Hitachi EH-150 Series - Page 136

Chapter 6 Communication mode
6 - 94
Simple data link
[4] Waiting time between stations
EH-SIO sends a command to each station one by one. Interval time between stations can be configurable.
EH-SIO will wait specified time multiplied by 10ms and sends response to next slave station.
The possible value for configuration is from 0 to 255 (H00FF). Data in high is ignored.
Figure 6.69 Waiting time between stations
[5] Setting data link area
I/O type and address is configured by 2 words. This address will be the starting address of data link area. (same
both for Master and Slave station.)
Ex.) Incase of WRA00 should be start address  1st word : H000A
2nd word : H0A00
[6] Number of words for master
Specify the data size of master in BCD. Valid range is H02 to H48. If the value is less than H1 or more than H49
or including A to F characters, initial setting error will be detected.
Not used
1 word
Response
Request
EH-SIO
Slave A
Response
Slave B
Response
Slave C
Waiting time for
switching station
number
1st word
2nd word
I/O code : WR  H000A
WL  H000B
WM  H000C
I/O No. : H0000 to HFFFF
(Not used)
1 word