Hitachi NJI-350B manual Remarks, Off H8000 Transmission procedure 4800 bps, 11-2

Chapter 11 Communication Specifications

(1)Port 1 settings

Port 1 is configured by combination of DIP switch and special register (WRF01A).

DIP switch can be set when cable is not connected (DR signal is off). Switch configuration is set at cable connected (DR is high).

Value in WRF01A is saved in FLASH memory when writing flag (R7F6) is turned on. If saved in FLASH memory, it is not necessary to set again at the next power up.

[ Caution ] If transmission procedure 2 is configured and saved in FLASH memory once, peripheral device/application which supports procedure 1 such as LADDER EDITOR can not be connected.

ON

1 2 3 4

Port type			DIP switch				WRF01A			Remarks
		1	2	3	4
	38.4 kbps	ON	off	ON	off
Dedicated	19.2 kbps	ON	off	off	off	H0000 : Transmission procedure 1
port	9600 bps	off	off	ON	off	H8000 : Transmission procedure 2
	4800 bps	off	off	off	off					Default
	4800 bps					H0000	: Prcd. 1 / H8000 : Prcd. 2
Dedicated	9600 bps					H0100	: Prcd. 1 / H8100 : Prcd. 2			H0*** :
	19.2 k bps		ON			H0200	: Prcd. 1	/	H8200 : Prcd. 2	Procedure 1
port via		off		off	off
	38.4 k bps					H0300	: Prcd. 1	/	H8300 : Prcd. 2	H8*** :
modem
	57.6 k bps					H0400	: Prcd. 1	/	H8400 : Prcd. 2	Procedure 2
	2400 bps					H0500	: Prcd. 1	/ H8500 : Prcd. 2
General purpose port		Port switching by FUN5 command, Baud rate by TRNS/RECV command

*Due to no DIP switch equipped, 10 points type does not support modem function.

*+12V is supplied from pin 4 if DIP switch is ON.

*General purpose port is supported by software version 0130 (WRF051=H0130) or newer.

(2)Port 1 hardware

The circuit diagram of port 1 and the signal list are shown in Figure 11.2 and Table 11.3 respectively.

Micro processor

1] SG1

5 V

2] VCC

ER1	3] DTR1
DCD1
	4] CD1
TX1
	5] SD1
RX1
	6] RD1
DR1
	7] DR1
RS1
	8] RS1
12 V

1] 2] 3] 4] 5] 6]

7]

8]

				Figure 11.2 Circuit diagram and pin numbers for port 1
					Table 11.3 List of port 1 signals
Pin No.	Signal	Direction			Meaning
	abbreviation	CPU	Host
1]	SG1				Signal ground
2]	VCC				5 V DC is supplied. (Protective fuse is connected.)
3]	DTR1 (ER)				Communication enabled signal. When it is high, communication is possible.
4]	CD1 (DCD)				12V is output when DIP switch 1 is on.
5]	SD1 (TXD)				Data sent by the CPU
6]	RD1 (RXD)				Data received by the CPU
7]	DR1 (DSR)				Peripheral units connected signal. When it is high, peripheral device is connected.
8]	RS1 (RTS)				Transmission request signal. When it is high, CPU is ready to receive data.

11-2