3-13
Chap. 3 OPERATION USING THE KEYPAD
■ 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.
•
Displaying the I/O signal status with ON/OFF of each LED segment
As shown in Table 3.12 and the figure below, each of segments "a" to "dp" on LED1 and LED2 lights when the corresponding
digital input terminal circuit ([FWD], [REV], [X1] to [X7]) is closed; it goes OFF when it is open. Each of segments "a" to "e"
on LED3 lights when the circuit between output terminal [Y1], [Y2], [Y3] or [Y4] and terminal [CMY] or between terminals
[Y5A] and [Y5C] is closed, respectively; it goes OFF when the circuit is open. Segment "a" on LED4 is for terminals
[30A/B/C] and lights when the circuit between terminals [30C] and [30A] is short-circuited (ON) and goes OFF when it is
open.
If all terminal signals are OFF (open), segments "g" on all of LED1 to LED4 will light ("– – – –").
Table 3.12 Segment Display for External Signal Information
Segment LED4 LED3 LED2 LED1
a 30A/B/C Y1-CMY X7 FWD
b ― Y2-CMY ― REV
c ― Y3-CMY ― X1
d ― Y4-CMY EN X2
e ― Y5A-Y5C ― X3
f ― ― (XF) * X4
g ― ― (XR) * X5
dp ― ― (RST) * X6
—: 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
Each I/O terminal is assigned to bit 15 through bit 0 as shown in Table 3.13. An unassigned bit is interpreted as "0." Allocated
bit data is displayed on the LED monitor as four hexadecimal digits (
0
to
f
each).
On the FRENIC-MEGA, digital input terminals [FWD] and [REV] are assigned to bits 0 and 1, respectively. Terminals [X1]
through [X7] are assigned to bits 2 through 10. 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),
0005
is displayed on LED4 to LED1.
Digital output terminals [Y1] through [Y4] are assigned to bits 0 through 3. Each bit is set to "1" when the output terminal [Y1],
[Y2], [Y3] or [Y4] is short-circuited with [CMY] (ON), and "0" when it is open (OFF).
The status of the relay contact output terminal [Y5A/C] is assigned to bit 4. It is set to "1" when the circuit between output
terminals [Y5A] and [Y5C] is closed. The status of the relay contact output terminals [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] through [Y4] are OFF, the circuit between [Y5A] and [Y5C] is open, and the circuit between
[30A] and [30C] is closed, then "
0101
" is displayed on the LED4 through LED1.
Table 3.13 presents bit assignment and an example of corresponding hexadecimal display on the 7-segment LED.
Table 3.13 Segment Display for I/O Signal Status in Hexadecimal (Example)
LED No. LED4 LED3 LED2 LED1
Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Input terminal (RST)* (XR)* (XF)* - EN - - X7 X6 X5 X4 X3 X2 X1 REV FWD
Output terminal - - - - - - -
30A/
B/C
- - -
Y5A/C
Y4 Y3 Y2 Y1
Binary
0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 1
Example
Hexa-
decimal on
the LED
monitor
– 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.
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