Basler BE1-CDS220, Инструкция по эксплуатации

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4-34 Protection and Control BE1-CDS220
Retrieving Breaker Failure Status from the Relay
The status of each logic variable can be determined from the ASCII command interface using the RG-
STAT (report general-status) or the RL (report logic) commands. See Section 6,
Reporting and Alarm
Functions, General Status Reporting, for more information.
LOGIC TIMERS
62 - General Purpose Logic Timers
BE1-CDS220 relays provide two general-purpose logic timers, which are extremely versatile. Each can be
set for one of five modes of operation to emulate virtually any type of timer. Each function block has one
output (62 or 162) that is asserted when the timing criteria has been met according to the BESTlogic
mode setting. Figure 4-30 shows the 62 function block as an example. Each mode of operation is
described in detail in the following paragraphs.
Figure 4-30. General Purpose Logic Timers Logic Block
An INI (initiate) logic input is provided to start the timing sequence.
A BLK (block) logic input is provided to block operation of the timer. When this expression is TRUE, the
function is disabled.
Each timer has a T1 time setting and a T2 time setting. The functioning of these settings is dependent
upon the type of timer as specified by the mode setting in BESTlogic.
If the target is enabled for the function block, the target reporting function will record a target when the
timer output is TRUE and the fault recording function trip logic expression is TRUE. See Section 6,
Reporting and Alarm Functions, Fault Reporting , for more details on the target reporting function.
Mode 1, PU/DO (Pickup/Dropout Timer)
The output will change to logic TRUE if the INITIATE input expression is TRUE for the duration of
PICKUP time delay setting T1. See Figure 4-31. If the initiate expression toggles to FALSE before time
T1, the T1 timer is reset. Once the output of the timer toggles to TRUE, the
INITIATE input expression
must be FALSE for the duration of DROPOUT time delay setting T2. If the INITIATE input expression
toggles to TRUE before time T2, the output stays TRUE and the T2 timer is reset.
D2843-08
10-23-03
Figure 4-31. Mode 1, PU/DO (Pickup/Dropout Timer)