Data Logger Function Block - ABB DCS 500B Description

• Data Logger
DATA LOGGER func-
tion block
DCS 500 Software Description
DCS500B also includes a datalogger for measurements. Data log-
ger has six logging channels. The capacity of each channel is 1000
samples.
Data logger consists of six logging channels
DLOG1.[IN] (601)
DLOG2.[IN] (602)
DLOG3.[IN] (603)
DLOG4.[IN] (604)
DLOG5.[IN] (605)
DLOG6.[IN] (606)
The capacity of each channel is 1000 samples. These channels can
be used to collect fast incidents from the DCS500B within a certain
time. The total collection time (1...1000s) can be set with a sampling
interval parameter DLOG.SAMPL INT (610) (1...1000ms). This
collection time is common for all the channels.
Channels can be examined in graph/numeric form with the
CMT/DCS500 Tool.
Selection of the parameter/signal index to be sampled in the data
logger channels 1...6 is made by setting the index to the desired
connection point DLOG1.[IN] (601) ... DLOG6.[IN] (606).
Selection of the trigger condition is made by means of the parame-
ter DLOG.TRIGG COND (607) as follows:
0 = external triggering
1 = fault + external triggering
2 = triggers when the difference between two successive values of
data logger channel 1 is larger than the value defined in
DLOG TRIGG VALUE (608)
3 = triggers when the value in data logger channel 1 exceeds the
value which is defined in DLOG TRIGG VALUE (608)
4= triggers when the value in data logger channel 1 falls below the
value which is defined in DLOG TRIGG VALUE (608).
Note! Function blocks can be used to generate more complex trig-
gering conditions.
Number of samples after triggering can be defined by means of
parameter DLOG.TRIGG DELAY (609), 0 ... 1000.
Functional Software description
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