Card redundancy issues in PLC systems and SIS systems
Thread Content
How are the spare parts availability rates for PLC system cards in a purely station control setup determined, and how are those rates determined for SIS system cards?
By the redundancy rate you mentioned, do you mean the number of redundant channels divided by the total number of channels?
Generally, 20% backup is provided online (additional capacity can be added), and 20% backup is provided in terms of storage space (additional storage units can be added)
20% backup for channels (additional slots can be added), 20% backup for card slots (full backup of card slots), 20% backup for space (additional card slots can be added). In practical applications, 10% backup is generally sufficient to meet the requirements related to technical upgrades.
Could you explain in detail the specific content of each one? Space reserve?
Could you explain in detail the specific content of each one? Space reserve?
Channel reserve means that there are available channels for the cards that are in use; card reserve refers to cards that are not being used at all, but have already been configured by the manufacturer during hardware setup. Space reserve means that your cabinet has enough space to allow for the installation of additional cards