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7.6.3
Forced off of Axis 1 OPR request (SM1842)
When the LCPU requests machine OPR upon power on, the Axis 1 OPR request (SM1842) turns on. If the system
does not require machine OPR, the Axis 1 OPR request (SM1842) can be forcibly turned off by turning on the Axis 1
OPR request off (SM1851). The Axis 1 OPR request off (SM1851) should be turned off again after checking that the
Axis 1 OPR request (SM1842) has turned off.
7.6.4
Precautions on Axis 1 OPR request (SM1842)
In the following condition, the Axis 1 OPR request (SM1842) needs to be turned on to perform the machine OPR.
• At power on
• At reset
• When the operating status is switched from STOP to RUN
• When the drive unit ready signal is turned off
• At the start of machine OPR control
While the Axis 1 OPR request (SM1842) is on, address information stored in the LCPU cannot be guaranteed. When
the machine OPR is performed and successfully completed, the Axis 1 OPR request (SM1842) turns off and the Axis 1
OPR completion (SM1843) turns on.
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