ABB Relion 650 Series REB650, Technical Manual

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• applicable to long time integration (≤999 999.9 seconds)
• output ACCTIME presents integrated value in seconds to all tools
• integrated value is retained in non-volatile memory, if any warning, alarm
or overflow occurs
• any retained value with a warning/alarm/overflow shall be available as the
initiation value for the integration followed by a restart.
• RESET: Reset the integration value. Consequently all other outputs are also reset
•
unconditionally on the input IN value
• reset the value of the non-volatile memory to zero.
• BLOCK: Freeze the integration and block/reset the other outputs
•
unconditionally on the signal value
• BLOCK request overrides RESET request.
• Monitor and report the conditions of limit transgression
•
overflow if output ACCTIME > tOverflow
• alarm if ACCTIME > tAlarm
• warning if ACCTIME > tWarning .
The ACCTIME output represents the integrated time in seconds while tOverflow ,
tAlarm and tWarning are the time limit parameters in seconds.
tAlarm and tWarning are user settable limits. They are also independent, that is, there
is no check if tAlarm > tWarning .
tAlarm and tWarning are possible to be defined with a resolution of 10 ms, depending
on the level of the defined values for the parameters.
tOverflow is for the overflow supervision with a default value tOverflow = 999 999.9
seconds. The outputs freeze if an overflow occurs.
11.9.6.1 Operation Accuracy
The accuracy of TEIGGIO depends on essentially three factors
• task cycle time
• the pulse length
• the number of pulses, that is the number of rising and falling flank pairs
In principle, a shorter task cycle time, longer integrated time length or more pulses
may lead to reduced accuracy.
11.9.6.2 Memory storage
The value of the integrated elapsed time is retained in a non-volatile memory, only if
any warning, alarm or/and overflow occurs. Consequently there is a risk of data loss
in the integrated time at a power failure.
Section 11
1MRK 505 288-UEN A
Logic
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Technical manual