Latch With Battery-Less Option Cassette; Usage Procedure - Mitsubishi Electric MELSEC iQ-R-R00CPU User Manual

23.2

Latch with Battery-less Option Cassette

RnPCPU
RnCPU RnENCPU
(Process)
• This function cannot be used in the R00CPU, R01CPU, and R02CPU.
Programmable controller CPUs retain the data in each device/label with latch setting without a battery during power failure by
inserting a battery-less option cassette to the CPU module.
The applicable devices and labels and the latch setting are the same as the ones for the latch with the battery. ( Page 387
Latch with Battery)
The R00CPU, R01CPU, and R02CPU do not need a battery-less option cassette to retain the data in each
device/label with latch setting without a battery during power failure.

Usage procedure

This section describes how to use the latch with the battery-less option cassette.
Setup procedure
Insert/remove a battery-less option cassette / a battery while the programmable controller is powered off.
1.
Insert a battery-less option cassette to the CPU module.
(1)
(2)
2.
Remove the battery from the CPU module. When disconnecting the connector, pull out the connector part so as not to
damage the battery cable.
3.
Mount the CPU module on the base unit.
4.
Power on the programmable controller.
5.
Monitor SM624 (Battery-less option cassette insertion flag) and check that it is on.
Insertion of the battery-less option cassette can be checked from the following items in the engineering tool.
• "Product Information List" in "System Monitor"
• "Module Information List" in "Module Diagnostics"
6.
Set "Mounted" for "Battery-less Option Cassette Setting" in "CPU Parameter" with the engineering tool.
[CPU Parameter]  [Memory/Device Setting]  [Device/Label Memory Area Setting]  [Cassette Setting]  [Battery-
less Option Cassette Setting]
7.
Set "Battery Error" of "CPU Parameter" as "Not Detected".
[CPU Parameter]  [RAS Setting]  [Error Detections Setting]  [Battery Error]
8.
Set "Time Setting" in "Module Parameter".
[Module Parameter]  [Application Settings]  [Time Setting]
The clock data is initialized when the battery-less option cassette is initialized. Clock data cannot be retained during
power failure when no battery is mounted. Therefore, set "Time Setting (SNTP Client)". ( MELSEC iQ-R Ethernet
User's Manual (Application))
23 LATCH FUNCTION
394
23.2 Latch with Battery-less Option Cassette
RnPCPU RnPSFCPU RnPSFCPU RnSFCPU RnSFCPU
(Redundant) (Standard) (Safety) (Standard)
Open the cassette cover (1) located on the side of the CPU module.
Hold the top and bottom of the protruded part (2) of the battery-less option
cassette (with the notched edge facing to the right). Insert the cassette
straight to the connector, taking care not to tilt it. Check the connection for
looseness.
Close the cassette cover (1).
(Safety)