Converteam ALSPA MV3000e, Техническое руководство

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8. Menu 75 Parameters ALSPA PROFIBUS Field Bus Coupler
Page 8-4 Technical Manual (09/06)
1 On a loss of reference set a warning and carry on
running.
2 On a loss of reference trip the drive.
The warning code for loss of communications is 116, and the trip
code is 63.
Status flag 56 indicates whether Fieldbus communications are
healthy or not.
8.5.7 Freeze/Fallback Action P75.07
Switch S3-5 (see Section 3.3) must always be set to OFF. In this
condition, P75.07 determines the action taken by the drive if the link
to the PROFIBUS master fails. It affects what values are copied
into the Fieldbus reference parameters defined in Section 7.4.12. If
freeze is selected the parameter value freezes to the last good
received data. If fallback is selected, the associated fallback value
(refer to Table 8-7, parameters 75.07 to 75.21) is copied into the
appropriate references.
8.5.8 Control Words P75.08 & P75.10
The PROFIBUS board can provide a source for two control word
parameters. Control flags are explained in the Getting Started
Manual T1676, but basically allow control of such functions as
starting and stopping via a single bit in a 16-bit parameter. The two
control word parameters are capable of controlling 32 control flags.
Normally, only one word of 16 control flags would be sufficient,
leaving five words of set-point references. If more than 16 control
flags are needed, P75.10 can be used to hold a further 16 control
flags. While any of the received words can be mapped to this
parameter, it is recommended that the last word be used.
The description of how to map control flag parameters to the drive’s
control flags in Menus 33 and 34 is given in manual T1676, and in
more detail in the Software Technical Manual T1679. The control
flag parameters also have an option of a fallback value if a loss of
Fieldbus reference is declared.