Mitsubishi Electric M800VW Series Manual page 543

M800V/M80V Series PLC Development Manual
6 Explanation of Built-in Editing Function (PLC On-board)
6.17 Device Menus
File I/O (read/write)
Items
Input (read)
Output (write)
Delete
(*1) Trace data size calculation
The size of trace data per project depends on the max project No.
The size of trace data for the user safety sequence "SafePLC1" and "SafePLC2" are fixed to 220 kilobytes respectively.
The size of trace data per project for different numbers of maximum project No.
Max project No.
1
2
3
4
5
6
Set the number of traces and the trace devices when the maximum project No. is 6, so that the trace device data size will
be 25 kilobytes (25600 bytes) or smaller.
Trace data size is calculated as follows.
[Trace data size (byte)] = [Size required for one trace (byte)] x [Number of traces]
Size required for one trace is calculated from word device points and bit device points of the trace device and the size
required for one trace of each device.
Trace device type
Word device
Bit device
Calculation example for trace data size is shown below.
Trace data size calculation example
(When the maximum project No. is "3": The maximum project size is 64 kilobytes)
No. Bit device points
1 16 (1 unit)
2 8 (1 unit)
3 50 points (4 units)
4 50 points (4 units)
IB-1501614-B
This reads the trace files (trace conditions and trace results) stored in the external device.
(The trace files are included in GX Developer projects.)
For the file convertibility with GX Developer, refer to (*4).
This writes the trace files (trace conditions and trace results) to the external device.
(The trace files are included in GX Developer projects.)
For the file convertibility with GX Developer, refer to (*4).
This deletes the trace files (trace conditions and trace results) of the external device.
(The trace files are included in GX Developer projects.)
Maximum size of trace data per project
220 kilobytes
103 kilobytes
64 kilobytes
44 kilobytes
32 kilobytes
25 kilobytes
Size (byte) required for one trace
2 bytes per point
2 bytes per unit (1 unit = 16 points)
1 to 16 points -> 1 unit -> 2 bytes
17 to 32 points -> 2 units -> 4 bytes
33 to 48 points -> 3 units -> 6 bytes
49 to 50 points -> 4 units -> 8 bytes
Word device points Trace points
2 8192 point
8 point 1000 point
50 point 606 point
50 point 607 point
Specifications
Trace data size
(1×2+2×2)×8192 ＝ 49152 bytes
(1×2+8×2)×1000 ＝ 18000 bytes
(4×2+50×2)×606 ＝ 65448 bytes
(4×2+50×2)×607 ＝ 65556 bytes
518
Sampling
Possible
Possible
Possible
Not possible