ABB REL670 2.2 IEC, Applications Manual

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17.5.1.2 Setting guidelines
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Operation : On or Off
17.6 Configurable logic blocks
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The configurable logic blocks are available in two categories:
• Configurable logic blocks that do not propagate the time stamp and the quality
of signals. They do not have the suffix QT at the end of their function block
name, for example, SRMEMORY. These logic blocks are also available as part
of an extension logic package with the same number of instances.
• Configurable logic blocks that propagate the time stamp and the quality of
signals. They have the suffix QT at the end of their function block name, for
example, SRMEMORYQT.
17.6.1 Application
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A set of standard logic blocks, like AND, OR etc, and timers are available for
adapting the IED configuration to the specific application needs. Additional logic
blocks that, beside the normal logical function, have the capability to propagate
timestamp and quality are also available. Those blocks have a designation
including the letters QT, like ANDQT, ORQT etc.
17.6.2 Setting guidelines
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There are no settings for AND gates, OR gates, inverters or XOR gates as well as,
for ANDQT gates, ORQT gates or XORQT gates.
For normal On/Off delay and pulse timers the time delays and pulse lengths are set
from the local HMI or via the PST tool.
Both timers in the same logic block (the one delayed on pick-up and the one
delayed on drop-out) always have a common setting value.
For controllable gates, settable timers and SR flip-flops with memory, the setting
parameters are accessible via the local HMI or via the PST tool.
17.6.2.1 Configuration
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Logic is configured using the ACT configuration tool in PCM600.
Execution of functions as defined by the configurable logic blocks runs according
to a fixed sequence with different cycle times.
Section 17
1MRK 506 369-UEN B
Logic
750 Line distance protection REL670 2.2 IEC
Application manual