Hitachi EH-150 Series - Page 121

Chapter 6 Communication mode
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Hi-Protocol
 Sending data area for Initial setting
Parameter structure of sending data area (s+9, s+A) is as follows.
Figure 6.60 Sending data area for Hi-Protocol mode initial setting
Each meanings and values of parameters are shown in below.
[1] Number of send data (bytes)
The number of data transmitted to EH-SIO is specified.
In case that use expansion communication setting … 8 / H0008.
In case that do not use expansion communication setting … 6 / H0006.
[2] Specification of Communication mode
Specify the communication mode of EH-SIO. H0020 is required to specify Hi-Protocol mode.
[3] Specification of Transmission procedure, Usage of station number
(1) Transmission control procedure
Specify the communication control procedure.
Table 6.21 Specification of transmission control procedure
Value
Procedure
Normal communication setting
Expansion communication setting
H00
Standard
(Transmission control procedure 1)
Standard
(Transmission control procedure 1)
H01 -
HFD
Simple
(Transmission control procedure 2)
Simple
(Transmission control procedure 2)
HFE
Standard
(Transmission control procedure 1)
using expansion communication setting
HFF
Simple
(Transmission control procedure 2)
using expansion communication setting
(2) Usage of station number
Specify the type of task code communication with station number or without station number.
Table 6.22 Usage of station number
Value
Type of task code communication
H00
Without station number (for 1 : 1 communication usage)
H01 - HFF
With station number (for 1 : N communication)
[4] Station number
Specify the station number for communication port with BCD data using upper byte of specified word. The
possible data should be less than 31 (H31xx). If the value above 31 is set, initial setting error will be detected. A
to F characters are not allowed to use on the station number. If station number includes A to F, initial setting error
will be detected too.
(Example) In case of station 18 : H18xx
(1)
1 word
(2)
1 word
(Not used)
H 0 0 0 6 / H 0 0 0 8
H 0 0 2 0
(Refer to below)
(Refer to below)
[1] Number of send data (bytes)
[4] Station number
[2] Communication mode
[3] Transmission procedure, Usage of station number
(Refer to below)
[5] Expansion communication setting