Omron Sysmac CJ Series, Operation Manual

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44
Data Exchange with the CPU Unit Section 2-5
2-5-5 Initialization Data
The Temperature Control Unit is initialized by the transfer of data settings from
the DM Area words that are allocated to the Temperature Control Unit as a
Special I/O Unit. If you are using the temperature alarm function, the alarm
mode setting and alarm hysteresis setting must be written to the appropriate
DM words.
Settings in these DM words are read only when the power is turned ON or the
Temperature Control Unit is restarted. Always turn the power ON or restart the
Temperature Control Unit after changing any of these settings.
Note 1. Loops 3 and 4 are applicable to Temperature Control Units with four control
loops only. If a Temperature Control Unit with two control loops is being
used, the alarm mode and alarm hysteresis settings for loops 3 and 4 will
not be used and will be ineffective even if they are set.
2. The Special I/O Unit Area words that are allocated to the Temperature
Control Unit in the DM 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.
Outputs
(CPU Unit
to Tem-
perature
Control
Unit) n+10 00 to 15 Loop 1 Heater Burn-
out Current
Set the heater burnout current in 4-digits BCD or 16-bits binary.
If the value is set to 0.0, heater burnouts will not be detected.
If the value is set to 50.0, the heater burnout output will always be
ON. (This can be used to test wiring.)
n+11 00 to 15 Loop 2 Heater Burn-
out Current
n+12 00 to 15 --- --- Leave set to all zeros.
n+13 00 to 15 Loop 1 Heater Cur-
rent
The current heater current is stored in 4-digits BCD or 16-bits
binary.
If the measured heater current exceeds 55.0 A, the CT Overflow
Flag will turn ON and the heater current will be stored as CCCC.
n+14 00 to 15 Loop 2 Heater Cur-
rent
n+15 00 to 15 Loop 1 Heater Burn-
out Current
The current heater burnout current is stored in 4-digits BCD or 16-
bits binary.
n+16 00 to 15 Loop 2 Heater Burn-
out Current
n+17 00 to 15 --- --- Leave set to all zeros.
n+18 00 to 15 --- --- Leave set to all zeros.
n+19 00 to 15 --- --- Leave set to all zeros.
I/O Address Loop Name Function
Word Bits
SYSMAC CJ-series CPU Unit
Unit 0
Allocated DM addresses
D20000 to D20099
Automatically
transferred for each
unit number when the
power is turned ON or
the Unit is restarted.
Temperature Control Unit
Initialization Data
Alarm mode settings
for loops 1 and 2
:
m = 20000 + (100 x unit number)
Unit 1 D20100 to D20199
Unit 2 D20200 to D20299
Unit 3 D20300 to D20399
Unit 4 D20400 to D20499
Unit 5 D20500 to D20599
Unit 6 D20600 to D20699
Unit 7 D20700 to D20799
Unit 8 D20800 to D20899
Unit 9 D20900 to D20999
:
Unit n
n
×
100 to
n
×
100 + 99
:
Unit 94 D29400 to D29499
Alarm mode settings
for loops 3 and 4
Alarm hysteresis
settings for loops 1
through 4
D (m)
D (m+1)
D (m+2)
D (m+9)