Fuji Electric FRENIC-Ace series, User Manual

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8.1 Meanings of Symbols Used in the Control Block Diagrams
8-1
BLO
C
K
D
IA
G
R
AM
S
FO
R
C
O
N
TR
O
L
LO
G
IC
Chap
8
The high-performance and compact inverter FRENIC-Ace is provided with various functions that allow operations
to meet the application requirements. Refer to Chapter 5 “FUNCTION CODES” for details of each function code.
Function codes are mutually related and priority order is given depending on the function codes and data thereof.
This chapter shows major internal control block diagrams. Understand the diagrams together with the explanation
of each function code to correctly set up each function code.
Note that the internal control block diagrams show only the function codes mutually related. Refer to Chapter 5
“FUNCTION CODES” for function codes operated individually and each function code explanation.
8.1 Meanings of Symbols Used in the Control Block Diagrams
This section explains major codes, with examples, used in the block diagrams from the next item.
Table 8.1-1 Codes and Meanings
Symbol Meaning Symbol Meaning
[FWD], [Y1], etc.
These symbols denote
general-purpose input/output
terminals of the inverter
control circuit terminal blocks.
This denotes a function code.
“FWD”, “REV”, etc.
These symbols denote control
signals (input) or state signals
(output) allocated to the
control circuit terminals.
This indicates a switch
controlled by a function code.
Figures of switch terminals
indicate function code data.
This is low-pass filter. Time
constant is changeable based
on function code data.
This symbol denotes control
command used inside the
inverter.
This indicates a switch
controlled by an internal
function control command. An
example at left indicates a link
operation selection command
“LE” allocated to a digital input
terminal.
This indicates upper limit
limiter. This limits an upper
limit value by function code
setting or a constant.
This indicates lower limit
limiter. This limits a lower limit
value by function code setting
or a constant.
This denotes a logical sum
(OR) circuit.
In the case of the positive
logic, when any one of inputs
is ON, C=ON, and when all
inputs are OFF, C=OFF.
This is 0 (zero) limiter. This
prevents data from becoming
minus.
This denotes an NOR
(NOR-OR) circuit.
In the case of the positive
logic, when any one of inputs
is OFF, C=ON, and when all
inputs are ON, C=OFF.
This denotes a set frequency
given by a current or a
voltage. This is a gain analog
multiplier for an analog output
signal etc., calculated by
C=A×B.
This denotes a conjunction
(AND) circuit.
In the case of the positive
logic, only when A=ON and
B=ON, C=ON, and C=OFF
under other conditions.
This denotes an adder of two
signals or amounts,
calculated by C=A+B.
This becomes a subtracter
when B is a minus sign,
calculated by C=A-B.
This denotes a logical
negation (NOT) circuit.
In the case of the positive
logic, when A=ON, B=OFF,
and when A=OFF, B=ON.
SET FREQUENCY
LINK OPERATION
SELECTION