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Stored information
6
The parameter values measured at the moment
when a fault occurs are recorded in the registers,
in some modules also the setting values. The
recorded data, except for some setting param-
eters, are set to zero by pressing the push-
buttons STEP and RESET simul-taneously.
The data in normal registers are erased if the
auxiliary voltage supply to the relay is disrupted,
only the set values and the number of
autoreclosings are maintained in the registers at
a voltage failure.
The number of the registers varies with different
module types. The function of the registers are
illustrated in the descriptions of the separate
relay modules. Additionally, the system panel
contains a simplified list of the data recorded by
the various relay modules of the relay assembly.
All C-type relay modules are provided with two
general registers: register 0 and register A.
Register 0 contains, in coded form, the informa-
tion about e.g. external blocking signals and
status information for the circuit breaker. The
codes are explained in the descriptions of the
relay modules.
Register A contains the address code of the relay
module as required by the serial communication
system. Example 1 on page 4 shows how the
address code is altered. Submenu 1 of register A
contains the data transfer rate value expressed in
kilobaud for the serial communication.
Submenu 2 of register A contains a bus traffic
monitor for the SPACOM system. If the protec-
tive relay, which contains the relay module, is
linked to a system including the control data
communicator and the data communication
system is operating, the counter reading of the
monitor will be zero. Otherwise the digits 1...255
are continuously rolling in the monitor.
Submenu 3 contains the password required for
changing the remote settings. The address code,
the data transfer rate for the serial communica-
tion and the password can be set manually or via
the serial communication bus. For manual set-
ting see example 1.
The start value for the address code and the
password is 001 and that for the data transfer
rate 9.6 kilobaud.
ABB Automation
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