3.4 Programming Mode
3-29
OPERATION USING THE KEYPAD
■ Displaying control I/O signal terminals
The status of control I/O signal terminals can be displayed in two ways: with ON/OFF of each LED segment and in
hexadecimal.
⚫ Displaying the I/O signal status with ON/OFF of each LED segment
As shown in Table 3.4-9 below and the figure below, each of segments “a” to “dp” on LED1 and LED2 light up when
the corresponding digital input terminal circuit ([FWD], [REV], [X1] to [X9], [EN1] and [EN2]) is closed (ON); it goes
OFF when it is open (OFF). Segments “a” to “e” on LED3 light up when the circuit between output terminal [Y1] to
[Y4] and terminal [CMY], and between [Y5A] and [Y5C] is closed, respectively; it goes OFF when the circuit is open.
Segment “a” on LED4 is for terminals [30A/B/C]. This segment lights up when [30C] is short-circuited with [30A],
and goes OFF when the circuit is open.
If all terminal signals are OFF (open), segment “g” on all segments (LED1 to LED5) will light up
(“-----”).
Table 3.4-9 Display of I/O signal status with ON/OFF of each LED segment
–: No corresponding control circuit terminal exists.
* (XF), (XR), and (RST) are assigned for communications control. Refer to “Displaying control I/O signal terminals
under communications control” on the next page.
⚫ Displaying I/O signal status in hexadecimal notation
Each I/O terminal is assigned to 16-digit binary bit 0 to bit 15. Unassigned bits are interpreted as “0.” Allocated bit
data is displayed on the LED monitor as four hexadecimal digits (0 to f).
On the FRENIC-MEGA, digital input terminals [FWD] and [REV] are assigned to bits 0 and 1, respectively, and
terminals [X1] to [X9] are assigned to bits 2 to 6. The bit is set to “1” when the corresponding input terminal is short-
circuited (ON), and it is set to “0” when the terminal is open (OFF). For example, when [FWD] and [X1] are ON
(short-circuited) and all the others are OFF (open), 00005 is displayed on LED5 to LED1.
Digital output terminals [Y1] to [Y4] are assigned to bits 0 to 3. Each bit is set to “1” when the circuit between [Y1]
to [Y4] and [CMY] is short-circuited (ON), and “0” when it is open (OFF). The status of contact output terminals
[30A/B/C] and [Y5A/C] is assigned to bits 8 and 9. It is set to “1” when the circuit between [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, “00101” is displayed on LED5 to LED1.
The terminals assigned to bits 0 to 15 and Display of I/O signal status in hexadecimal notation (example) are
shown in Table 3.4-10.
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