3-21
Displaying control I/O signal terminals
The status of control I/O signal terminals may be displayed with ON/OFF of the LED segment or in
hexadecimal display.
•
Display I/O signal status with ON/OFF of each LED segment
As shown in Table 3.17 and the figure below, each of segments "a" to "g" on LED1 lights when the
corresponding digital input terminal circuit ([FWD], [REV], [X1], [X2], [X3], [X4] or [X5]) is closed; it
goes off when it is open. Segment "a" and "b" on LED3 light when the circuit between output terminal
[Y1] or [Y2] and terminal [CMY], and do not light when the circuit is open. Segment "a" on LED4 is for
terminals [30A/B/C]. Segment "a" on LED4 lights when the circuit between terminals [30C] and [30A]
is short-circuited (ON) and does not light when it is open.
If all terminal input signals are OFF (open), segment "g" on all of LED1 to LED4 will light
("– – – –").
Table 3.17 Segment Display for External Signal Information
Segment LED4 LED3 LED2 LED1
a 30A/B/C Y1-CMY — FWD
b — Y2-CMY — REV
c — — — X1
d — — — X2
e — — — X3
f — — (XF)* X4
g — — (XR)* X5
dp — — (RST)* —
—: No corresponding control circuit terminal exists
* (XF), (XR), and (RST) are assigned for communication. Refer to " Displaying control I/O signal terminals
under communications control
" on the next page.
•
Displaying I/O signal status in hexadecimal format
Each I/O terminal is assigned to bit 15 through bit 0 as shown in Table 3.18. An unassigned bit is
interpreted as "0." Allocated bit data is displayed on the LED monitor as four hexadecimal digits (
to
H
each).
With the FRENIC-Multi, digital input terminals [FWD] and [REV] are assigned to bit 0 and bit 1,
respectively. Terminals [X1] through [X5] are assigned to bits 2 through 6. The bit is set to "1" when
the corresponding input terminal is short-circuited (ON), and is set to "0" when it is open (OFF). For
example, when [FWD] and [X1] are ON (short-circuited) and all the others are OFF (open),
is
displayed on LED4 to LED1.
Digital output terminal [Y1] and [Y2] are assigned to bits 0 and 1. Each bit is set to "1" when the
terminal is short-circuited with [CMY], and "0" when it is open.
The status of the relay contact output terminal [30A/B/C] is assigned to bit 8. It is set to "1" when the
circuit between output terminals [30A] and [30C] is closed, and "0" when the circuit between [30A]
and [30C] is open.
For example, if [Y1] is ON, [Y2] is OFF, and the circuit between [30A] and [30C] is closed, then
"
" is displayed on the LED4 to LED1.
Table 3.18 presents an example of bit assignment and corresponding hexadecimal display on the
7-segment LED.
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