Hitachi 902 - Temperature Measurement Data Flow

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7.2.4 Temperature Measurement Data Flow
Temperature Measurement Data Flow
(relative) d ULONG
0→ 1→ 2
0
2 V counter value Error
information
0
Next storage pointer
8
6 V counter value Error
information
2
Measurement 16 1st counter value
for incubator
Error
information
FLOAT
24 2nd counter value
for incubator
Error
inforamtion
0 Average incubator
temperature in cycle 1
32 3rd counter value
for incubator
Error
information
Average of 4
calculated
4 Average incubator
temperature in cycle 2
40 4th counter value
for incubator
Error
information
temperature
values
8 Average incubator
temeprature in cycle 3
48 12
56 16
61 20
72 24
80
Information at acquisition of each counter value is
set for error information.
(ADC return information)
0: Normal
1: Reference 2 V counter value abnormal
2: Reference 6 V counter value abnormal
3: Time-out (200 msec)
4: I/O error
(1) The average of 4 calculated temperature
values is set to the relevant temperature
storage area indicated by the pointer.
(2) Error InformationData
1) In the event of error in reference 2 V/6 V
measurement, "0" is set for both
temperatures indicated by the pointer.
2) In the event of error in incubator
temperature measurement, "0" is set for
the temperature.
(3) The temperature is "0" unless 3 cycles pass
after initial startup, because all temperatures
are not set.
(unmeasured area)
ULONG
0
Average incubator
temperature in 3 cycles
4
8
(1) Set the average value in 3 cycles. (value rounded to 1st decimal point and multiplied by 10)
(2) If "0" (error)is acquired at least once for the temperature in cycle 1 to 3, "0" is set for the relevant
temperature. In addition, alarm judgement at occurrence of error is not made.
In the event of error, 0°C is output to the external object.
(3) If Temperature acquisition is made before the lapse of 3 cycles after intial startup, 0°C is output.
A
0 4 UCOUNT
A