ABB Freelance 2000, Руководство пользователя

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Section E Logs
E-6
E 1.3 Logs in an operator station
A maximum of four operation logs, four disturbance course logs, one signal sequence log 1
and three signal sequence logs N can be set up for each operator station. (The display and op-
eration of the logs on an operator station is described in the manual DigiVis Operation and Ob-
servation ).
The various logs are all programs in the operator station resource of the project tree. Logs can be
set up, deleted, moved and copied in the project tree.
E 1.4 Squence of events
In certain applications there is a requirement to log selected binary signals with a time stamp in
correct chronological order.
In order to achieve this end, the 'Time stamp' function must first be activated in a DDI 01 module
(see
Engineering Manual , System Configuration , Hardware Structure ). When this function is
activated, an extra binary value and time value for each channel are made available at the output
of this hardware block in addition to the 'standard' 32 binary outputs. When there is an edge
change of the binary value on these outputs, the current value and the associated time (resolution
= update cycle of the module) are stored for each channel.
In an FBD program a function block ‘Sequence of events monitoring M_SOE’ must be configured
(see
Engineering Reference Manual , Functions and Function Blocks , Monitoring Function
Blocks ). This block can be used to transfer binary values with time stamp of a DDI 01 to a signal
sequence log. In addition, during parameterization a DDI 01 block is assigned to this block, and
the channels to be monitored are defined.
With each cycle of the user task the binary values and time stamps of the DDI 01 block are read.
When the stored binary values are read and time-stamped, the timestamp function in the DDI 01
module is re-activated, i.e. the next edge change of this binary value can be detected and stored.
For each change of value of a monitored channel that is detected in the M_SOE function block, a
message is generated using the binary value and the associated time stamp; this signal can then
be processed further in the signal sequence logs.
These messages are not displayed in the DigiVis message line or message list .
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