Port Function - Hitachi HIDIC MICRO-EH Applications Manual

Chapter 11 Communication Specifications

11.1 Port function

Port function of MICRO-EH is shown in Table 11.1.
Port type
Connected devices
Port 1 All modules
Port 2 23,28 pts. module
* Supported by software version 1.30 (WRF051=H0130) or newer.
11.2 Port 1
Specification of port 1 is shown below.
Item
Communication
speed*
Communication system Half duplex
Synchronization
Startup system
Transmission system
Transmission code
Transmission code
configuration
Data sending sequence Sent out from the lowest bit
Error control
Transmission unit
Max. message length
Control procedure
Interface
Connector
* : 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.
Table 11.1 Communication port specification
RS-232C
Dedicated port
Transmission
procedure 1
Programming device,
PC, modem, HMI
-
Table 11.1 Port 1 specification
Dedicated (programming) port
4800, 9600, 19.2k, 38.4k bps
Asynchronous
One-sided startup using the host side command
Serial transmission (bit serial transmission)
ASCII
ASCII: 7-bit data, 1 start, 1 stop, even parity
Start bit (1 bit) Parity bit (1 bit)
Stop bit (1 bit)
0 1 6
2 2 2 P
Data (7 bits) (even parity)
Vertical parity check, checksum, overrun check, framing check
Message unit (variable length)
1,024 bytes (including control characters)
H-series dedicated procedure (hi-protocol)
Standard protocol (transmission control procedure 1),
Simplified protocol (transmission control procedure 2)
RS-232C (maximum cable length: 15 m)
8P modular connector (RJ45)
11-1
Chapter 11 Communication Specifications
Transmission procedure 1
Trans.
proce-
Without St. No.
dure 2
(1:1)
PC, PC,
Programming
etc. etc.
device, PC, HMI
* -
- -
Specification
Modem mode
2400, 4800, 9600, 19.2 k, 38.4k,
57.6 k bps
RS-422/485
Dedicated port
Transmission
procedure 2
With Without With
St. No. St. No. St. No.
(1:N) (1:1) (1:N)
PC,
PC, etc. PC, etc.
etc.
- - -
General purpose port
300, 600, 1200, 2400, 4800,
9600, 19.2k, 38.4k, 57.6k bps
Configured by user
Configured by user
Configured by user
PC,
etc.
-
*