Omron CJ1W-PRT21 Operation Manual page 62

Configuration information
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D m+3
D m+3 Output start address (data from Master to Slave PLC)
Indicates the start address in the area indicated in D m+2, to
which the PROFIBUS output data, received from the master,
will be written. The value is provided by the PROFIBUS mas-
ter's Set_Prm telegram, and indicated in D m+3 after both the
Set_Prm and Chk_Cfg telegrams have been accepted.
The indication is only valid in case the output area code is une-
qual to 00.
The start address is indicated as a hexadecimal value in the
range 0000-7FFF (i.e. 0-32767 decimal).
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D m+4
D m+4 Output data length(data from Master to Slave PLC)
The value indicates the size of the area to which the PROFI-
BUS output data, received from the master, will be written. The
value is provided by the PROFIBUS master's Chk_Cfg tele-
gram, and indicated in D m+4 after both the Set_Prm and
Chk_Cfg telegrams have been accepted.
The indication is only valid in case the output area code is une-
qual to 00.
The length (in words) is indicated as a hexadecimal value in
the range 0000-0064 (i.e. 0-100 decimal).
Note Before using the Slave output data in the PLC program, the user is to make
sure the Unit Status Flags (in CIO n+1) indicate that:
• PROFIBUS data exchange is active,
• there are no configuration errors,
and that the correct data format is selected. See section 4-6-3 Slave Output
Data . Otherwise the Slave Output words may contain invalid data.
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Section 4-6
2 1 0
Output start address
2 1 0
Output data length
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