Many plants run reliably with controllers that have long gone out of production. If a module fails, good preparation helps to find a replacement quickly.
What matters for the replacement
A controller consists of a CPU module, input and output modules, power supply and communication modules. Each has an order number and often a hardware or firmware revision. With CPU modules in particular, a different revision can mean that the program does not run.
An up-to-date backup of the control program and the parameters is therefore important. For older modules, tested used or exchange parts are options besides remaining stock. With recurring demand, planning a migration to a current controller generation pays off.
What a request for control modules should contain
- full order number and revision
- photo of the module with its labels
- new, used or exchange acceptable
- whether a program backup exists
- quantity and urgency
Read more
Similar requirement?
Send us your parts list, a nameplate or a drawing. We check the sourcing and get back to you.