Hitachi Hidic EH-150 Applications Manual page 49

Preliminary Rev.03
(2). Sending area
Sending area can be specified in Web page of "ASR I/O Area (Connection N) Setting". One connection can
handle up to 10 sending areas. (One sending area is called as "Entry")
In case of sending several kinds of I/O areas, they are once sent to a sending buffer according to the setting in web
browser. The following fig.7.1.1.2 shows an example of R0 to R9 (10 bits) and WM0 to WM1 (2 words).
Send area information
No. I/O
1 R
2 WM
...
...
9
10
Note
- 1 connection can handle up to 1454 bytes.
- When designated bit size is less than 8 bits (1 byte), the rest bits are all 0.
7.1.2 Automatic data receiving
This function is able to receive data from other EH-ETH or host PC to internal buffer and write to designated
receiving area. Users do not have to prepare ladder program for sending the data from the buffer to
receiving area in CPU.
(A). After the power ON, hst PC opens ASR connection between EH-ETH and host PC.
(B). After the connection opened, EH-ETH waits data from other station.
(C). EH-ETH writes received data to receiving area of the CPU.
The specification of automatic data receiving is mentioned as below.
(1). ASR connection
Up to 6 connections are available for the automatic data receiving function. One ASR connection is able to handle
both sending and receiving at the same time.
Description in this manual might be modified without notice.
Top Size
0 10
100 2
Fig. 7.1.1.2 Sending area and sending buffer
EH-CPU448 EH-ETH
Receiving area Receiving buffer
(C) (B)
Fig 7.1.2.1 Outline of automatic receiving
Chapter 7 Automatic data transmission
Sending buffer
MSB
H00 R0 R1 R2 R3
H01 R8 R9 0 0
H02 WM100 High Byte
H03 WM100 Low Byte
H04 WM101 High Byte
H05 WM101 Low Byte
(A)
7-2
LSB
R4 R5 R6 R7
0 0 0 0
Host PC
Ethernet