Omron Sysmac CJ Series, Operation Manual

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32
Data Exchange with the CPU Unit Section 2-5
2-5-4 Operation Data
Operation Data is exchanged between the words allocated to the Temperature
Control Unit in the Special I/O Unit Area in the CIO Area of the CPU Unit and
the Temperature Control Unit. The Operation Data includes the Process Val-
ues, Set Points, Stop Bits, Start AT Bits, Stop AT Bits, and other basic data.
Operation data is exchanged each cycle time during the I/O refresh period.
Input data is transferred from the Temperature Control Unit to the CPU Unit
and output data is transferred from the CPU Unit to the Temperature Control
Unit.
Note 1. For Two-loop Temperature Control Units, the read and write values for the
heater burnout alarm are transferred.
2. The Special I/O Unit Area words that are allocated to the Temperature
Control Unit in the CIO Area are determined by the setting of the unit num-
ber switch on the front panel of the Unit. Refer to
2-3-3 Unit Number
Switches for details on the method used to set the unit number switch.
3. If two or more Special I/O Units are assigned the same unit number, an
“UNIT No. DPL ERR” error (in the Programming Console) will be generat-
ed (A40113 will turn ON) and the PLC will not operate.
EPROM
RAM
CPU Unit
I/O refresh
Power ON
or restart
I/O refresh
At power ON or restart if
pin 8 of DIP switch is ON.
Temperature Control Unit
Temperature Control
Unit backup area
Operation
Data
Initialization
Data
Operating
Parameters
Save Bit
turned ON
CJ-series CPU Unit
Unit 0
Unit 1
Unit 2
Unit 3
Unit 4
Unit 5
Unit 6
Unit 7
Unit 8
Unit 9
:
Unit n
:
Unit 94
Allocated words
CIO 2000 to CIO 2019
CIO 2010 to CIO 2029
CIO 2020 to CIO 2039
CIO 2030 to CIO 2049
CIO 2040 to CIO 2059
CIO 2050 to CIO 2069
CIO 2060 to CIO 2079
CIO 2070 to CIO 2089
CIO 2080 to CIO 2099
CIO 2090 to CIO 2109
:
CIO 2000 + (n x 10) to
CIO 2000 + (n x 10) + 19
:
CIO 2940 to CIO 2959
Input data is
transferred from the
Temperature Control
Unit to the CPU Unit
and output data is
transferred from the
CPU Unit to the
Temperature Control
Unit each cycle.
Temperature Control Unit
Operation Data
Output data for loops
1 and 2 (output
refresh)
Input data for loops 1
and 2 (input refresh)
Output data for loops 3
and 4 (output refresh)
(See note 1.)
CIO n
to
CIO n + 2
CIO n + 3
to
CIO n + 9
CIO n + 13
to
CIO n + 19 Input data for loops 3
and 4 (input refresh)
(See note 1.)
n = 2000 + (10 x unit number)
Special I/O Unit Area in CIO Area
CIO n + 10
to
CIO n + 12