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Communicating with the PC Using C200H Direct Communication
Section 2-7
2-7-3
Switching the Power ON/OFF When Using C200H Direct
Communication
The NT20S-ST122-V1 functions as an I/O extension unit of the PC. Use the fol-
lowing procedure to switch the power ON and OFF.
Caution:
Depending on the method used to switch the power ON and OFF, the entire sys-
tem may stop. Follow the procedure described below to switch the power ON and
OFF.
Power ON
Switch the power ON as follows:
[NT20S power ON]
“Connecting to Host” is displayed on the NT20S screen.
. . . .
↓
[PC power ON]
After “Connecting to Host” has been displayed for
. . . . . . .
approximately 1 second, normal operation starts.
Note:
S
If the power to the PC is switched on first, the CPU of the PC is subjected to a
system reset, making operations such as programming console impossible.
Then, when the power to the NT20S is switched on, “Connecting to Host” is dis-
played on the NT20S screen for approximately 1 second, after which normal op-
eration starts.
S
If the I/O connection cable is disconnected during system operation, an I/O bus
error occurs at the PC side and operation stops. If this happens, connect the I/O
connection cable and cancel the error.
Power OFF
Switch the power OFF as follows:
[Switch the power supplies to the PC and NT20S off simultaneously]
The next time the power is switched ON, the NT20S dis-
. . . . . . . . . . . . . . . . . . . . .
plays the screen that was displayed when the power
was switched OFF.
Note:
S
If the power to the NT20S is switched off first, the CPU of the PC is subjected to a
system reset, making operations such as programming console impossible.
S
Switch off the system temporarily before replacing the NT20S (when a fault oc-
curs, for example). If the power to the NT20S only is switched off, the system
stops immediately and this could cause an accident or damage machinery.
Summary of Contents for NT20S
Page 1: ...Cat No V020 E1 04 NT20S Programmable Terminal OPERATION MANUAL ...
Page 2: ...i ...
Page 3: ...ii ...
Page 4: ...iii NT series Programmable Terminal Operation Manual Revised August 1997 ...
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Page 11: ...x ...
Page 19: ...xviii ...
Page 129: ...110 ...
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Page 253: ...234 ...