Omron CP1L CPU UNIT - 06-2007 Operation Manual page 390

Serial Communications
Example: Polling Unit Link Method, Highest Unit Number: 3
In the following diagram, Polled Unit No. 2 is a PT or a Unit not participating in
the network, so the corresponding area in the Polling Unit is undefined.
Polling Unit Polled Unit No.0
Local area Polling Unit
Polled Unit
Local area
No.0
Polled Unit
(Not used.)
No.1
Undefined (Not used.)
Polled Unit
(Not used.)
No.3
(Not used.) (Not used.)
(Not used.) (Not used.)
(Not used.) (Not used.)
(Not used.) (Not used.)
Example: Polling Unit Link Method, Number of Link Words: 10
The CPU Unit that is the Polling Unit (either CP1L or CJ1M) sends its data
(CIO 3100 to CIO 3109) to the same words (CIO 3100 to CIO 3109) in all
other CPU Units. The Polled Units send their data (CIO 3110 to CIO 3119) to
consecutive sets of 10 words in the Polling Unit. The Polling Units is a CP1L
CPU Unit in the following example, but it could also be a CJ1M CPU Unit.
(Only the first three Polled Units are shown below.)
CP1L CPU Unit
(Polling Unit)
Serial PLC Link Words
(CIO Area)
3100 to 3109
No.0 3110 to 3119
3120 to 3129
No.1
No.2 3130 to 3139
3140 to 3149
No.3
3150 to 3159
No.4
3160 to 3169
No.5
3170 to 3179
No.6
3180 to 3189
No.7
Polled Unit No.1
Polling Unit
Local area
(Not used.)
(Not used.)
(Not used.)
(Not used.)
(Not used.)
(Not used.)
(Not used.)
CP1L CPU Unit CP1L CPU Unit
(Polled Unit No. 0) (Polled Unit No. 1)
Serial PLC Link Words Serial PLC Link Words
(CIO Area)
(CIO Area)
3100 to 3109
3100 to 3109
3110 to 3119 3110 to 3119
Section 6-3
Polled Unit No.3
Polling Unit
Local area
(Not used.)
(Not used.)
(Not used.)
(Not used.)
(Not used.)
(Not used.)
(Not used.)
CJ1M CPU Unit
(Polled Unit No. 2)
Serial PLC Link Words
(CIO Area)
3100 to 3109
3110 to 3119
357