User Manual

CM2U8567E / 04.1999 VISONIK DCS Functions and System Messages VVS18 Siemens Building Technologies
3-128 System Messages --- DCS Messages Landis & Staefa Division
vv[TXU]; OFLM: xx[TXU]; yy NAME .....
LSP LS 00:00:00 NAME
vv[TXU]; OFLM: xx[TXU]; yy NAME
-> (M.LIM2)
Automatic switching Insufficient
Additional Switch-off by Hand zz[TXLSU]
LSP LS 00:00:00 $1'000 131 kWh; OFLM: 129 kWh; k.o.
$1'000 Automatic switching Insufficient
Additional switch-off by Hand 31 kWh
The peak demand program has difficulties.
vv = Parameter LS (with units)
xx = Currently valid switch-off limit
yy = ERSTA (as text:
'k.o.' for 'knocked out')
zz = Load (with units), that still has to be shed by the LS program so that the
demand peak remains within the allowed range.
The messages appear on terminals that are defined in the DEVLS parameter of the
LS point.
When this message appears it means that the peak demand program has shed all the
load available to it in accordance with the LSP catalogue. It, however, must shed an
additional zz amount of load in order to reach the desired level.
Short term action:
The plant operator can manually reduce or switch off some plant so that the demand
sinks below the value required by the LSP catalogue. The operator alone is responsible
for reconnecting such loads.
If the operator takes no action, there is no guarantee that the LSP program target will be
met.
Long term action:
The peak demand program moves to the 'k.o. situation' because it has to shed more
load than is allowed by the peak demand catalogue. If the message occurs frequently,
the operator should try to adapt to the situation by making additional entries in the peak
demand catalogue.
The LS parameter LSL can be used to suppress 'k.o. situations or the above message
provided z < LSL.
Example
Explanation
Action