24
Read Parameter (PRM_RD)
The PRM_RD command is used to read the Inverter's internal constants. For offline parame-
ters, it reads the most recently updated setting values.
This command can be used in all phases.
Note: If the MECHATROLINK-II 32-byte mode is used, PRM_RD can be
used only in a sub-command.
In the following cases, a warning (STATUS (WARNING) = 1) is generated and the com-
mand is ignored. If a warning is generated, the values that are read are undefined.
• While using the Digital Operator to change settings: Command alarm (A.95)
• If received as a main command in 32-byte mode: Command alarm (A.95)
• If a register number (NO) fault occurs: User constant setting alarm (A.94)
• If SIZE is an odd number or is not between 2 and 8: User constant setting alarm (A.94)
The register number (NO) is the same as the register number that is set and referenced in
MEMOBUS transfers. Set the lower byte (LSB) before setting the upper byte (MSB).
The SI-T/V7 stores the data read for PARAMETER from lower byte (LSB) to upper byte
(MSB).
For SIZE, set the number of bytes to be read as an even numbers. Eight bytes can be speci-
fied.
The values for the number (NO) and the size (SIZE) in the response are copies of the values
in the command.
Byte
Command
Response
1
PRM_RD
PRM_RD
2
ALARM
3
STATUS
4
5
NO
NO
6
7
SIZE
SIZE
8
PARAMETER
9
10
11
12
13
14
15
16
WDT
RWDT
