Fuji Electric Frenic lift, Справочное руководство

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1.1 Symbols Used inside the Block Diagrams and their meanings
C
hap.
1
BL
O
C
K
D
IAG
R
AM
S
FO
R
C
ON
TR
OL
L
OGI
C
FRENIC-Lift (LM2A) series of inverters for lifting machines such as elevators are equipped with a number
of function codes to match a variety of motor operations required in your system. Refer to Chapter 2
"FUNCTION CODES" for details of the function codes.
The function codes have functional relationship to each other. Several special function codes also work with
execution priority each other depending on their functions or data settings.
This chapter explains the main block diagrams for control logic in the inverter. You are requested to fully
understand the inverter's control logic together with the function codes in order to specify the function code
data correctly.
The block diagrams contained in this chapter show only function codes having mutual relationship. For the
function codes that work independently and for detailed explanation of each function code, refer to Chapter 2
"FUNCTION CODES."
1.1 Symbols Used inside the Block Diagrams and their
meanings
Table 1.1 lists symbols commonly used inside the block diagrams and their meanings with some examples.
Table 1.1 Symbols and Meanings
Symbol Meaning Symbol Meaning
[FWD], [Y1]
etc.
Input/output signals to/from
the inverter's control
terminal block.
Function code.
(FWD), (REV)
etc.
Control commands assigned
to the control terminal block
input signals.
Switch controlled by a
function code. Numbers
assigned to the terminals
express the function code
data.
Low-pass filter: Features
appropriate characteristics
by changing the time
constant through the
function code data.
Internal control command
for inverter logic.
Switch controlled by an
external control command.
In the example shown on the
left, the enable
communications link
command (LE) assigned to
one of the digital input
terminals from [X1] to [X5]
controls the switch.
High limiter: Limits the
upper value by a constant or
data set to a function code.
Low limiter: Limits the
lower value by a constant or
data set to a function code.
OR logic: In normal logic, if
any input is ON, then C =
ON. Only if all inputs are
OFF, then C = OFF.
Zero limiter: Prevents data
from dropping to a negative
value.
NOR (Not-OR) logic: In
normal logic, if any input is
OFF, then C = ON. If all
inputs are ON, C = OFF.
Gain multiplier for reference
frequencies given by current
and/or voltage input or for
analog output signals.
C = A × B
AND logic: In normal logic,
only if A = ON and B = ON,
then C = ON. Otherwise, C =
OFF.
Adder for 2 signals or
values. C = A + B
If B is negative then C = A –
B (acting as a subtracter).
Detection point. Shows a
detection point for a value
indicated in the frame at the
checkpoint .
1-1