Yaskawa MEMOCON GL120 - Manual (Page 128)

System Components: Functions and Specifications
4.3.4 Using CPU Modules 1 (For CPU20, CPU30, and CPU35) cont.
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3) Memory Protection
Memory protection can be turned ON and OFF to prohibit or enable alterations to the user
program and other data by programming devices such as Programming Panel or person-
al computer. Select the position required by referring to the following table.
Table 4.21 Memory Protection
Position Name Function
Right P. ON When the key switch is set to P.ON, the CPU Module memory is
protected from alteration. When memory is protected, the following
operations from programming devices (Programming Panels and/or
personal computer, etc.) connected to any Communications port are
prohibited.
1) Creating or altering the user program
2) Load operations
3) Disable operation for coils, relays, etc.
4) Altering reference data (e.g., holding register data, etc.)
Middle P. OFF When the key switch is set to P.OFF, the CPU Module memory can
be altered When memory is not protected the operations prohibited
Left
be altered. When memory is not protected, the operations prohibited
above become possible.
4) RUN Operation
a) The RUN operation setting is used to change the CPU Module from STOP mode to
RUN mode. The CPU Module will changed from STOP mode to RUN mode when the
key switch is turned as follows: Center, then left, and then back to center.
b) When the CPU Module is in RUN mode, operating the key switch will not change the
CPU Module back to STOP mode.
c) RUN operation can also be entered by using programming devices such as Program-
ming Panel or personal computer. Refer to the following manual for operation meth-
ods:
• MEMOCON GL120, GL130 MEMOSOFT for DOS User’s Manual (SIEZ-C825-60.10)
• MEMOCON GL120, GL130 MEMOSOFT for Windows User’s Manual
(SIEZ-C825-60.25)
• MEMOCON GL120, GL130 MEMOSOFT for P120 Programming Panel User’s Manual
(SIEZ-C825-60.7)
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