6: D
EVICE
A
DDRESSES
6-26
FC5A M
ICRO
S
MART
U
SER
’
S
M
ANUAL
FC9Y-B1268
D8037 Quantity of Expansion I/O Modules
The quantity of expansion I/O modules connected to the all-in-one 24-I/O type CPU module (except 12V DC power type)
or any slim type CPU module is stored to D8037.
D8104 RS232C Control Signal Status (Port 2 to Port 6)
D8204 RS232C Control Signal Status (Port 7)
RS232C control signal status of port 2 through port 7 is stored to D8104 and D8204.
Bit 15
0
2
0
1
0
0
D8104
0
3
Port 2
Port 3
0
6
0
5
0
4
0
7
Port 4
Port 5
0
8
0
9
Port 6
Bit 15
0
1
0
0
D8204
Port 7
00:
Both DSR and DTR are off
01:
DSR is off, DTR is on
10:
DSR is on, DTR is off
11:
Both DSR and DTR are on
D8105 RS232C DSR Input Control Signal Option (Port 2 to Port 6)
D8205 RS232C DSR Input Control Signal Option (Port 7)
Special data registers D8105 and D8205 are used to control data flow between the MicroSmart RS232C port 2 through
port 7 and the remote terminal depending on the DSR (data set ready) signal sent from the remote terminal.
Bit 15
0
2
0
1
0
0
D8105
0
3
Port 2
0
6
0
5
0
4
0
7
0
8
Port 3
Port 4
0
9
0
12
0
11
0
10
0
13
0
14
Port 5
Port 6
Bit 15
0
2
0
1
0
0
D8205
Port 7
000:
DSR is not used for data flow control
001:
When DSR is on, MicroSmart can transmit and receive data
010:
When DSR is off, MicroSmart can transmit and receive data
011:
When DSR is on, MicroSmart can transmit data (busy control)
010:
When DSR is off, MicroSmart can transmit data
Others: Same as 000
D8106 RS232C DTR Output Control Signal Option (Port 2 to Port 6)
D8206 RS232C DTR Output Control Signal Option (Port 7)
Special data registers D8106 and D8206 are used to control the DTR (data terminal ready) signal to indicate the
MicroSmart operating status or transmitting/receiving status.
Bit 15
0
2
0
1
0
0
D8106
0
3
Port 2
Port 3
0
6
0
5
0
4
0
7
Port 4
Port 5
0
8
0
9
Port 6
Bit 15
0
1
0
0
D8206
Port 7
00:
DTR is on (off while MicroSmart is stopped)
01:
DTR is off
10:
DSR is on while MicroSmart can receive data (auto switching)
11:
Same as 00
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