51
Parameter
Slave error response mode
Sets the response when the slave error occurred. If the slave error occurs, an exception response is returned at the
factory setting. When no exception response is required as in the case of a touch panel, set to "0: Normal response is
returned".
z
Exception response
An exception response is returned if the slave cannot execute the process requested by the query.
Appended to this response is an exception code indicating why the process cannot be executed. The message structure
of exception response is as follows.
Slave address Function code Exception code Error check
8 bits 8 bits 8 bits 16 bits
z
Function code
The function code in the exception response is a sum of the function code in the query and 80h.
Function code of query Exception response
03h 83h
06h 86h
08h 88h
10h 90h
17h 97h
z
Exception code
The exception code when the slave error occurs is shown below.
Exception code Communication error code Description
04h
89h
Communication with user I/F is in progress (downloading or initializing in the
MEXE02
is in progress).
8Ah
Non-volatile memory processing is in progress.
•
Internal processing is in progress (S-BSY is ON).
•
An alarm of EEPROM error is present.
8Ch Outside the parameter setting range (the write value is outside the setting range).
8Dh Command execute disable
Initial group ID
The group send is a function that multiple slaves are made into a group and a query is sent to all slaves in the group at
once. Set a group address (address number of parent slave) to the child slaves to be included in the group. However, the
setting value of the "Group ID" command is saved in the RAM. In this case, if the power supply is turned o, the setting
will be returned to the initial value and the group will be released. Therefore, the group is needed to set again every
time after the power supply is turned on.
On the other hand, the "Initial group ID" parameter is stored in the non-volatile memory. If a group is set in this
parameter, the group will not be released even when the power supply is turned o. The group function can be used
immediately when the power supply is turned on.
To Next Page
Loading...
