Download  Print this page

Advertisement

4. A2CCPU
MELSEC-A
I
No.
Name
Function
(2)
Indicator LEOs
LEOs indication operation status and error occurrence status of A2CCPUP21/A21
LED
Description
LED
Description
L.AUN
Lit
when data link Is normal
·1 POWER
Lit
when power is turned ON.
L.SD
LIt while data are being sent.
"2
RUN
Lit when the RUN key switch is set in
RUN.
L.RD
Lit while data are being received.
"3 Em::>! LIt at an occurrence of PC CPU error.
Not used (Always OFF)
"4
SO
Lit during sending In MININET.
eRe
Lit at an occurrence of code check error.
"5
RO
Lit during receiving In MININET.
OVER
Lit
at an occurrence of data entry delay
error.
AS.IF
Lit
when all data are "1,"
TIME
Lit
at an occurrence of tfme-out error.
DATA
Lit at an occurrence of receive data
F.lOOP
Lit
when data receive line is forward
error.
loop.
L.RUN
'00'
POWER
UNDER
lit
at an occurrence of send data error.
CPU RIW
Lit during communications with PC CPU.
F.LOOP
Lit
at an occurrence of forward loop
L.SD
00
RUN
receive data error.
I
L.RD
00
ERROR
R.lOOP
Lit
at an occurrence of reverse tccp
00 solMINiI
receive data error.
cec
00
RO
1
10
OVER
00
2
Indicates the lowest dIgit number of the
20
Indicates the second lowest digit
AB.IF
00
number of the station number in BCD.
4
station number In BCD.
40
TIME
00
DATA
00
F.
LOOP
S
UNDER
00
CPU R/W
F.LOOP
00
(1)
• The LEDs (L.RUN to 8) in the left side indieetethe MELSECNET data link
R.LOOP
00
1
00
10
operation status.
For details, refer to the MELSECNET (II) Data Link
2 00 20
Reference Manual.
4
00
40
8
00
(2)
*1
POWER LED for 5 VDe power indication
ON:
100 V
1200 VAC
power is
supplied to the A2C, and it is converted normally
to 5 VDC inside the A2C.
OFF:
100 V
1200 VAC power is not supplied to the A2C.
100 V
1200 VAC power is not converted to 5 VDC.
(3)
*2
RUN LED indicating A2C operating status
Lit (ON) :
A sequence program operation is being executed with the RUN key switch
set in the RUN position.
The LED remains lit if an error, which permits sequence program operation
to continue, occurs. See Section 4.10.
Unlit (OFF) :
The RUN LED goes out in the following cases.
• 100/200 VAC is not supplied to the A2C.
• The RUN key switch is in the STOP position.
• The remote STOP signal is input. See Section 4.2.3.
• The remote PAUSE signal is input. See Section 4.2.4.
Flicker :
The RUN LED flickers in the following cases.
• An error which causes sequence program operation to stop is
detected by the self-diagnosis function.
• The latch clear operation is executed. See Section 4.2.2.
4-85

Advertisement

Table of Contents

   Also See for Mitsubishi Electric MELSEC-A Series

   Related Manuals for Mitsubishi Electric MELSEC-A Series

Comments to this Manuals

Symbols: 0
Latest comments: