4. Jumper Settings
26
PC-686BX(NLX)-LV, PC-686BX(NLX)-LVV
RS-232C/422/485 Selector Switch: JP1/JP2
Table 4.2. JP1/JP2: RS-232C/422/485 Selector Switch
RS-232C
(Default)
RS-422
RS-485
1. For RS-485, the TX+ (pin 2) and RX+ (pin 3) lines must be
jumpered together in the D-type connector.
2. The same applies to the TX- (pin 1) and RX- (pin 4) lines.
JP2
JP1
2 4 6 8 10
2 4 6 8 10 12 14 16 18 20 22 24
1 3 5 7 9
1 3 5 7 9 11 13 15 17 19 21 23
JP2
JP1
2 4 6 8 10
2 4 6 8 10 12 14 16 18 20 22 24
1 3 5 7 9
1 3 5 7 9 11 13 15 17 19 21 23
JP2
JP1
2 4 6 8 10
2 4 6 8 10 12 14 16 18 20 22 24
1 3 5 7 9
1 3 5 7 9 11 13 15 17 19 21 23
Transmit Data Control for Half-Duplex Mode
The transmit buffer must be controlled to prevent transmit data collisions in half-
duplex mode. The port controls data transmission using the RTS signal and bit 1 of
the modem control register.
Modem Control Register
(I/O a 4H) Bit 1:
0 ... RTS high (Transmit disabled)
1 ... RTS low (Transmit enabled)
Содержание PC-686BX(NLX)-LV
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Страница 19: ...2 Specifications 12 PC 686BX NLX LV PC 686BX NLX LVV ...
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