INSTALLATION
SINUS K
INSTRUCTIONS
102/
191
12.1.2.2.
L
INE
T
ERMINATORS
Provide a linear wiring (not a star wiring) for multidrop line RS485. To do so, two pins for each line signal are
provided on the inverter connector. The incoming line may be connected to pins 1 and 2, whereas the outgoing
line may be connected to pins 3 and 4.
The first device in the multidtrop connection will have only one outgoing line, while the last device will have only
one incoming line. Line terminator is to be installed on the first device and the last device. In serial link 0, the
terminator is selected through dip-switch SW1 for SINUS K inverters (see the Jumpers and Dip-Switches section).
The line master (computer) is typically placed at the beginning or at the end of a multidrop connection; in that
case, the line terminator of the farthest inverter from the master computer (or the only inverter in case of direct
connection to the master computer) shall be enabled: dip-switch SW1 in position ON.
The line terminator of the other inverters in intermediate positions shall be disabled: dip-switch SW1, in position
OFF.
NOTE
Communication does not take place or is adversely affected if multidrop
terminators are not properly set, especially in case of a high baud rate. If
more than two terminators are fitted, some drivers can enter the protection
mode due to thermal overload, thus stopping dialoguing with some of the
connected devices.
12.1.3.
ES822
I
SOLATED
B
OARD
(O
PTIONAL
)
ES822 Optional board can be used to connect the equipment to RS485 or RS232 serial link. ES822 isolated
board is to be installed inside the inverter to connect it either to a computer via serial link RS232 (with no need
to use additional devices) or to RS485 serial link. ES822 Optional board also ensures galvanic isolation between
the serial link and the inverter control board grounding, thus avoiding unwanted loops and improving immunity
to serial link disturbance. For more details, see ES822/1 ISOLATED SERIAL BOARD in the ACCESSORIES section
of this manual.
The activation of ES822 results in the automatic commutation of serial link 0, which is electrically suppressed
from the standard serial connector of the inverter.
12.2.
The Software
The serial communication protocol is MODBUS RTU standard.
Parameters are queried as they are read using the keys and the display. Parameter alteration is also managed
along with the keypad and the display. Note that the inverter will always consider the latest value set either via
serial link or by the inverter.
The terminal board inputs may be controlled by the field or the serial link, depending on programming of
parameters C21 and C22 for IFD SW, C14 and C16 for VTC SW.
If parameters C21 or C14 are set to REM, commands relating to START digital inputs and to multifunction inputs
are to be sent via serial link. Their condition in the terminal board has no effect.
If parameters C22 or C16 are set to REM, the main reference is to be sent via serial link. Signals applied to
terminals 2, 3 and 21 (Vref1, Vref2 and Iref) have no effect.
However, the ENABLE command is always to be sent via terminal board regardless of the inverter programming
mode.
Содержание SINUS K
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