The Mitsubishi L26CPU-BT-CM is a CPU module built for small automation tasks where program space is tight. Standard RAM runs 128 steps (512 bytes) and Standard ROM 512 steps (2048 bytes). Program memory is organized in 1-step (4-byte) increments, so ladder logic must stay compact. File register availability is 384K, and file size can be set per memory area up to 512K points — enough for recipe storage or a modest lookup table, but the program footprint is the real limiter.
Memory management
Program memory is 1 step (4 bytes), meaning each instruction occupies exactly one step. Standard RAM and ROM are fixed at 128 and 512 steps respectively; no expansion is documented. The file register (384K) and file size setting (up to 512K points) offer external data storage via batch transfers. If your application needs more than 128 steps of active work RAM, this CPU will need to page data in and out of the file register — something to verify in the toolchain before committing the BOM.
Lifecycle and sourcing posture
The lifecycle stage is listed as mature. That means the part is still orderable and not flagged for discontinuation, but new design-in recommendations typically shift to a current-generation CPU. No firmware update mechanism is documented in the base spec — treat the binary as fixed. Estimated lead time runs 1–10 working days, so it ships on a normal sourcing cycle. Submit an RFQ to confirm availability for your line.