Omron CJ1W-PRT21 Operation Manual page 36

Physical layout of the Unit
MACH No.
NODE ADDRESS
3-1-3 BUS Connector
Data Signal
RTS
The MACH No. rotary switches are used to select the CJ1 Special I/O Unit
number or so called "Machine No.".
The Special I/O number setting determines which words in the CIO Area and
Data Memory Area are allocated to the CJ1W-PRT21.
Any Machine number in the setting range is allowed as long as it has not been
set on another Special I/O Unit connected to the PLC. If the same number is
used for the CJ1W-PRT21 and another Special I/O Unit, an Unit/Rack Num-
ber Duplication error (FALS 80E9) will occur in the PLC, and it will not be pos-
sible to start up the PROFIBUS-DP Slave communication see ( Appendix B
Device specific parameters and diagnostics ).
Two switches, marked Node No. x10
BUS-DP node address of the Unit. Addresses in the range of 00 through 99
are valid. Be sure the node address on the unit is equal to the station address
in the masters configuration.
The fieldbus connector is a 9-pin female sub-D connector, as recommended
in the PROFIBUS standard EN50170 Vol.2.
Table 1 Profibus Connector
Pin No. Signal
1 Shield
2 -
3 B-line
4 RTS
5 DGND
6 VP
7 -
8 A-line
9 -
The PROFIBUS User Group recommends the following colour coding for the
data signal lines:
A-line = Green
These data signal lines must be connected to the corresponding signal termi-
nals or pins at the master unit and other stations (i.e. A to A, B to B). For
detailed PROFIBUS-DP cable requirements, see 3-3-1 Fieldbus cabling .
The signal RTS (TTL signal relative to DGND) is meant for the direction con-
trol of repeaters in case repeaters without self control capability are used
1 0
and x10 , are used to set the PROFI-
Description
Shield / functional ground
-
Data signal
Direction control signal for repeaters (TTL)
Data ground
Supply voltage for terminator resistance (+5V)
-
Data signal
-
B-line = Red
Section 3-1
17