B-61813E/03 CONNECTIONS 9. TEMPERATURE INPUT MODULE
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• Status signals
DI13 : Abnormality sign bit
1 : This bit is set to "1" when the temperature
input is abnormal. DI00 to DI12 are used
to describe the abnormality.
0 : DI00 to DI12 are used to indicate the
temperature data.
DI14 : CH1 data READY
1 : Read the CH1 temperature data from DI00
to DI12 when this bit is set to "1".
DI15 : CH3 data READY
1 : Read the CH3 temperature data from DI00
to DI12 when this bit is set to "1".
• CH1 temperature data, CH3 temperature data, or
abnormality data
DI00 (LSB) to DI12 (MSB):
These bits indicate temperature input data
(CH1/CH3) or abnormality data.
Temperature input data
The temperature input data is in binary. It is ten times the actual
temperature.
Example
(83EDh → 1005 → 100.5℃)
The highest three bits are status signals.
For the thermoresistance-type module (ATI04A), the DI12 bit is a sign
bit. (Negative data is represented in two's complement.)
Example
(9F9Ch → -10.0℃)
The highest three bits are status signals.
Abnormality data
If an abnormality occurs in the input data or in the module, the DI13 bit
(status signal) becomes "1", resulting in the display changing from
temperature input data to abnormality data. Abnormality data is
assigned to these bits as listed below:
DI00 : CH1 input out of scale--the current temperature falls
outside the measurable range.
DI01 : CH1 input burn-out--the cable or connector has been
detached.
DI02 : CH3 input out of scale--the current temperature falls
outside the measurable range.
DI03 : CH3 input burn-out--the cable or connector has been
detached.
DI04 : Cold-junction abnormality (only for thermocouple-type
input module)--the temperature of the terminal board unit
falls outside the measurable range.