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2. SPECIFICATIONS
MELSEC-A
2.3
Functions
This section explains the various functions of the A64RDC.
2.3.1
Functions list
The following table shows the functions of the A64RDC.
Table 2.3 List of Functions
Item
Conversion
enable/disable set-
ting of each channel
Sampling/average
processing setting
Representation of
detected temperature
values
Disconnection
detection
Setting of platinum
temperature-
measuring resistor
Description
Reference
Section
Temperature detection enabled/disabled is set.
2.3.2
The detected temperature is processed according
to the set processing method. The result is stored
in buffer memory.
The following three processings are available.
Sampling
2.3.3
Time averaging
*
Count averaging
Values to the first and third decimal places are
given.
*
Value
to
the first decimal place (1 6-bit signed
binary)
Example : 53.8('C)
-
538
binary)
Example : 216.025('C)
-
216025
Value to the third decimal place (32-bit signed
2.3.4
Disconnection of a P t l 00 or cable is detected.
A64RD3C
Disconnection at each channel is detected and
the disconnection-detected flag
(X19
to Xln)
that corresponds to that channel goes ON.
2.3.5
A64RD4C
Disconnection at any channel is detected and
the
X
disconnection detected flag XI^) goes
ON.
The type of a platinum temperature-measuring
resistor to be used is set.
The following two kinds
of platinum temperature-
measuring resistors are used:
*
P t l
00
new JIS (DIN) type (JIS C1604-1989,
*
JPtlOO old JIS type (JIS C1604-1981)
2.3.6
DIN 43760-1980)
2 - 4
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