Process Cpu; 40.1 Module Replacement In A System Using The Sil2 Process Cpu; Chapter 40 Maintenance And Inspection For A System Using Sil2 Process Cpu - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

40
MAINTENANCE AND INSPECTION FOR A
SYSTEM USING SIL2 PROCESS CPU
This chapter describes the maintenance and inspection for a system using the SIL2 Process CPU.
40.1
Module Replacement in a System Using the SIL2

Process CPU

This section describes the methods of replacing modules in a system using the SIL2 Process CPU while the system is
operating.
• Replacing modules in a control system with the online module change function
• Replacing modules in a standby system (To replace modules in a standby system, power off the standby system or use the
online module change function.)
: Replaceable, : Not replaceable
Replacement target
CPU module and SIL2 function module
Power supply module
Redundant power supply module
Redundant function module
Network module
Main base unit
*1 This module in a redundant power supply system can be replaced.
*2 To replace this module without powering off the system, use the online module change function. ( MELSEC iQ-R Online Module
Change Manual)
*3 When an error has been detected on a redundant function module in the control system, a continuation error occurs on the CPU
module, and the control system and the standby system continue operating without being switched. Perform online module change if the
redundant function module has failed. ( MELSEC iQ-R Online Module Change Manual)
*4 Since the CPU module and SIL2 function module are used as a pair, replace them at the same time.
Since the standby system needs to be powered off for replacing their modules, a continuation error occurs on
the CPU module of the control system. After the replacement, clear the continuation error that has occurred
on the CPU module of the control system. ( Page 133 Error Clear)
The following describes how to replace modules in the standby system (by powering off the standby system).
Replacement
Control system Standby system
*4
 
 
*1
 
*3
 
 
 
40 MAINTENANCE AND INSPECTION FOR A SYSTEM USING SIL2 PROCESS CPU

40.1 Module Replacement in a System Using the SIL2 Process CPU

Reference
Page 698 Replacing a CPU module and SIL2 function module
Page 698 Replacing a power supply module
Page 699 Replacing a redundant power supply module
*2
Page 699 Replacing a redundant function module
Page 699 Replacing a network module
Page 700 Replacing a main base unit
40
697