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Siemens Application Guide «Fire Mode» CM1A5192en_01
Building Technologies Essential Service Mode (in-depth information) 23.10.2007
6 Essential Service Mode (in-depth in-
formation)
• With V1.40 and higher, all SED2 errors and warnings will be ignored, the excep-
tion being hard errors, such as F0001, F0002, F0003, F0022 and F0023. These
hard errors can not be ignored since they could lead to the destruction of the
VSD. But they will be acknowledged an infinite number of times, if permitted by
the situation
• Another improvement is that the current limit warning will be ignored and that the
SED2 can reach the maximum output frequency, if required
• V1.40 now offers a new parameter with 2 indices: P1271(0) and P1271(1) with
so-called control words. These facilitate parameterization of the ESM function
(e.g. reversal of the motor’s direction of rotation in the event of fire). With the
former V1.30, the direction of rotation had to be reversed with a separate digital
input, for example, or with a special internal connection. The control words take
on priority when ESM is activated. They have no impact on normal operation.
The new parameter is also described in the Commissioning Guide (CM1G5192).
They are enclosed with the SED2.
• In ESM, automatic restart (P1210) is automatically set to 6, independent of the
setting used in normal operation. This means that in the case of hard errors,
such as F0001 (overcurrent) or F0002 (overvoltage), continuous acknowledge-
ments will be made and SED2 restarts initiated. For a detailed description of
automatic restarts, refer to CM1G5192en, SED2 Variable Speed Drives, Com-
missioning Guide, Chapter 6.10 Automatic Restart. Setting 6 ensures the high-
est possible level of availability of the SED2 when operating in ESM.
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