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I
4.A2CCPU
- - - - - - - - - - - - - - - - - - - - MELSEC-A
No.
Name
Function
(9)
Memory selection switch
• The switch used to set the type of memory (RAM installed in the A2C or EP-AOM)
used to store programs.
• RAM in the A2C : Set the switch in the OFF poeltlcn.
• EP-ROM : Set the switch in the ON position.
Memo,y Selection SwItch Setting
Inte,nal RAM
Ep·ROM
0
2
v~emory
0
2
/MemOry
selection switch
selection swItch
n
n
O N _
No-----
SW
sw
(10)
Battery connector
• The connector used to connect a battery lead connector.
For connector connection, see Section 5.1.
(11)
RS-422
connector
• Connector where a peripheral device is connected.
• Connect a peripheral device to write/read, monitor, or test a program with a
peripheral device.
(12)
Memory connection
• The socket used to install an EP-ROM.
socket
For memory installation, see Section 5.1.
(13)
Battery
• The battery used to retain the program and the device and file register data in
the latch range.
For the procedure to connect a battery, see Section 5.2.
(14)
Station number setting
• Station number setting switches
switches
STATION No.
• Set station number 00 to 64.
~
• Set the number of tens of station number to "X10".
• Set the number of units of station number to "X1".
,
, '
Xl
• When the station is used as a master station, set "00".
~
• When the station is used as a local station, set "01 to 64",
1
o
9
(15)
Mode select switch
• By
switching mode, the following functions are available.
Betting Number
Name
DescriptIon
0
Online
Automatic return set during normal operation.
1
Online
AutomatIc return not set durIng normal operation.
MODE
Offline
DIsconnected host station.
2
6
7 8 9
A
3
Test mode 1
Forward loop test
~®g
4
Test mode 2
Reverse loop test
5
Test mode 3
Btetlcn-tc-stetlcn test (main station)
2 1 0 FE
Test mode 4
stettce-tc-etettcn test (subordinate etatlon)
7
Test mode 5
Self-loopback test
Not used
Not used
Ato C
Not usable
o to F
Not used
4-89

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