Chapter 6 Communication mode
6 - 101
6.6.6 Error detection in simple data link mode
As described before, data link is operated by using Hi-Protocol communication. EH-SIO detects errors from salve
stations. In case sending request has an error, error code will be stored in WRF000 in each slave station (self-
diagnostic error code). Refer to the instruction manual for detailed information of the error code.
In this section, error information detected by EH-SIO is described.
Error in initial setting
Detail error information can be confirmed by referring the execution result of TRNS 9 command of t parameter,
return code of s parameter and receiving data area. In case of error bit (t+2) is turned ON after execution of TRNS 9
command, there is some detected error.
Table 6.29 Simple data link mode initial setting error table
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
anymore, EH-SIO has detected watch dog timer error of MPU.
EH-SIO has detected an error of system OS.
Invalid command
specifying error
TRNS 9 command has been executed at the port specified as
slave function or simple data link function.
Over flow error of
number of specified
functions
There is no EH-SIO mounting, over flow of number of specified
functions such as slave function or simple data link function.
Non-supported
command error
-Non-supported command by EH-SIO has been specified.
-Multiple initial settings have been done wit same port even if the
first initial setting has been done. (more than twice execution of
initial setting)
-The parameter of initial setting of EH-SIO was illegal.
-The other command has been executed for a port except initial
command before the completion of initial setting.
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