Novar NOVAR-1xxx NRC Operating Manual - page 8
Novar-NRC
KMB systems
8
2.1.2 Remote Controlled Outputs – the „I/O“ Mode
The Novar1xxx NRC PFC is connected to the NRC86 remote controller (optionally to more of such
controllers) through a RS-485 communication link. Capacitor (or choke) contactors are not connected
to the PFC outputs but to corresponding outputs of the NRC86 controller(s).
Using additional parameters of the „0E“ special firmware the PFC can be set up to the I/O-mode
(Input/Output). Then the PFC output state is periodically transmitted to the NRC86 controller(s) and its
outputs state „copies“ the PFC outputs state. The outputs refresh speed is between 3 ÷ 10 times per
second if a transparent communication medium ( i.e. a medium with no transmission delay) is used (it
depends on preset communication rate and remote control mode). If usual metallic cable is used
maximum distance between the PFC and the NRC86 unit is up to 1 km, but it can be nearly unlimited
for suitable wireless media.
Up to seven NRC86 units can be connected. At each of the units you can set how many outputs to
process (i.e. how many of its outputs are controlled by the PFC outputs); then other outputs of the
PFC are processed by other NRC86 units. By this you can control outputs which are spatially spread
within reach of the communication line.
Desired remote controlled mode ( either the „RCC“ or the „I/O“ ) can be set using additional
parameters according Tab. 2.1°. Essential matters that differ from standard version are bolded.
Significant parameters detailed description follows.
2.2 Parameters 01(07) – Target PF for Metering Rate 1(2) / Actual Remote
Controlled Target PF
2.2.1 Parameter 01
If the remote control mode (par. 53) is switched off or if the metering rate 2 control (par. 06) is
enabled, parameter 01 has usual meaning, i.e. preset target PF value ( for metering rate 1).
If any of RCC-modes is set and the metering rate 2 control is disabled simultaneously, the target
PF is remote controlled by external NRC86 unit. In such case an actual value of remote controlled PF
with preceding „E“ character is displayed in parameter 01 ( for example
E0
E0
E0
E0.97
97
97
97
). This value cannot
be edited in parameter 01; it is defined by preset value of remote controlled target PF in parameter 80,
corresponding to actual state of remote controlled PF serial number. This serial number ( in range 1 ÷
5 ) is periodically read from theNRC86 unit and its value can be checked in parameter 81.
Thus the PFC controls PF to one of preset values in parameter 80. Usual value of parameter 01, i.e.
standard target PF value for metering rate 1, has no meaning in the RCC-mode and it is not displayed.
But, if the metering rate 2 control (par. 06) is enabled, the parameter 01 has usual meaning - preset
target PF value ( for metering rate 1). Then, if the metering rate 2 is inactive actually, the parameter 01
target PF is used for PF control and the remote controlled target PF value is ignored.
2.2.2 Parameter 07
The standard meaning of this parameter is target PF for metering rate 2 (the second tariff). If the
metering rate control (parameter 06) is disabled its value has no meaning.
If the metering rate 2 control is enabled and the RCC-mode is off, target PF is defined by the
parameter 01 or 07 according actual state of the metering rate 2 control value.