Replacement/Addition Of Extension Cables (Online) - Mitsubishi Electric MELSEC iQ-R Series User Manual

35.2
Replacement/Addition of Extension Cables
(Online)
Extension cables on the inactive side (ACTIVE LED is turned off) between the redundant extension base units can be
replaced or added while the system is running.
• Extension cables can be replaced or added regardless of the operating status of the CPU module.
• Extension cables can be replaced or added regardless of the operation mode of the redundant system.
• Extension cables can be replaced or added when the main base unit of the control system and the
redundant extension base unit are connected properly.
Procedures
This section describes the procedures for replacing or adding extension cables.
■Replacing an extension cable
1.
Check that the target extension cable is inactive based on SD1761 (extension cable route information) or the ACTIVE
LED of the redundant extension base unit.
2.
Disconnect the target extension cable. (CONNECT LED of the redundant extension base unit (on the side of the
removed extension cable) turns off.)
Due to the disconnection of the extension cable, a continuation error, which indicates that the CPU module of
the control system has an extension cable error, is detected.
Even after the replacement had been completed successfully, this extension cable error is not cleared and the
ERROR LED remains on. After replacement, clear the error using the engineering tool.
The date and time when the extension cable was disconnected or failed can be checked in the event history.
3.
Connect a new extension cable. (CONNECT LED of the redundant extension base unit (on the side of the attached
extension cable) turns on.)
4.
Check that the extension cable is attached properly based on SD1760 (extension cable connection status) or the
CONNECT LED of the redundant extension base unit.
■Adding an extension cable
1.
Check the place to add an extension cable.
2.
Connect the extension cable to be added. (CONNECT LED of the redundant extension base unit (on the side of the
attached extension cable) turns on.)
3.
Check that the extension cable is attached properly based on SD1760 (extension cable connection status) or the
CONNECT LED of the redundant extension base unit.
The date and time when the extension cable was connected properly can be checked in the event history.
35 MAINTENANCE AND INSPECTION OF A REDUNDANT SYSTEM
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35.2 Replacement/Addition of Extension Cables (Online)