10: U
SER
C
OMMUNICATION
I
NSTRUCTIONS
FC5A M
ICRO
S
MART
U
SER
’
S
M
ANUAL
FC9Y-B1268
10-37
DTR Output Control Signal Option D8106 (Port 2 to Port 6) and D8206 (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.
The DTR control signal option can be used only for the user communication through the RS232C port 2 to port 7.
The control status of each port is allocated as shown below:
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
D8106/D8206
2-bit Binary Value
Description
00
While the MicroSmart is running, DTR is on whether the MicroSmart is transmitting or receiving data. While
the MicroSmart is stopped, DTR remains off. Use this option to indicate the MicroSmart operating status.
MicroSmart
DTR signal
ON
OFF
Stopped
Running
Stopped
01
Whether the MicroSmart is running or stopped, DTR remains off.
MicroSmart
DTR signal
ON
OFF
Stopped
Running
Stopped
10
While the MicroSmart can receive data, DTR is turned on. While the MicroSmart can not receive data, DTR
remains off. Use this option when flow control of receive data is required.
DTR signal
ON
OFF
Possible
Impossible
Impossible
Receive
11
Same as D8106/D8206 = 00.
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: [email protected]