Mitsubishi Electric MELSEC iQ-R Series User Manual page 365

Item Description
(18)  Logging data are output in binary according to the data type specified with (10) data length and (11) output format.
*2
Data For details on the numerical range of output values, refer to the following:
MELSEC iQ-R High Speed Data Logger Module User's Manual (Startup)
Bit Outputs the following values.
When data is ON: 1
When data is OFF: 0
Word Outputs data value in word units.
*2
[Signed]
Word
[Unsigned]/Bit
String [16-
*2
bit]
16bit BCD
Double Word Outputs data value in double word units.
*2
[Signed]
Double Word
[Unsigned]/Bit
String [32-
*2
bit]
FLOAT [Single
*3
Precision]
32bit BCD
FLOAT Outputs data value in 4-word units.
[Double
*3
Precision]
String Outputs a string of the specified size.
Raw Outputs data values of the specified size.
*1 Data value is rounded to 0.1 millisecond unit when the high speed sampling is specified, and to 100 millisecond unit when the general
sampling is specified.
*2 If a value which cannot be correctly expressed in the specified data type is stored in the device's data value, '0' is output.
*3 When the output format of device data value is '16bit BCD' or '32bit BCD', if a value which cannot be correctly represented in the BCD
type is stored in the data value of a device, the NaN value will be output.
Output format
FLOAT [Single Precision]
FLOAT [Double Precision]
*4 If a string terminator (0) is used halfway in the data, NULL is output up to the specified size terminator for subsequent data.
The size of the data logging binary file is calculated as shown below.
When logging 256 points worth of word [unsigned]/bit string [16-bit] decimal format (0 digit) data
(Data name length: 10, Date information: output in nanosecond units, Index column: output)
File size (maximum)
= 4 [identification code] + 1 [file version] + 1 [file type] + 16 [model information] + 4 [header size]
+ 4 [1 record size] + 2 [additional data information] + 2 [number of pieces of data]
+ (2 [data information size] + 2 [data length] + 2 [data type] + 10 [data name])  256 [number of pieces of data]
+ 1 [record start flag] + 4 [date information (seconds)] + 4 [date information (nanoseconds)] + 4 [index]
+ (2 [data]  256 [number of pieces of data]) + 1 [record end flag]
= 4656 [bytes]
*4
NaN
0xffffffff
0xffffffffffffffff
Appendix 9 Data Logging File Format
Size
(bytes)

1
2
4
8
1 to 8192
1 to 8192
A
APPX
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