Mitsubishi Q01CPU User Manual

12
TROUBLESHOOTING
12.4 Module Change during System Operation
12.4.1 Online module change
12 - 247
9
EMC AND LOW VOLTAGE DIRECTIVES
10
LOADING AND INSTALLATION
11
MAINTENANCE AND INSPECTION
12
TROUBLESHOOTING APPENDICES INDEX
(3) Special relays and special register related to online module change
Information during online module change is stored into the special relays (SM235,
SM236) and special register (SD235).
• Whether the online module change of the corresponding CPU module is executed
or not can be checked by monitoring SM235, SM236 and SD235.
• SM235: Online module change flag (turns ON during online module change)
• SM236: Flag that turns ON only one scan after online module change (turns ON
only one scan after completion of online module change)
• SD235: Module being changed online (stores the starting I/O number of the module
being changed online/10
H)
Refer to Section 12.7 for details of SM235 and SM236 and to Section 12.8 for details
of SD235.
Diagram 12.22 Time chart
OFF
ON
OFF
ON
SM235
SD235
SM236
1 scan
Online module
change start
Online module
change completed
Starting I/O number of module being
changed online/10
H

Mitsubishi Q01CPU Specifications

General

Brand	Mitsubishi
Model	Q01CPU
Category	Controller
Language	English