The Honeywell 2MLR‑CPUH/T, also cataloged as the 2MLR‑CPUH/T high‑speed CPU module, serves as the primary processor used to execute cyclic scans, interrupt‑driven tasks, and synchronous I/O control across MasterLogic‑200 platforms.
Scan‑synchronous batch processing (refresh), direct I/O via program instruction
Supported Languages
Ladder Diagram, Sequential Function Chart, Structured Text, Instruction List (view only)
Operators
18
Program Memory
7 MB
Flash Memory
16 MB
Max I/O Bases
31
Max Slots
372
Max Network / Remote I/O
128,000
Profinet / Deterministic Network Behavior
As a MasterLogic‑200 CPU, the module aligns with Honeywell’s deterministic industrial‑network conventions. When deployed in systems using Profinet or similar deterministic Ethernet architectures, the CPU maintains stable scan‑cycle timing and predictable I/O refresh behavior. Internal firmware scheduling ensures consistent execution of interrupt‑driven tasks, while backplane communication supports I/O density scaling across large multi‑rack configurations.
Frequently Asked Questions
Q: Can the 2MLR‑CPUH/T be replaced while the rack is energized? A: No. The CPU is not hot‑swappable. The MasterLogic‑200 rack must be de‑energized before removal or insertion.
Q: Does interrupt‑driven execution affect cyclic scan timing? A: Time‑driven and memory‑driven interrupts execute with priority. Cyclic scan timing adjusts automatically based on interrupt load.
Q: How does the CPU manage large I/O counts? A: The CPU supports up to 128,000 network/remote I/O points using synchronous refresh and direct‑I/O instructions for time‑critical operations.
Field Installation Guidelines
Insert the CPU vertically until the backplane connector fully engages; avoid lateral force that may stress the connector.
Route communication wiring separately from high‑voltage conductors to reduce electromagnetic coupling.
Bond shielded cable grounds at a single termination point to prevent circulating currents.
Maintain adequate airflow around the CPU to avoid thermal buildup within the enclosure.
Verify correct I/O addressing and scan‑cycle configuration before commissioning.
