Filter
Top Products
9 - 5
9.5 Spare Product
Alternative products are easily purchased through Mitsubishi service centers or local
Mitsubishi representatives in Japan. Thus the alternative products can be prepared
even after an accident. However, note that for foreign-related products such as
exported products, alternative products must be sent beforehand.
Considering the following tips at design work makes the maintenance easier.
(1) Easily replaceable type
Replacing building block-type modules is easy. Only replacing the faulty module
is required.
(2) Memory type
To use standard RAMs or SRAM memory cards, backup batteries are required.
The standard ROMs, Flash cards, and ATA cards do not require the battery for
use, besides, these memories prevent unintentional program changes due to
human-related mistakes. These memories are recommended to be employed in
products for export.
(3) Reducing the number of module types
Reducing the number of module types is efficient for reducing the number of
spare product types.
(4) Reserving I/O points
By not using all the I/O points on 16-, 32-, and 64-point I/O modules but
reserving 10% to 20% of them, it is possible to just make changes on wiring and
programs (I/O signals) instead of replacing the faulty module with a spare
module when there are no spare modules.
(5) Creating a document
Since sequence programs are easily modified, the inconsistency between an
operating program and documents may occur (i.e. ladder diagram, program list).
Keep updating the document.
To do this, using a printer is efficient.
(6) Mastering peripheral device
Mastering peripheral device such as a personal computer, GX Works2 helps
the quick recovery from an accident.