Hitachi EH-150 Series Applications Manual page 127

 Error in Hi-Protocol mode
The detected error in Hi-Protocol operation will be indicated in high byte of WX us2 and 3. (The operation will
continue if the error level is not serious.) If the next task code is received properly, the error code WX us2 and 3
will be cleared.
If the TRNS command is executed with some missoperation in Hi-Protocol mode, the return code of TRNS 9
command will be "Illegal command specifying error (Error code H50)".
Error
No. name
Code
1 HFF CPU error
Watch dog timer
2 ---
Error
3 H03 OS system error
Non-valid command
4 H50
error
5 H8A Parity error
6 H8B Framing error
7 H8C Over run error
8 H8D Check code error
9 H8E Receiving timeout error
10 H8F Sending timeout error
Receiving
11 H91
illegal message
« Note »
EH-SIO is checking parity error and framing error in every byte. In case of Hi-Protocol mode, since only the
newest error is indicated, "parity error" and "framing error" can be overwritten by newest error such as "chek code
error". So, if the "check code error" is detected, check also transmit character structure and transmit speed.
Table 6.24 Hi-Protocol mode error during operation
Error
level
EH-SIO operation has been stopped due to the error detection of
---
CPU module (L.RES ON) was done.
MPU of EH-SIO can't operate according the system program
Fatal
anymore, EH-SIO has detected watch dog timer error of MPU.
Failure
EH-SIO has detected an error of system OS.
Fatal
Failure
TRNS 9 command has been used for the port specified as
Warning
SLAVE function or easy data link function.
Parity error has been detected in the received data by EH-SIO.
Warning
Framing error has been detected in the received data by EH-SIO.
Warning
Over run error has been detected in the received data by EH-SIO.
Warning
Check code error has been detected in the received data by
Warning
EH-SIO.
EH-SIO could not complete the receive operation within the
Warning
specified time.
EH-SIO could not complete the send operation within the
Warning specified time. (the monitoring time interval is fixed and it is not
possible to change this time interval.)
EH-SIO receives message data including illegal data.
Warning
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Chapter 6 Communication mode
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