified as an identifier.
Rules are stored in the GSD for use in the "SIMATIC S7/HW-Config" control system which
prevent wrong configuration.
Note
As an alternative to the device-specific GSD, standard GSD for magnetic-inductive flow
transmitters described in profile 3.0 can also be used, but does not support the
manufacturer-specific extensions.
Содержание SITRANS F M TRANSMAG 2
Страница 1: ...Electromagnetic Flowmeters SITRANS F M TRANSMAG 2 Operating Instructions 11 2009 SITRANS F ...
Страница 2: ......
Страница 10: ...Safety notes 2 2 Laws and directives SITRANS F M TRANSMAG 2 8 Operating Instructions 11 2009 A5E00102775 07 ...
Страница 14: ...Description 3 4 BUS Communication SITRANS F M TRANSMAG 2 12 Operating Instructions 11 2009 A5E00102775 07 ...
Страница 40: ...Commissioning 6 4 Operating examples SITRANS F M TRANSMAG 2 38 Operating Instructions 11 2009 A5E00102775 07 ...
Страница 92: ...Parameters SITRANS F M TRANSMAG 2 90 Operating Instructions 11 2009 A5E00102775 07 ...
Страница 108: ...Profibus Communication B 9 Literature list SITRANS F M TRANSMAG 2 106 Operating Instructions 11 2009 A5E00102775 07 ...
Страница 110: ...Appendix C 2 Accessories and spare parts SITRANS F M TRANSMAG 2 108 Operating Instructions 11 2009 A5E00102775 07 ...