Temperature Measurement Data Flow - Hitachi 902 Service Manual

7.2.4 Temperature Measurement Data Flow

Temperature Measurement Data Flow
(relative) d ULONG
0
0
2 V counter value
8
6 V counter value
16
Measurement 1st counter value
for incubator
24
2nd counter value
for incubator
32
3rd counter value
for incubator
40
4th counter value
for incubator
48
56
61
72
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
A
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.
4
Error
information
Error
information
Error
information
Error
inforamtion
Error
information
Error
information
7 - 17
UCOUNT
0
Next storage pointer
2
FLOAT
0
Average incubator
temperature in cycle 1
4
Average incubator
Average of 4
temperature in cycle 2
calculated
temperature
8
Average incubator
values
temeprature in cycle 3
12
16
20
24
(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)
0→ 1→ 2
A