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MELSOFT
7 MANAGEMENT OF DATA IN THE PLC CPU
(3) Motion controller (SCPU)
Since the motion controller (SCPU) is recognized as the ACPU by GX Explorer,
the project of any of the following PLC types is enabled for write/read to/from
PLC.
(a) Write to PLC
Write Source PLC Type (Project) Write Destination CPU
A171SH , A2SH A2SH, A171SH (displayed as A2SH on GX Explorer)
A172SH , A3N A3N, A172SH (displayed as A3N on GX Explorer)
A173UH (S1) , A273UH (S1) ,
A3U
A3U, A173UH(S1) (displayed as A3U on GX
Explorer), A273UH(S1) (displayed as A3U on GX
Explorer)
: Write to PLC is performed as the data of the motion controller (SCPU).
(b) Read from PLC
Read Destination PLC Type (Project) Read Source CPU
A171SH , A2SH A2SH, A171SH (displayed as A2SH on GX Explorer)
A172SH , A3N A3N, A172SH (displayed as A3N on GX Explorer)
A173UH (S1) , A273UH (S1) ,
A3U
A3U, A173UH(S1) (displayed as A3U on GX
Explorer), A273UH(S1) (displayed as A3U on GX
Explorer)
: Read from PLC is performed as the data of the motion controller (SCPU).
(4) Password/keyword setting
(a) QCPU (Q mode)
When a password has been set to the QCPU (Q mode), enter the
password at the time of write/read to/from PLC and click the [Execute]
button.
If you enter a wrong password, the password check dialog box reappears.
The password must be entered every time operation for write/read to/from
PLC is performed.
(b) QnACPU
When a password has been set to the QnACPU, the keyword cannot be
canceled at the time of write/read to/from PLC.
Delete the keyword and perform write/read to/from PLC. (Refer to Section
7.4 (2).)
(c) ACPU, QCPU (A mode)
When a keyword has been set to the ACPU or QCPU (A mode), write/read
to/from PLC cannot be performed using GX Explorer. Use GX Developer to
perform write/read to/from PLC.
(5) Project of label program
Read from PLC cannot be performed to the project of a label program of the
QCPU (Q mode) or QnACPU.
"Global variables", "Label" and "Local label" are disabled for write to PLC.