Hitachi NJI-350B manual Port function, Communication port specification, Ascii, 11-1

Specification of port 1 is shown below.

Chapter 11 Communication Specifications

Chapter 11 Communication Specifications

11.1 Port function

Port function of MICRO-EH is shown in Table 11.1.

Table 11.1 Communication port specification

		RS-232C					RS-422/485
Port type		Dedicated port		General port		Dedicated port				General port
					Transmission procedure 1			Transmission
			Trans.					procedure 2
		Transmission
			proce-	purpose						purpose
							With	Without	With
		procedure 1			Without St. No.
			dure 2				St. No.	St. No.	St. No.
					(1:1)
							(1:N)	(1:1)	(1:N)
Connected devices		Programming device,	PC,	PC,	Programming		PC, etc.	PC, etc.	PC,	PC,
		PC, modem, HMI	etc.	etc.	device, PC, HMI				etc.	etc.
Port 1	All modules	9	9	9*	-		-	-	-	-
Port 2	23,28 pts. module	-	-	-	9		9	9	9	9*

* Supported by software version 1.30 (WRF051=H0130) or newer.

11.2 Port 1

Table 11.1 Port 1 specification

Item								Specification
Communication	Dedicated (programming) port							Modem mode	General purpose port
speed*	4800, 9600, 19.2k, 38.4k bps							2400, 4800, 9600, 19.2 k, 38.4k,	300, 600, 1200, 2400, 4800,
								57.6 k bps	9600, 19.2k, 38.4k, 57.6k bps
Communication system	Half duplex
Synchronization	Asynchronous
Startup system	One-sided startup using the host side command
Transmission system	Serial transmission (bit serial transmission)
Transmission code	ASCII								Configured by user
Transmission code	ASCII: 7-bit data, 1 start, 1 stop, even parity								Configured by user
configuration		Start bit (1 bit)					Parity bit (1 bit)
							Stop bit (1 bit)
			21	26		P
		20
		Data (7 bits) (even parity)
Data sending sequence	Sent out from the lowest bit
Error control	Vertical parity check, checksum, overrun check, framing check
Transmission unit	Message unit (variable length)
Max. message length	1,024 bytes (including control characters)
Control procedure	H-series dedicated procedure (hi-protocol)								Configured by user
	Standard protocol			(transmission control procedure 1),
	Simplified protocol				(transmission control procedure 2)
Interface	RS-232C (maximum cable length: 15 m)
Connector	8P modular connector (RJ45)

*: Handy programmers are not available with MICRO-EH.

*: GPCL01H is not available with 10 points type as communication speed is fixed as 4,800 bps.

*: If host sends NAK command, the next message must be sent after 10 ms interval.

11-1