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Chapter 11 Communication Specifications
11-1
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
Dedicated port Dedicated port
Transmission procedure 1
Transmission
procedure 2
Port type
Transmission
procedure 1
Trans.
proce-
dure 2
Without St. No.
(1:1)
With
St. No.
(1:N)
Without
St. No.
(1:1)
With
St. No.
(1:N)
Connected devices
Programming device,
PC, modem, HMI
PC,
etc.
PC,
etc.
Programming
device, PC, HMI
PC, etc. PC, etc.
PC,
etc.
PC,
etc.
Port 1 All modules 999*- ----
Port 2 23,28 pts. module - - - 99999*
* Supported by software version 1.30 (WRF051=H0130) or newer.
11.2 Port 1
Specification of port 1 is shown below.
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,
57.6 k bps
300, 600, 1200, 2400, 4800,
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
configuration
ASCII: 7-bit data, 1 start, 1 stop, even parity
2
0
2
1
2
6
P
Start bit (1 bit) Parity bit (1 bit)
Stop bit (1 bit)
Data (7 bits) (even parity)
Configured by user
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)
Standard protocol (transmission control procedure 1),
Simplified protocol (transmission control procedure 2)
Configured by user
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.
General purpose
p
ort
General purpose
p
ort