Precautions - Mitsubishi Electric Q01UCPU User Manual

3.37.4

Precautions

The following describes the precautions for the write-protect function for device data (from outside the CPU module).
(1) Execution of the executional conditioned device test
When specifying and registering the indirect specified/index-modified device or the file register (R) in the
executional conditioned device test, disable the write-protect function for device data (from outside the CPU
module) before execution.
If the function is enabled, an error occurs at registration when the indirect specified/index-modified device or the
file register (R) is specified.
(2) Writing to the index register (Z) and index-modified device
When writing a value to the index register with the SLMP/MC protocol command 1402 (Write Random/Random
write) and changing the access destination to write data by using the index register, disable the write-protect
function for device data (from outside the CPU module) before execution. Alternatively, execute writing to the
index register (Z) and writing to the index-modified device separately and with multiple commands. If they are
specified simultaneously in a single command, an error occurs.
When the index register (Z0) is changed and device data are written to D0, D5, and D10
Ex.
Data register
D0
Write 10.
D5
Write 25.
D10
Write 50.
<SLMP/MC protocol>
When the write-protect function for device data (from outside the CPU module)
D0Z0 (Z0=0)
is disabled
D0Z0 (Z0=5)
Command
1402
D0Z0 (Z0=10)
When the write-protect function for device data (from outside the CPU module)
is enabled
Command
Ò
Command
Ó
Command
Ô
Command
Õ
Command
Ö
Command
×
Device Value Device Value Device Value
...
Z0 K0 D0Z0 K10 Z0 K5
(D0←10)
Device Value
...
1402 Z0 K0 Z0←0
Device Value
...
1402 D0Z0 K10 D0←10
(D0)
Device Value
...
1402 Z0 K5 Z0←5
Device Value
...
1402 D0Z0 K25 D5←25
(D5)
Device Value
...
1402 Z0 K10 Z0←10
Device Value
...
1402 D0Z0 K50 D10←50
(D10)
CHAPTER 3 FUNCTIONS
Device Value Device Value Device Value
D0Z0 K25 Z0 K10 D0Z0 K50
(D5←25) (D10←50)
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