AX521 1SAP250100R0001 ABB Intelligent spare parts module of control card

Description

COMS RAM and DRAM memory are non reserved types, which means that the contents of the AX521 will be lost if power is lost (ladder
Graph, hardware configuration, etc
Lithium battery, which is usually installed in the power supply module of the rack. To avoid accidental disconnection of the storage backup battery,
It is beneficial to know the connection path between the battery and the template circuit:
For embedded CPU: the AX521 connection path from the battery to the RAM memory is through the substrate connector of the power template and through the bottom of the substrate
The board is connected to the RAM circuit

For plug-in CPUs, the connection path from the battery to the RAM memory is through the base plate connector of the power template to the base plate
It is connected with the CPU base plate connector and the RAM circuit in the CPU module
Obviously, whether it is embedded or plug-in CPU template, removing the power template from the PLC will destroy the standby
The connection between the battery and the RAM memory circuit. Similarly, for the AX521, in a plug-in CPU system, removing the CPU template will also
Disconnect the backup battery from the memory loop. In general, to avoid possible loss of RAM memory
Remember to update the backup of program files constantly. The introduction to establishing a program backup can be found in GFK-04,667
Online help and user guide for series 90-30 programming software user manual and Windows based programming software products
Can be found in
Super memory backup capacitor
In addition to the backup battery, the RAM memory of both embedded and plug-in CPUs has a deeper protection
“Super capacitor”. If the battery is disconnected, the AX521 can store enough power to maintain
The protection time provided by super capacitors depends on the following points:
■ PLC power supply template provides 5V DC voltage for memory circuit, including super capacitor, so when PLC is powered off
The super capacitor has an initial voltage of 5V. If the battery is also disconnected soon after the PLC is powered off
The secondary capacitor will be discharged from 5VDC to 2VDC. At this time, the contents in the memory will be lost
In this way, the super capacitor can maintain the memory content for at least 1 hour
■ The memory backup battery provides 3VDC voltage for the memory circuit, including the super capacitor, so when the PLC is powered off
When the memory circuit is powered by battery for more than one hour, the super capacitor has an initial power of 3V
After that, when the battery is also disconnected, the super capacitor will start discharging from 3VDC until the power is
2VDC, then the contents in the memory will be lost. With this method, the super capacitor can at least maintain the memory
Allow 20 minutes
Maintenance of storage and transportation plug-in CPU
Modular CPUs
The AX521 plug-in CPU has an internal connector that can be installed with a backup battery, so RAM is available during storage and transportation of the CPU
The contents in the memory can be retained when the CPU template has been installed on the substrate and the backup battery has been installed on the power module
After the board is installed, this method cannot be used. In order to use the backup battery in the CPU template, it must be removed from the CPU template
The covering of can be completed as follows:

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