Specifications Of Each Module - Mitsubishi Electric MELSEC iQ-R Series Manual

Specifications of each module

This section describes the specifications of online module change for each module.
Redundant function modules
■Precautions
• Performing online module change in the control system and the standby system simultaneously is not possible.
• After 'Module remove request flag' (SM1602) is turned on, the communication via the redundant function module stops until
'Module recognition request flag' (SM1606) is turned on. In addition, the systems remain in the system switching disable
state until 'Module control resumption request flag' (SM1608) is commanded.
• In the system in which a redundant function module is being changed online, a new continuation error due to a tracking
disable state is not detected from when 'Module recognition request flag' (SM1606) is turned on (regardless of whether the
module is removed or not) until the control restarts. If the communication is disabled after the control restarts (the status
switches to the normal processing), a continuation error due to a tracking disable state is detected. In the other system, a
continuation error due to the communication disable state is detected if tracking is disabled.
I/O modules
■Module-specific backup parameter
The module-specific backup parameter is not provided, and thus no data is backed up.
I/O modules with diagnostic functions
■Module-specific backup parameter
The module-specific backup parameter is not provided, and thus no data is backed up.
A/D converter modules
■Restoration of the user range setting
Setting the following item to "Enable" allows the module-specific backup parameter (offset/gain value) in the CPU module or
remote head module to be automatically restored upon module recognition. Thus, even without the use of dedicated
instructions or other means, a newly replaced A/D converter module operates with the same user range setting as that of the
old A/D converter module.
Setting the following item to "Disable" does not allow the offset/gain value to be automatically restored upon module
recognition. When replacing the module with a new A/D converter module where the offset/gain setting is already set up, set
the following item to "Disable" to perform online module change.
[Navigation window]  [Parameter]  Target module  [Module Parameter]  [Application setting]  [Online module
change]  [Auto restore of Offset/gain setting with the module change]
Replacing the module with an A/D converter module where the offset/gain setting is already set up results in
the mismatch of offset/gain values between the module-specific backup parameter of the CPU module or
remote head module and the user range. After the replacement, update the module-specific backup
parameter of the CPU module or remote head module. For the update method, refer to the User's Manual
(Application) for each module.
■Q compatible mode
A module in operation in Q compatible mode also allows online module change. The newly replaced A/D converter module
starts up in Q compatible mode.
■Operation mode
Online module change is permitted regardless of the mode set as the operation mode. After the replacement, the operation
starts up with the settings of module parameters written in the CPU module or remote head module.
3 REPLACEMENT PROCEDURE
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3.1 Specifications