Hitachi EH-150 Series - Master Configuration (Initial Setting of EH-SIO)

Chapter 6 Communication mode
6 - 92
Simple data link
6.6.4 Master configuration (Initial setting of EH-SIO)
EH-SIO must be configured as simple data link mode by initial setting. (This is same as other configuration, TRNS
9 command is required for EH-SIO initial setting.) EH-SIO starts simple data link operation after initial setting.
Once initial setting is completed, EH-SIO continues simple data link operation even if CPU module is in stop mode.
To change the communication mode of EH-SIO, reboot the power or reset EH-SIO.
« Note »
EH-SIO will not receive any command from CPU module except initial setting command unless initial setting
completed.
 Needed parameters for initial setting
Table 6.26 The table of parameter for initial device,
No.
Parameters
Contents
1
Communication mode
EH-SIO operation depends on selected communication mode.
Configure parameters for simple data link mode.
2
Waiting time of slave
response
Specify waiting time for slave response.
3
Waiting time between stations
Specify waiting time between stations.
4
Setting of data link area
Specify internal output I/O type and start address of data link operation.
5
Number of words occupied
by master
Specify data size (word) for master station.
6
Number of stations and words
number of each stations
Specify station number of slaves and data size (word).
 s Parameters of TRNS 9 for initial setting
Initializing command (specified as s+7) is H0000.
Be sure to set parameters in the sending data area (s+9 to s+A) according to the next page, and be sure to set
dummy parameter in the receiving data area (s+B to s+D) although nothing is stored in the configured address area.
Figure 6.66 s Parameters of simple data link mode initial setting
« Note »
Although "receiving data area" is not used in simple data link mode, configure a dummy address in it.
(data in this address has nothing to do with TRNS 9 command.)
Size of receiving data area
Top I/O address of
receiving data area
Return code
H0000 (Command)
Command timeout time
Top I/O address of
sending data area
s
s+7
s+8
s+9
s+B
s+D
System area ( 6 word )
User definition area